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Showing 1 - 200 of 2329 Journals sorted alphabetically
3D Research     Hybrid Journal   (Followers: 19, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 9, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 18, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 5, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 2, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 22, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 7, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 10, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 5, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 14, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 3)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 1, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 6, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 10, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 18, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 4, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 6, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 3, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 9, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 13, SJR: 0.658, h-index: 20)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 20, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 14, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 34, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 2)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 53, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 8, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 23, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 40, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 1, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 8, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 14, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agriculture and Human Values     Hybrid Journal   (Followers: 12, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 20, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 7, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 3, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 2, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 7, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 4, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 14, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 10, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 24, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 7, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 11, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 21, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 11, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 7, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 5, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal  
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 4)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 28, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 15, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 12, SJR: 2.112, h-index: 98)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 3, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 8)
Annals of Dyslexia     Hybrid Journal   (Followers: 9, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 28, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 4, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 13, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 9, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 8, SJR: 1.186, h-index: 78)
Annals of Regional Science     Hybrid Journal   (Followers: 7, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 12)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 10, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 11, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 7, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 8, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 44, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 17, SJR: 0.267, h-index: 26)
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 46, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 2, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 7, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 14, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 61, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 7, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 23, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 7, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 15, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 30, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 3, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 12, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 1, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 21, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 52, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 7, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.865, h-index: 40)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 6, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 10, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 16, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 9, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 16, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 13, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 1, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 15, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 8, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 4, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 9, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 11, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 11, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 20, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 7, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 7)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21, SJR: 4.511, h-index: 44)
Astronomy Letters     Hybrid Journal   (Followers: 19, SJR: 0.58, h-index: 30)
Astronomy Reports     Hybrid Journal   (Followers: 12, SJR: 0.473, h-index: 23)
Astrophysical Bulletin     Hybrid Journal   (Followers: 2, SJR: 0.469, h-index: 11)

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Journal Cover Annals of Nuclear Medicine
  [SJR: 0.68]   [H-I: 45]   [5 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1864-6433 - ISSN (Online) 0914-7187
   Published by Springer-Verlag Homepage  [2329 journals]
  • Long-term results and tolerability of tandem peptide receptor radionuclide
           therapy with 90 Y/ 177 Lu-DOTATATE in neuroendocrine tumors with respect
           to the primary location: a 10-year study
    • Authors: Jolanta Kunikowska; Dariusz Pawlak; Marianna I. Bąk; Beata Kos-Kudła; Renata Mikołajczak; Leszek Królicki
      Pages: 347 - 356
      Abstract: Introduction The peptide receptor radionuclide therapy (PRRT) with 90Y and 177Lu is a form of molecular targeted therapy for inoperable or disseminated neuroendocrine tumors (NET). Aim The aim of the study was to evaluate clinical results and long-term side effects of tandem 90Y /177Lu-DOTATATE therapy in patients with NET. Additionally, we evaluated clinical results with reference to the primary site. Materials and methods 59 patients with disseminated NET were included in the study prospectively. 3–5 cycles of combined 1:1 90Y/177Lu-DOTATATE (total injected activity 11.1–16.65 GBq) with mixed amino acids for kidney protection were performed. Results During a median follow-up of 75.8 months, the PFS was 32.2 months, and the OS was 82 months; 25 patients died. Depending on primary tumor’s site, the PFS and the OS for pancreatic NET vs. small bowel, NET vs. large bowel, NET were 30.4 vs. 29.5 vs. 40.3 and 78.9 vs. 58.1 vs. 82.5, respectively. The observed 5-year overall survival was 63%, and a 2-year risk of progression was 39.4%. The following imaging response was observed: CR in 2%, PR in 22%, SD in 65%, and PD in 6% patients. The disease control rate was 89%. The objective response rate was 24%. The PRRT was well tolerated by all patients. One patient (2%) revealed MDS, and one patient (2%) grade 3 nephrotoxicity. No other grade 3 and 4 hematological or renal toxicity was observed. Conclusions These results indicated the tandem 90Y/177Lu-DOTATATE therapy for patients with disseminated/inoperable NET as highly effective and safe, considering long-term side effects. In the majority of patients, clinical improvement was observed.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1163-6
      Issue No: Vol. 31, No. 5 (2017)
  • Compared to 123 I-MIBG SPECT/CT, 18 F-DOPA PET/CT provides accurate tumor
           extent in patients with extra-adrenal paraganglioma
    • Authors: Alexander Stephan Kroiss; Christian Uprimny; Barry Lynn Shulkin; Andreas Frech; Herbert Tilg; Rudolf Wolfgang Gasser; Georg Mathias Sprinzl; Leonhard Gruber; Claudius Thomé; Clemens Plangger; Christoph Url; Gustav Fraedrich; Irene Johanna Virgolini
      Pages: 357 - 365
      Abstract: Aim The aim of this study was to compare the accuracy of 123I-MIBG SPECT/CT with that of 18F-DOPA PET/CT for staging extra-adrenal paragangliomas (PGLs) using both functional and anatomical images (i.e., combined cross-sectional imaging) as the reference standards. Methods Three men and seven women (age range 26–73 years) with anatomical and/or histologically proven disease were included in this study. Three patients had either metastatic head-and-neck paragangliomas (HNPGLs) or multifocal PGL, and seven patients had nonmetastatic disease. Comparative evaluation included morphological imaging with CT, functional imaging with 18F-DOPA PET, and 123I-MIBG imaging including SPECT/CT. Imaging results were analyzed on a per-patient and per-lesion basis. Results On a per-patient basis, 18F-DOPA PET’s detection rate for both nonmetastatic and metastatic/multifocal disease was 100%, whereas that of planar 123I-MIBG imaging alone was 10.0% and that of 123I-MIBG SPECT/CT was 20.0%. Overall, on a per-lesion basis, 18F-DOPA PET showed a sensitivity of 69.2% (McNemar p < 0.001) compared with anatomical imaging. Sensitivity of planar 123I-MIBG scintigraphy was 5.6%, and that of SPECT/CT was 11.1% (McNemar p < 0.0001). Overall, 18F-DOPA PET identified 18 lesions, and anatomical imaging identified 26 lesions; planar 123IMIBG imaging identified only 1 lesion, and SPECT/CT, 2 lesions. Conclusion 18F-DOPA PET is more sensitive than is 123I-MIBG imaging, including SPECT/CT, for staging HNPGL. Combined functional and anatomical imaging (PET/CT) is indicated to exclude metastatic disease in extra-adrenal PGL.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1162-7
      Issue No: Vol. 31, No. 5 (2017)
  • Comparison of 18F-FDG-PET/CT and 18F-FDG-PET/MR imaging in oncology: a
           systematic review
    • Authors: Amit Singnurkar; Raymond Poon; Ur Metser
      Pages: 366 - 378
      Abstract: Objective The aim of this study was to systematically review the literature to evaluate the clinical performance of integrated 18F-FDG PET/MR as compared with 18F-FDG PET/CT in oncologic imaging. Methods The literature was searched using MEDLINE and EMBASE via OVID. Studies comparing the diagnostic accuracy of integrated 18F-FDG PET/MR and 18F-FDG PET/CT in the diagnosis, staging/restaging, assessment of treatment response, or evaluation of metastasis in patients with suspected or diagnosed cancers were deemed eligible for inclusion. Risk of bias and applicability concerns were assessed using the QUADAS-2 tool. Results Twenty studies met the inclusion criteria. The overall quality of the studies was rated favorably with bias or applicability concerns in a few studies. Our review suggests that 18F-FDG PET/MR performs comparably to 18F-FDG PET/CT in the detection of local lymph node and distant metastases and superiorly in determining the local extent of tumor. SUV obtained from 18F-FDG PET/MR correlated highly with those obtained from 18F-FDG PET/CT. Conclusions Based on early evidence, 18F-FDG PET/MR is comparable to 18F-FDG PET/CT in the clinical scenarios examined in this review. The potential for interchangeability of 18F-FDG PET/MR with 18F-FDG PET/CT will vary by indication and the body site that is being imaged, with PET scanners integrated with MRI predicted to provide greater detail in the evaluation of local tumor extent, where 18F-FDG PET/CT can be limited.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1164-5
      Issue No: Vol. 31, No. 5 (2017)
  • Survival and prognostic factors after adjuvant 131 iodine-labeled lipiodol
           for hepatocellular carcinoma: a retrospective analysis of 106 patients
           over 20 years
    • Authors: Jonathan Olesinski; François Mithieux; Olivier Guillaud; Marie-Noëlle Hilleret; Catherine Lombard-Bohas; Luc Henry; Olivier Boillot; Thomas Walter; Christian Partensky; Pierre Paliard; Pierre-Jean Valette; Jean-Philippe Vuillez; Françoise Borson-Chazot; Jean-Yves Scoazec; Jérôme Dumortier
      Pages: 379 - 389
      Abstract: Objective Hepatocellular carcinoma (HCC) has high recurrence rate after curative treatment. The aim of the present study was to report our experience with adjuvant use of 131I-lipiodol after curative treatment of HCC in terms of recurrence and survival in a large cohort of patients with a long follow-up. Methods All patients treated with 131I-lipiodol after curative treatment of HCC in two French centers from 1991 to 2009 were included in a retrospective cohort study. Results One hundred and six patients were included. The median (range) follow-up was 6 years (0.3–22). Forty-three patients (41%) had cirrhosis. Recurrence-free survival rates at 1, 2, 5, 10, and 20 years were 73, 57, 40, 30, and 14%, respectively. Cirrhosis was an independent predictive factor of recurrence [RR = 1.18, 95% CI (1.11–3.02), p = 0.019]. Overall, survival rates at 1, 2, 5, 10, and 20 years were 90, 83, 59, 37, and 23%, respectively. Prognostic factors were recurrence [RR = 2.73, 95% CI (1.35–5.54); p = 0.005], age over 60 years (RR = 1.91, 95% CI [1.02–3.61]; p = 0.044), and tumor number over 3 [RR = 3.31, 95% CI (1.25–8.77); p = 0.016]. Conclusion Our results suggest that the effect of 131I-lipiodol after curative treatment of HCC could be related to a beneficial impact on risk factors of early tumor recurrence. This could be evaluated in further studies using modern radioembolization methods.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1165-4
      Issue No: Vol. 31, No. 5 (2017)
  • Correlation between clinical symptoms and striatal DAT uptake in patients
           with DLB
    • Authors: Soichiro Shimizu; Disuke Hirose; Nayuta Namioka; Hidekazu Kanetaka; Kentaro Hirao; Hirokuni Hatanaka; Naoto Takenoshita; Yoshitsugu Kaneko; Yusuke Ogawa; Takahiko Umahara; Hirofumi Sakurai; Haruo Hanyu
      Pages: 390 - 398
      Abstract: Objective It is widely known that there is low striatal 123I-FP-CIT dopamine transporter-single photon emission tomography (DAT-SPECT) uptake in patients with dementia with Lewy bodies (DLB). We assessed the correlation between symptom and regional low DAT uptake in the striatum. Methods Patients with Alzheimer’s disease (AD) (n = 95) and patients with DLB (n = 133) who underwent DAT-SPECT were enrolled. We examined the correlation between symptoms [cognitive function decline, fluctuations, visual hallucinations, parkinsonism, and REM sleep behavior disorder (RBD)] and regional striatal DAT uptake in the patients with DLB. Results When comparing the DLB patients with or without fluctuations, visual hallucinations, or RBD, there were no significant differences in DAT uptake in any regions of the striatum. DLB patients with parkinsonism had significantly lower DAT uptake in entire striatum, entire putamen, and anterior putamen compared to DLB patients without parkinsonism. Moreover, there was weak but significant correlation between severity of parkinsonism and DAT uptake in entire regions of the striatum in patients with DLB. There was no significant correlation between cognitive function and DAT uptake in any regions of the striatum in patients with DLB. Conclusions In patients with DLB, only parkinsonism is associated with a reduction in striatal DAT uptake.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1166-3
      Issue No: Vol. 31, No. 5 (2017)
  • Incidental spade-shaped FDG uptake in the left ventricular apex suggests
           apical hypertrophic cardiomyopathy
    • Authors: Mari Katagiri; Tadaki Nakahara; Mitsushige Murata; Yuji Ogata; Yohji Matsusaka; Yu Iwabuchi; Yoshitake Yamada; Keiichi Fukuda; Masahiro Jinzaki
      Pages: 399 - 406
      Abstract: Purpose Apical wall thickening with an “ace-of-spades” configuration is a unique sign of apical hypertrophic cardiomyopathy (AHCM). We investigated spade-shaped FDG uptake around the left ventricular apex (SSUA) incidentally found in routine oncological FDG PET. Methods Cases showing SSUA were selected based on retrospective review. The pattern or intensity of SSUA was compared with the results of electrocardiogram (ECG), echocardiography, and stress myocardial perfusion SPECT. The diagnosis of ACHM was based on the presence of giant negative T wave in ECG, thickness of spade-shaped hypertrophy in the apex in echocardiography, and increased tracer uptake in the apex in rest SPECT. Results Among the 34 patients in 36 PET scans showing SSUA, SSUA was weak in 17 and intense in 17. There were isolated SSUA (n = 29) and SSUA with diffuse or other focal left ventricular uptake (n = 5). Three patients with the latter uptake pattern turned out to have coexistence of AHCM and asymmetric septal hypertrophy. Of the 16 SSUA-positive patients who underwent echocardiography, 13 (81%) were diagnosed as AHCM and the remaining 3 were regarded as borderline AHCM (apical wall thickness, 14–15 mm). There were 16 patients with SSUA who also underwent PET scans after the study period among which 11 (69%) had persistent SSUA in the follow-up PET. In the remaining 5, follow-up PET scans showed diffuse left ventricular uptake and SSUA was barely visible. The intensity of SSUA was significantly or marginally associated with giant negative T wave (p < 0.01), apical asynergy (p = 0.08), and impaired coronary flow reserve (p < 0.05). There were no other factors correlated with the pattern or intensity of SSUA. Conclusion SSUA incidentally found in oncological FDG PET appeared to be associated with AHCM, especially in ischemic conditions. The moderate repeatability of SSUA was probably due to obscurity by physiological uptake.
      PubDate: 2017-06-01
      DOI: 10.1007/s12149-017-1167-2
      Issue No: Vol. 31, No. 5 (2017)
  • Visual evaluation of kinetic characteristics of PET probe for
           neuroreceptors using a two-phase graphic plot analysis
    • Authors: Hiroshi Ito; Yoko Ikoma; Chie Seki; Yasuyuki Kimura; Hiroshi Kawaguchi; Hiroyuki Takuwa; Masanori Ichise; Tetsuya Suhara; Iwao Kanno
      Pages: 273 - 282
      Abstract: Abstract Objectives In PET studies for neuroreceptors, tracer kinetics are described by the two-tissue compartment model (2-TCM), and binding parameters, including the total distribution volume (V T), non-displaceable distribution volume (V ND), and binding potential (BPND), can be determined from model parameters estimated by kinetic analysis. The stability of binding parameter estimates depends on the kinetic characteristics of radioligands. To describe these kinetic characteristics, we previously developed a two-phase graphic plot analysis in which V ND and V T can be estimated from the x-intercept of regression lines for early and delayed phases, respectively. In this study, we applied this graphic plot analysis to visual evaluation of the kinetic characteristics of radioligands for neuroreceptors, and investigated a relationship between the shape of these graphic plots and the stability of binding parameters estimated by the kinetic analysis with 2-TCM in simulated brain tissue time-activity curves (TACs) with various binding parameters. Methods 90-min TACs were generated with the arterial input function and assumed kinetic parameters according to 2-TCM. Graphic plot analysis was applied to these simulated TACs, and the curvature of the plot for each TAC was evaluated visually. TACs with several noise levels were also generated with various kinetic parameters, and the bias and variation of binding parameters estimated by kinetic analysis were calculated in each TAC. These bias and variation were compared with the shape of graphic plots. Results The graphic plots showed larger curvature for TACs with higher specific binding and slower dissociation of specific binding. The quartile deviations of V ND and BPND determined by kinetic analysis were smaller for radioligands with slow dissociation. Conclusions The larger curvature of graphic plots for radioligands with slow dissociation might indicate a stable determination of V ND and BPND by kinetic analysis. For investigation of the kinetics of radioligands, such kinetic characteristics should be considered.
      PubDate: 2017-05-01
      DOI: 10.1007/s12149-017-1155-6
      Issue No: Vol. 31, No. 4 (2017)
  • Pixel-by-pixel precise delay correction for measurement of cerebral
           hemodynamic parameters in H 2 15 O PET study
    • Authors: Muhammad M. Islam; Tetsuya Tsujikawa; Tetsuya Mori; Yasushi Kiyono; Hidehiko Okazawa
      Pages: 283 - 294
      Abstract: Objective A new method of delay time estimation was proposed to measure precise cerebral blood flow (CBF) and arterial-to-capillary blood volume (V 0) using 15O-water PET. Methods Nineteen patients with unilateral arterial stenoocclusive lesions were studied to evaluate hemodynamic status before treatment. The delay time of each pixel was calculated using least squares fitting with an arterial blood input curve adjusted to the internal carotid artery counts at the skull base. Pixel-by-pixel delay estimation provided a delay map image that could be used for precise calculation of CBF and V 0 using a one-tissue compartment model, and the values from this method were compared with those from the slice-by-slice correction method. Results The affected side showed a longer delay time than the contralateral cerebral hemisphere. Although the mean cortical CBF values were not different between the two methods, the slice-by-slice delay correction overestimated CBF in the hypo perfused area. The scatter plot of V 0 pixel values showed significant difference between the two correction methods where the slice-by-slice delay correction significantly overestimated V 0 in the whole brain (P < 0.05). Conclusion Pixel-by-pixel delay correction provides delay images as well as better estimation of CBF and V 0, thus offering useful and beneficial information for the treatment of cerebrovascular disease.
      PubDate: 2017-05-01
      DOI: 10.1007/s12149-017-1156-5
      Issue No: Vol. 31, No. 4 (2017)
  • 3D SPECT/CT fusion using image data projection of bone SPECT onto 3D
           volume-rendered CT images: feasibility and clinical impact in the
           diagnosis of bone metastasis
    • Authors: Yuji Ogata; Tadaki Nakahara; Kenichi Ode; Yohji Matsusaka; Mari Katagiri; Yu Iwabuchi; Kazunari Itoh; Akira Ichimura; Masahiro Jinzaki
      Pages: 304 - 314
      Abstract: Purpose We developed a method of image data projection of bone SPECT into 3D volume-rendered CT images for 3D SPECT/CT fusion. The aims of our study were to evaluate its feasibility and clinical usefulness. Methods Whole-body bone scintigraphy (WB) and SPECT/CT scans were performed in 318 cancer patients using a dedicated SPECT/CT systems. Volume data of bone SPECT and CT were fused to obtain 2D SPECT/CT images. To generate our 3D SPECT/CT images, colored voxel data of bone SPECT were projected onto the corresponding location of the volume-rendered CT data after a semi-automatic bone extraction. Then, the resultant 3D images were blended with conventional volume-rendered CT images, allowing to grasp the three-dimensional relationship between bone metabolism and anatomy. WB and SPECT (WB + SPECT), 2D SPECT/CT fusion, and 3D SPECT/CT fusion were evaluated by two independent reviewers in the diagnosis of bone metastasis. The inter-observer variability and diagnostic accuracy in these three image sets were investigated using a four-point diagnostic scale. Results Increased bone metabolism was found in 744 metastatic sites and 1002 benign changes. On a per-lesion basis, inter-observer agreements in the diagnosis of bone metastasis were 0.72 for WB + SPECT, 0.90 for 2D SPECT/CT, and 0.89 for 3D SPECT/CT. Receiver operating characteristic analyses for the diagnostic accuracy of bone metastasis showed that WB + SPECT, 2D SPECT/CT, and 3D SPECT/CT had an area under the curve of 0.800, 0.983, and 0.983 for reader 1, 0.865, 0.992, and 0.993 for reader 2, respectively (WB + SPECT vs. 2D or 3D SPECT/CT, p < 0.001; 2D vs. 3D SPECT/CT, n.s.). The durations of interpretation of WB + SPECT, 2D SPECT/CT, and 3D SPECT/CT images were 241 ± 75, 225 ± 73, and 182 ± 71 s for reader 1 and 207 ± 72, 190 ± 73, and 179 ± 73 s for reader 2, respectively. As a result, it took shorter time to read 3D SPECT/CT images than 2D SPECT/CT (p < 0.0001) or WB + SPECT images (p < 0.0001). Conclusions 3D SPECT/CT fusion offers comparable diagnostic accuracy to 2D SPECT/CT fusion. The visual effect of 3D SPECT/CT fusion facilitates reduction of reading time compared to 2D SPECT/CT fusion.
      PubDate: 2017-05-01
      DOI: 10.1007/s12149-017-1158-3
      Issue No: Vol. 31, No. 4 (2017)
  • Prognostic value of pre-treatment 18 F-FDG-PET uptake in small-cell lung
    • Authors: Meryem Aktan; Mehmet Koc; Gul Kanyilmaz; Berrin Benli Yavuz
      Abstract: Purpose Small-cell lung cancer (SCLC) is an aggressive disease, despite an initially favorable response to treatment, and its prognosis is still poor. Multiple parameters have been studied as possible prognostic factors, but none of them are reliable enough to change the treatment approach. 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET) is a novel imaging technique for staging of SCLC. The aim of this study was to evaluate the prognostic value of pre-treatment FDG-PET parameters on clinical outcome in limited stage (LS) SCLC patients treated with curative thoracic radiotherapy (RT) and chemotherapy. Methods Clinical records of 46 LS-SCLC patients with pre-treatment FDG-PET imaging were retrospectively reviewed. Patients were treated with definitive RT for a total dose of 50–60 Gy and chemotherapy. The clinical endpoints were progression-free survival (PFS) and overall survival (OS). Results The median age was 59 (range 30–82) years, and median follow-up time was 23.2 months (range 5–82.8 months). Median OS was 30.9 months for pre-treatment tumor maximum standardized uptake value (SUVmax) <9.3 and 20.6 months for SUVmax ≥9.3 (p = 0.027) and PFS was 55.6 months for SUVmax <9.3 and 38.6 months for SUVmax ≥9.3 (p = 0.16). Median OS was 73 months for pre-treatment lymph node SUVmax <5.8 and 21 months for ≥5.8 (p = 0.01) and PFS was 38.6 months (range 6.8–70.3 months) for SUVmax-LN ≥5.8; all patients with SUVmax-LN <5.8 were alive (p = 0.07). Median survival time was 28.2 months (range 21.7–34.7 months) for patients younger than 65 and 8.7 months (range 5.7–11.8 months) for those ≥65 years (p = 0.00). Conclusions Pre-treatment FDG-PET uptake may be a valuable tool to evaluate prognosis in SCLC patients. Patients with a higher pre-treatment FDG uptake may be considered at increased risk of failure and may benefit from more aggressive treatment approaches.
      PubDate: 2017-05-17
      DOI: 10.1007/s12149-017-1178-z
  • Erratum to: Comparative evaluation of the algorithms for parametric
           mapping of the novel myocardial PET imaging agent 18 F-FPTP
    • Authors: Ji Who Kim; Seongho Seo; Hyeon Sik Kim; Dong-Yeon Kim; Ho-Young Lee; Keon Wook Kang; Dong Soo Lee; Hee-Seung Bom; Jung-Joon Min; Jae Sung Lee
      PubDate: 2017-05-11
      DOI: 10.1007/s12149-017-1179-y
  • Pathogenesis and FDG-PET/CT findings of Epstein–Barr virus-related
           lymphoid neoplasms
    • Authors: Akira Toriihara; Reiko Nakajima; Ayako Arai; Masashi Nakadate; Koichiro Abe; Kazunori Kubota; Ukihide Tateishi
      Abstract: Abstract Epstein–Barr virus (EBV) is one of the most common viruses, infecting more than 90% of the adult population worldwide. EBV genome is detected in some lymphoid neoplasms. Not only their histopathological subtypes, but also their backgrounds and their clinical courses are variable. A number of B-cell lymphoproliferative disorders associated with the immunocompromised state are related to EBV infection. The incidences of these disorders have been increasing along with generalization of organ transplantations and use of immunosuppressive treatments. Furthermore, some EBV-positive lymphoma can also occur in immunocompetent patients. While evaluating patients with generalized lymphadenopathy of unknown cause by positron emission tomography/computed tomography with 2-deoxy-2-[18F]fluoro-d-glucose (FDG-PET/CT), the possibility of lymphoid neoplasms should be considered in some patients, and a careful review of the background and previous history of the patients is necessary. In this review article, we describe the pathogenesis of EBV-related lymphoid neoplasms and then present FDG-PET/CT images of representative diseases. In addition, we also present a review of other EBV-related diseases, such as infectious mononucleosis and nasopharyngeal carcinoma.
      PubDate: 2017-05-11
      DOI: 10.1007/s12149-017-1180-5
  • Evaluation of 99m Tc-3PRGD 2 integrin receptor imaging in hepatocellular
    • Authors: Jieling Zheng; Weibing Miao; Chao Huang; Haoxue Lin
      Abstract: Objective Our study was designed to explore the utility of 99mTc-HYNIC-PEG4-E[PEG4-c(RGDfK)]2 (99mTc-3PRGD2) for the detection of hepatocellular carcinoma (HCC) and specifically to compare the diagnostic performance of 99mTc-3PRGD2 integrin receptor imaging and 2-18-fluoro-2-deoxy-d-glucose (18F-FDG) metabolic imaging in a nude mouse model. Methods 99mTc-3PRGD2 was synthesized using a HYNIC-3PRGD2 lyophilized kit with 99mTcO4 labelling. The nude mouse animal model was established by subcutaneously injecting 5 × 107/ml HepG2 cells into the shoulder flank of each mouse. Biodistribution studies were performed at 0.5, 1, 2 and 4 h after intravenous administration of 0.37 MBq of 99mTc-3PRGD2. Immunohistochemistry was performed to evaluate the expression level of integrin αvβ3 in the HCC tissues. Dynamic imaging was performed using list-mode after the administration of 55.5 MBq of 99mTc-3PRGD2, to reconstruct the multiphase images and acquire the best initial scan time. At 8, 12, 16, 20 and 24 days after inoculation with HepG2 cells, 55.5 MBq of 99mTc-3PRGD2 and 37 MBq of 18F-FDG were injected successively into the nude mouse model, subsequently, simultaneous SPECT/PET imaging was performed to calculate the tumour volume and tumour uptake of 99mTc-3PRGD2 and 18F-FDG. Results The biodistribution study first validated that the tumour uptake of 99mTc-3PRGD2 at the different time points was higher than that of all the other organs tested in the experiment, except for the kidney. Integrin αvβ3 expressed highly in early stage HCC and declined for further necrosis of the tumour tissue. Subcutaneous tumours were visualized clearly with excellent contrast under 99mTc-3PRGD2 SPECT/CT imaging, and the multiphase imaging comparison showed the tumours were prominent at 0.5 h, suggesting that the best initial scan time is 0.5 h post-injection. The comparison of the imaging results of the two methods showed that 99mTc-3PRGD2 integrin receptor imaging was more sensitive than 18F-FDG metabolic imaging for the detection of early stage HCC, meanwhile the tumour uptake of 99mTc-3PRGD2 was consistently higher than that of 18F-FDG. However, as tumour necrosis further increased in HCC tissues, the uptake of 18F-FDG was higher than that of 99mTc-3PRGD2. Conclusion Our study demonstrated that 99mTc-3PRGD2 is a valuable tumour molecular probe for the detection of early stage HCC compared with 18F-FDG, meriting further investigation of 99mTc-3PRGD2 as a novel SPECT tracer for tumour imaging.
      PubDate: 2017-05-04
      DOI: 10.1007/s12149-017-1173-4
  • Characteristics of single- and dual-photopeak energy window acquisitions
           with thallium-201 IQ-SPECT/CT system
    • Authors: Takayuki Shibutani; Masahisa Onoguchi; Hiroto Yoneyama; Takahiro Konishi; Shinro Matsuo; Kenichi Nakajima; Seigo Kinuya
      Abstract: Objectives Although dual-energy (DE) acquisition with conventional 201Tl myocardial perfusion SPECT has several advantages such as improved attenuation of the inferior wall and increased acquisition counts, the characteristics of IQ-SPECT have not been fully evaluated. We evaluate the difference of characteristics between single-energy (SE) and dual-energy (DE) imaging using 201Tl myocardial IQ-SPECT. Methods Two myocardial phantoms were created simulating normal myocardium and infarction of the inferior wall. Energy windows were set at 70 keV ± 10% for SE, and an additional 167 keV ± 7.5% for DE. SPECT images were reconstructed using the ordered subset conjugates gradient minimizer (OSCGM) method. We visually and quantitatively compared short-axis images of correction for no (NC), for attenuation (AC) or for both AC and scatter (ACSC) images. Results The average counts of SE and DE projection data were 17.5 and 20.3 counts/pixel, respectively. The DE data increased acquisition counts by approximately 16% compared with the SE data. The average visual score of normal myocardium did not differ significantly between the SE and DE images. However, the DE image of defective myocardium showed a significantly lower score in AC than SE images. The % uptake values of DE image with both NC and AC were significantly higher than those of SE images. The DE images of the inferior defective areas (segments 4 and 10) showed approximately 5–10% higher uptake compared with the SE images. Conclusion The DE image with NC improved attenuation of the inferior wall. However, DE image with AC showed low defect detectability. Thus, AC should be used with SE rather than DE. Furthermore, while the SE image with ACSC can be used to detect perfusion defects, it must be interpreted carefully including the possibility of artificial inhomogeneity even in the normal myocardium.
      PubDate: 2017-05-03
      DOI: 10.1007/s12149-017-1177-0
  • FDG-PET/CT predicts survival and lung metastasis of hypopharyngeal cancer
           in a multi-institutional retrospective study
    • Authors: Hidenori Suzuki; Katsuhiko Kato; Masami Nishio; Tsuneo Tamaki; Yasushi Fujimoto; Mariko Hiramatsu; Nobuhiro Hanai; Takeshi Kodaira; Yoshiyuki Itoh; Shinji Naganawa; Michihiko Sone; Yasuhisa Hasegawa
      Abstract: Objectives We investigated a possible correlation between the maximum standardized uptake value (SUVmax), which is assessed by pretreatment 18F-fluorodeoxyglucose positron emission tomography with computed tomography, and the overall survival (OS) in patients with hypopharyngeal squamous cell carcinoma from two institutions on long-term follow-up, and examined whether SUVmax is correlated with several survival outcomes, including lung metastasis-free survival. Methods A total of 81 patients were enrolled. The survival rate was calculated by the Kaplan–Meier method. Both univariate and multivariate survival analyses were assessed by a Cox proportional hazards model. Results SUVmax ≥15.2 in institution A (p = 0.0306) or SUVmax ≥8 in institution B (p = 0.0132) was significantly predictor of a lower OS. We disaggregated the data by high SUVmax (SUVmax ≥15.2 from institution A and SUVmax ≥8 from institution B) and low SUVmax (SUVmax <15.2 from institution A and SUVmax <8 from institution B). Patients with a high SUVmax exhibited a significantly lower OS in both univariate (p = 0.001) and multivariate (p = 0.0046) analyses for adjusted for the clinical stage and treatment group. The patients with a high SUVmax exhibited significantly shorter disease-specific (p = 0.0068), distant metastasis-free (p = 0.0428), and lung metastasis-free (p = 0.0328) survivals. Conclusions High SUVmax was significantly correlated with a lower OS, disease-specific survival, distant metastasis-free survival, and lung metastasis-free survival in a multi-institutional retrospective study.
      PubDate: 2017-05-03
      DOI: 10.1007/s12149-017-1176-1
  • Glucose uptake of the muscle and adipose tissues in diabetes and obesity
           disease models: evaluation of insulin and β3-adrenergic receptor agonist
           effects by 18 F-FDG
    • Authors: Seigo Ishino; Taku Sugita; Yusuke Kondo; Mika Okai; Kazue Tsuchimori; Masanori Watanabe; Ikuo Mori; Masaki Hosoya; Takashi Horiguchi; Hidenori Kamiguchi
      Abstract: Objective One of the major causes of diabetes and obesity is abnormality in glucose metabolism and glucose uptake in the muscle and adipose tissue based on an insufficient action of insulin. Therefore, many of the drug discovery programs are based on the concept of stimulating glucose uptake in these tissues. Improvement of glucose metabolism has been assessed based on blood parameters, but these merely reflect the systemic reaction to the drug administered. We have conducted basic studies to investigate the usefulness of glucose uptake measurement in various muscle and adipose tissues in pharmacological tests using disease-model animals. Methods A radiotracer for glucose, 18F-2-deoxy-2-fluoro-d-glucose (18F-FDG), was administered to Wistar fatty rats (type 2 diabetes model), DIO mouse (obese model), and the corresponding control animals, and the basal glucose uptake in the muscle and adipose (white and brown) tissues were compared using biodistribution method. Moreover, insulin and a β3 agonist (CL316,243), which are known to stimulate glucose uptake in the muscle and adipose tissues, were administered to assess their effect. 18F-FDG uptake in each tissue was measured as the radioactivity and the distribution was confirmed by autoradiography. Results In Wistar fatty rats, all the tissues measured showed a decrease in the basal level of glucose uptake when compared to Wistar lean rats. On the other hand, the same trend was observed only in the white adipose tissue in DIO mice, while brown adipose tissue showed increments in the basal glucose uptake in this model. Insulin administration stimulated glucose uptake in both Wistar lean and fatty rats, although the responses were inhibited in Wistar fatty rats. The same tendency was shown also in control mice, but clear increments in glucose uptake were not observed in the muscle and brown adipose tissue of DIO mice after insulin administration. β3 agonist administration showed the similar trend in Wistar lean and fatty rats as insulin, while the responses were inhibited in the adipose tissues of Wistar fatty rats. Conclusion A system to monitor tissue glucose uptake with 18F-FDG enabled us to detect clear differences in basal glucose uptake between disease-model animals and their corresponding controls. The responses in the tissues to insulin or β3 agonist could be identified. Taken as a whole, the biodistribution method with 18F-FDG was confirmed to be useful for pharmacological evaluation of anti-diabetic or anti-obesity drugs using disease-model animals.
      PubDate: 2017-04-11
      DOI: 10.1007/s12149-017-1169-0
  • Age-related effects and gender differences in Japanese healthy controls
           for [ 123 I] FP-CIT SPECT
    • Authors: Hideo Yamamoto; Shinichi Arimura; Atsushi Nakanishi; Yasushi Shimo; Yumiko Motoi; Koichi Ishiguro; Koji Murakami; Nobutaka Hattori; Shigeki Aoki
      Abstract: Objective Dopamine transporter (DAT) imaging with [123I]FP-CIT (DaTSCAN) is a widely used diagnostic tool for Parkinsonism and dementia. Since it was approved by the Japanese Ministry of Health, Labor, and Welfare in 2013, there have been no articles focusing on a Japanese normal population. The aim of this study was to examine the effect of aging and gender on DAT availability in Japanese people. Methods SPECT imaging of 30 healthy Japanese controls (17 males, 13 females; range 50–86 years, mean 70 years) was performed. SPECT images were reconstructed using a three-dimensional order subset expectation maximization (OSEM) algorithm with correction of the point spread function and scatter correction, without attenuation correction. The specific binding ratio (SBR) was calculated by DATview software. Statistical analyses were performed using linear regression analysis, analysis of variance, and multiple comparison analysis. Results A strong correlation between the SBR and age was observed. The correlation coefficient in males and females were −0.566 and −0.502, respectively. The analysis of variance revealed that aging led to a decline of the SBR, and a significant difference (p = 0.005) was observed among generations. Gender also affected the SBR, and there was a significant difference between males and females (p = 0.036). The SBR in females was higher than in males. Consequently, the multiple comparison revealed a significant difference between 50s and 70s (p = 0.015) and 50s and 80s (p = 0.006). Conclusions This is the first [123I]FP-CIT SPECT study on subjects with normal dopamine function in Asian countries. This study provides a database of [123I]FP-CIT SPECT in Japanese healthy controls. Higher DAT availability was found in women than in men. An average age-related decline in DAT availability of 8.9% was found in both genders. The data collected in this study would be helpful for Japanese physicians to make a differential diagnosis in Parkinsonian syndrome. The registration identification number for this study is UMIN000018045.
      PubDate: 2017-04-05
      DOI: 10.1007/s12149-017-1168-1
  • Radioiodination and preclinical evaluation of 4-benzyl-1-(3-[ 125
           I]-iodobenzylsulfonyl)piperidine as a breast tumor imaging tracer in mouse
    • Authors: Masoud Sadeghzadeh; Behrouz Alirezapour; Ghorban Ali Charkhlooie; Maryam Keshavarz Baghery; Amir Khorouti
      Abstract: Objective 4-Benzyl-1-(3-iodobenzylsulfonyl)piperidine, 4-B-IBSP, has shown high-binding affinity to both sigma (σ) receptors in our previous work. In current study, radiolabeling and preclinical evaluation of 4-benzyl-1-(3-[125I]-iodobenzylsulfonyl)piperidine, 4-B-[125I]IBSP, in human ductal breast carcinoma (T47D) cells and in breast adenocarcinoma-bearing BALB/c mice are described. Methods Radioiodination of this new σ ligand was performed by a palladium-catalyzed stannylation approach followed by oxidative iododestannylation reaction using Iodo-Gen. Competition-binding assays for binding of 4-B-[125I]IBSP to guinea pig brain membranes and to T47D cells were performed with known σ ligands. The selectivity and binding characteristics (B max and K d) were analyzed. In vitro stability and in vivo blood metabolism studies were also evaluated. Moreover, biodistribution studies were performed in normal and into the tumor-bearing mice at interval time points post-injection (p.i.). Both in vitro and in vivo blockade experiments were done in the presence of the σ receptors blocking agents. Results Radioiodinated ligand was obtained in high yield and high specific activity. The σ inhibition constants (K i, nM) for 4-(3-iodobenzyl)-1-(benzylsulfonyl)piperazine (4-IBBSPz), (+)-pentazocine, haloperidol, DTG, and 4-B-IBSP were 1.37 ± 0.19, 3.90 ± 0.77, 2.69 ± 0.33, 30.62 ± 2.01, and 0.61 ± 0.05, respectively. 4-B-[125I]IBSP bound to σ receptor sites preferably to very high-affinity binding sites on T47D cells. The radioligand showed acceptable in vitro and in vivo stabilities in the blood pool. However, in vivo biodistribution studies in normal Swiss albino mice revealed fast clearance of 4-B-[125I]IBSP from blood and the other normal organs. Biodistribution experiments of 4-B-[125I]IBSP in breast adenocarcinoma tumor-bearing BALB/c mice showed a relatively high tumor uptake at 30 min p.i. (4.13 ± 0.95) that reaches to 1.57 ± 0.24 even after 240 min p.i. A pre-injection of 4-B-IBSP and haloperidol with 4-B-[125I]IBSP resulted in 36–57% decrease in activity in the tumor, liver, and brain at 60 min p.i. Conclusions The high affinity of 4-B-[125I]IBSP to σ receptor-binding sites, its relatively high uptake, and preferential retention in the tumor as well as an increasing trend observed in the tumor to blood and in the tumor to muscle ratios suggests that an iodine-123 labeled counterpart, 4-B-[123I]IBSP, would be a promising σ radioligand for pursuing further studies to assess its potential for breast tumors imaging with SPECT.
      PubDate: 2017-03-17
      DOI: 10.1007/s12149-017-1161-8
  • Serial imaging using [18F]Fluorodeoxyglucose positron emission tomography
           and histopathologic assessment in predicting survival in a population of
           surgically resectable distal oesophageal and gastric adenocarcinoma
           following neoadjuvant therapy
    • Authors: Varun Manoharan; Soon Lee; Shanley Chong; June Yap; Nick Coupe; Robert Wilson; Neil Merrett; Weng Ng; Michael Lin
      Abstract: Background and objectives We retrospectively evaluated the value of PET/CT in predicting survival and histopathological tumour-response in patients with distal oesophageal and gastric adenocarcinoma following neoadjuvant treatment. Methods Twenty-one patients with resectable distal oesophageal adenocarcinoma and 14 with gastric adenocarcinoma between January 2002 and December 2011, who had undergone serial PET before and after neoadjuvant therapy followed by surgery, were enrolled. Maximum standard uptake value (SUVmax) and metabolic tumour volume were measured and correlated with tumour regression grade and survival. Results Histopathological tumour response (PR) is a stronger predictor of overall and disease-free survival compared to metabolic response. ∆%SUVmax ≥70% was the only PET metric that predicted PR (82.4% sensitivity, 61.5% specificity, p = 0.047). Histopathological non-responders had a higher risk of death (HR 8.461, p = 0.001) and recurrence (HR 6.385, p = 0.002) and similarly in metabolic non-responders for death (HR 2.956, p = 0.063) and recurrence (HR 3.614, p = 0.028). Ordinalised ∆%SUVmax showed a predictive trend for OS and DFS, but failed to achieve statistical significance. Conclusions PR was a stronger predictor of survival than metabolic response. ∆%SUVmax ≥70% was the best biomarker on PET that predicted PR and survival in oesophageal and gastric adenocarcinoma. Ordinalisation of ∆%SUVmax was not helpful in predicting primary outcomes.
      PubDate: 2017-03-15
      DOI: 10.1007/s12149-017-1159-2
  • Design and performance evaluation of a new high energy parallel hole
           collimator for radioiodine planar imaging by gamma cameras: Monte Carlo
           simulation study
    • Authors: Vahid Moslemi; Mansour Ashoor
      Abstract: Objective In addition to the trade-off between resolution and sensitivity which is a common problem among all types of parallel hole collimators (PCs), obtained images by high energy PCs (HEPCs) suffer from hole-pattern artifact (HPA) due to further septa thickness. In this study, a new design on the collimator has been proposed to improve the trade-off between resolution and sensitivity and to eliminate the HPA. Methods A novel PC, namely high energy extended PC (HEEPC), is proposed and is compared to HEPCs. In the new PC, trapezoidal denticles were added upon the septa in the detector side. The performance of the HEEPCs were evaluated and compared to that of HEPCs using a Monte Carlo-N-particle version5 (MCNP5) simulation. The point spread functions (PSF) of HEPCs and HEEPCs were obtained as well as the various parameters such as resolution, sensitivity, scattering, and penetration ratios, and the HPA of the collimators was assessed. Furthermore, a Picker phantom study was performed to examine the effects of the collimators on the quality of planar images. Results It was found that the HEEPCD with an identical resolution to that of HEPCC increased sensitivity by 34.7%, and it improved the trade-off between resolution and sensitivity as well as to eliminate the HPA. In the picker phantom study, the HEEPCD indicated the hot and cold lesions with the higher contrast, lower noise, and higher contrast to noise ratio (CNR). Conclusion Since the HEEPCs modify the shaping of PSFs, they are able to improve the trade-off between the resolution and sensitivity; consequently, planar images can be achieved with higher contrast resolutions. Furthermore, because the HEEPCS reduce the HPA and produce images with a higher CNR, compared to HEPCs, the obtained images by HEEPCs have a higher quality, which can help physicians to provide better diagnosis.
      PubDate: 2017-03-08
      DOI: 10.1007/s12149-017-1160-9
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