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RADIOLOGY AND NUCLEAR MEDICINE (191 journals)                     

Showing 1 - 191 of 191 Journals sorted alphabetically
Abdominal Radiology     Hybrid Journal   (Followers: 21)
Academic Radiology     Hybrid Journal   (Followers: 27)
Acta Cytologica     Hybrid Journal   (Followers: 3)
Acta Radiologica     Hybrid Journal   (Followers: 2)
Acta Radiologica Open     Open Access   (Followers: 3)
Acta Radiológica Portuguesa     Open Access  
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Computed Tomography     Open Access   (Followers: 3)
Advances in Radiation Oncology     Open Access   (Followers: 3)
AINS - Anasthesiologie - Intensivmedizin - Notfallmedizin - Schmerztherapie     Hybrid Journal   (Followers: 5)
Alasbimn Journal     Open Access   (Followers: 2)
American Journal of Neuroradiology     Full-text available via subscription   (Followers: 20)
American Journal of Roentgenology     Full-text available via subscription   (Followers: 34)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 4)
Annals of the ICRP     Hybrid Journal   (Followers: 4)
Applied In Vitro Toxicology     Hybrid Journal   (Followers: 2)
Applied Radiology     Full-text available via subscription   (Followers: 10)
Arab Journal of Interventional Radiology     Open Access   (Followers: 1)
Asia Oceania Journal of Nuclear Medicine & Biology     Open Access   (Followers: 3)
Bangladesh Journal of Nuclear Medicine     Open Access  
Belgian Journal of Radiology     Open Access   (Followers: 3)
Biomedical Imaging and Intervention Journal     Open Access   (Followers: 4)
BJR     Hybrid Journal   (Followers: 21)
BJR | case reports     Open Access   (Followers: 6)
BMC Medical Imaging     Open Access   (Followers: 10)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Cancer Biotherapy & Radiopharmaceuticals     Hybrid Journal   (Followers: 1)
Cancer Radiothérapie     Full-text available via subscription   (Followers: 1)
Case Reports in Radiology     Open Access   (Followers: 12)
Chinese Journal of Academic Radiology     Hybrid Journal  
Clinical and Translational Imaging     Hybrid Journal   (Followers: 1)
Clinical and Translational Radiation Oncology     Open Access   (Followers: 1)
Clinical Imaging     Hybrid Journal   (Followers: 5)
Clinical Mass Spectrometry     Open Access  
Clinical Neuroradiology     Hybrid Journal   (Followers: 3)
Clinical Nuclear Medicine     Hybrid Journal   (Followers: 2)
Clinical Radiology     Hybrid Journal   (Followers: 18)
Computerized Medical Imaging and Graphics     Hybrid Journal   (Followers: 14)
Concepts in Magnetic Resonance Part A     Open Access   (Followers: 1)
Concepts in Magnetic Resonance Part B, Magnetic Resonance Engineering     Open Access   (Followers: 1)
Concussion     Open Access  
Contemporary Diagnostic Radiology     Full-text available via subscription   (Followers: 3)
Contrast Media & Molecular Imaging     Open Access   (Followers: 2)
Critical Ultrasound Journal     Open Access   (Followers: 3)
Current Medical Imaging Reviews     Hybrid Journal   (Followers: 3)
Current Problems in Diagnostic Radiology     Hybrid Journal   (Followers: 10)
Current Radiology Reports     Hybrid Journal   (Followers: 4)
Dentomaxillofacial Radiology     Hybrid Journal   (Followers: 4)
Der Nuklearmediziner     Hybrid Journal  
Der Radiologe     Hybrid Journal   (Followers: 1)
Diagnostic and Interventional Radiology     Open Access   (Followers: 6)
Digestive Disease Interventions     Hybrid Journal  
DNA and RNA Nanotechnology     Open Access   (Followers: 6)
Egyptian Journal of Radiology and Nuclear Medicine     Open Access   (Followers: 1)
EJNMMI Radiopharmacy and Chemistry     Open Access  
Emergency Radiology     Hybrid Journal   (Followers: 8)
Endoscopic Ultrasound     Open Access  
European Journal of Nanomedicine     Hybrid Journal   (Followers: 1)
European Journal of Nuclear Medicine and Molecular Imaging     Hybrid Journal   (Followers: 12)
European Journal of Radiology     Hybrid Journal   (Followers: 21)
European Journal of Radiology Open     Open Access   (Followers: 9)
European Radiology     Hybrid Journal   (Followers: 17)
European Radiology Experimental     Open Access  
European Radiology Supplements     Hybrid Journal   (Followers: 3)
Feuillets de Radiologie     Full-text available via subscription  
Frontiers in Neurogenesis     Open Access   (Followers: 2)
IEEE Transactions on Medical Imaging     Hybrid Journal   (Followers: 28)
IEEE Transactions on Radiation and Plasma Medical Sciences     Hybrid Journal   (Followers: 1)
Imagen Diagnóstica     Full-text available via subscription  
Imaging Decisions MRI     Hybrid Journal   (Followers: 2)
Indian Journal of Nuclear Medicine     Open Access   (Followers: 2)
Indian Journal of Radiology and Imaging     Open Access   (Followers: 4)
Insights into Imaging     Open Access   (Followers: 4)
International Journal of Biomedical Nanoscience and Nanotechnology     Hybrid Journal   (Followers: 8)
International Journal of Computer Assisted Radiology and Surgery     Hybrid Journal   (Followers: 6)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 10)
International Journal of Nanomedicine     Open Access   (Followers: 2)
International Journal of Radiation Biology     Hybrid Journal   (Followers: 6)
International Journal of Tomography & Simulation     Full-text available via subscription   (Followers: 1)
Interventional Neuroradiology     Hybrid Journal   (Followers: 1)
Interventionelle Radiologie Scan     Hybrid Journal   (Followers: 1)
Investigative Radiology     Hybrid Journal   (Followers: 10)
Iranian Journal of Medical Physics     Open Access  
Iranian Journal of Nuclear Medicine     Open Access   (Followers: 1)
Iranian Journal of Radiology     Open Access   (Followers: 5)
Japanese Journal of Radiology     Hybrid Journal   (Followers: 4)
Journal de Radiologie     Full-text available via subscription  
Journal de Radiologie Diagnostique et Interventionnelle     Full-text available via subscription   (Followers: 2)
Journal of Nanomedicine & Nanotechnology     Open Access   (Followers: 1)
Journal of Clinical Imaging Science     Open Access   (Followers: 3)
Journal of Clinical Interventional Radiology ISVIR     Open Access   (Followers: 2)
Journal of Clinical Ultrasound     Hybrid Journal   (Followers: 6)
Journal of Computer Assisted Tomography     Hybrid Journal   (Followers: 1)
Journal of Diagnostic Medical Sonography     Hybrid Journal  
Journal of Diagnostic Radiography and Imaging     Hybrid Journal   (Followers: 4)
Journal of Fetal Medicine     Hybrid Journal  
Journal of Global Radiology     Open Access   (Followers: 2)
Journal of Indian Academy of Oral Medicine and Radiology     Open Access   (Followers: 3)
Journal of Innovative Optical Health Sciences     Open Access  
Journal of Liver : Disease & Transplantation     Hybrid Journal   (Followers: 7)
Journal of Magnetic Resonance     Hybrid Journal   (Followers: 14)
Journal of Magnetic Resonance Imaging     Hybrid Journal   (Followers: 17)
Journal of Medical Imaging     Free   (Followers: 5)
Journal of Medical Imaging and Radiation Oncology     Hybrid Journal   (Followers: 3)
Journal of Medical Imaging and Radiation Sciences     Hybrid Journal   (Followers: 5)
Journal of Medical Radiation Sciences     Open Access   (Followers: 3)
Journal of Neuroradiology     Full-text available via subscription   (Followers: 4)
Journal of Nuclear Medicine     Full-text available via subscription   (Followers: 20)
Journal of Nuclear Medicine & Radiation Therapy     Open Access   (Followers: 3)
Journal of Nucleic Acids Investigation     Open Access   (Followers: 2)
Journal of Oral and Maxillofacial Radiology     Open Access   (Followers: 1)
Journal of Pediatric Neuroradiology     Hybrid Journal   (Followers: 3)
Journal of Radiation and Cancer Research     Open Access  
Journal of Radiation Research     Open Access   (Followers: 3)
Journal of Radiation Research and Applied Sciences     Open Access   (Followers: 2)
Journal of Radiobiology     Open Access   (Followers: 1)
Journal of Radiological Protection     Full-text available via subscription   (Followers: 4)
Journal of Radiology and Oncology     Open Access  
Journal of Radiology Nursing     Hybrid Journal   (Followers: 2)
Journal of Radiosurgery     Hybrid Journal   (Followers: 2)
Journal of Radiotherapy in Practice     Hybrid Journal   (Followers: 7)
Journal of the American College of Radiology     Hybrid Journal   (Followers: 10)
Journal of Thoracic Imaging     Hybrid Journal   (Followers: 3)
Journal of Vascular and Interventional Radiology     Hybrid Journal   (Followers: 13)
La radiologia medica     Hybrid Journal  
Magnetic Resonance Imaging     Hybrid Journal   (Followers: 7)
Magnetic Resonance Imaging Clinics of North America     Full-text available via subscription   (Followers: 8)
Magnetic Resonance in Medicine     Hybrid Journal   (Followers: 16)
Medical Image Analysis     Hybrid Journal   (Followers: 15)
Medical Imaging and Radiology     Open Access   (Followers: 7)
Nepalese Journal of Radiology     Open Access   (Followers: 1)
Neurographics     Free   (Followers: 3)
NeuroImage : Clinical     Open Access   (Followers: 15)
Neuroradiology     Hybrid Journal   (Followers: 9)
Neuroradiology Journal The     Hybrid Journal   (Followers: 1)
Nuclear Medicine and Biology     Hybrid Journal   (Followers: 4)
Nuclear Medicine and Molecular Imaging     Hybrid Journal   (Followers: 4)
Nuclear Medicine Communications     Hybrid Journal   (Followers: 2)
Nuclear Medicine Review     Open Access   (Followers: 2)
Nuklearmedizin / NuclearMedicine     Hybrid Journal  
Open Journal of Clinical Diagnostics     Open Access   (Followers: 1)
Open Journal of Medical Imaging     Open Access   (Followers: 1)
Open Journal of Radiology     Open Access   (Followers: 4)
Open Medical Imaging Journal     Open Access  
Oral Radiology     Hybrid Journal   (Followers: 1)
Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology     Full-text available via subscription   (Followers: 9)
Pediatric Radiology     Hybrid Journal   (Followers: 6)
Physica Medica     Full-text available via subscription   (Followers: 3)
Progress in Nuclear Magnetic Resonance Spectroscopy     Full-text available via subscription   (Followers: 8)
Radiation Protection and Environment     Open Access   (Followers: 1)
Radiatsionnaya Gygiena = Radiation Hygiene     Open Access  
Radiographics     Full-text available via subscription   (Followers: 27)
Radiography     Full-text available via subscription   (Followers: 7)
Radiography Open     Open Access   (Followers: 1)
Radiología     Full-text available via subscription   (Followers: 1)
Radiología (English Edition)     Full-text available via subscription  
Radiologia Brasileira     Open Access  
Radiologic Clinics of North America     Full-text available via subscription   (Followers: 19)
Radiologie up2date     Hybrid Journal   (Followers: 1)
Radiology     Full-text available via subscription   (Followers: 41)
Radiology Case Reports     Open Access   (Followers: 2)
Radiology of Infectious Diseases     Open Access   (Followers: 3)
Radiology Research and Practice     Open Access   (Followers: 3)
Radiopraxis     Hybrid Journal  
Reports in Medical Imaging     Open Access  
Research and Reports in Nuclear Medicine     Open Access   (Followers: 1)
Research Journal of Radiology     Open Access   (Followers: 5)
Revista Argentina de Radiología / Argentinian Journal of Radiology     Open Access  
Revista Chilena de Radiologia     Open Access  
Revista Española de Medicina Nuclear e Imagen Molecular     Full-text available via subscription   (Followers: 2)
Revista Española de Medicina Nuclear e Imagen Molecular (English Edition)     Full-text available via subscription  
Revista Internacional de Ciencias Podológicas     Open Access  
Seminars in Interventional Radiology     Hybrid Journal   (Followers: 6)
Seminars in Musculoskeletal Radiology     Hybrid Journal   (Followers: 6)
Seminars in Nuclear Medicine     Hybrid Journal   (Followers: 5)
Seminars in Roentgenology     Hybrid Journal   (Followers: 3)
Seminars in Ultrasound, CT and MRI     Hybrid Journal   (Followers: 9)
Shadows : The New Zealand Journal of Medical Radiation Technology     Full-text available via subscription   (Followers: 2)
Skeletal Radiology     Hybrid Journal   (Followers: 10)
Solid State Nuclear Magnetic Resonance     Hybrid Journal   (Followers: 3)
South African Journal of Radiology     Open Access   (Followers: 1)
South African Radiographer     Full-text available via subscription  
Sri Lanka Journal of Radiology     Open Access  
Surgical and Radiologic Anatomy     Hybrid Journal   (Followers: 6)
Techniques in Vascular and Interventional Radiology     Full-text available via subscription   (Followers: 8)
Topics in Magnetic Resonance Imaging     Hybrid Journal   (Followers: 3)
Ultraschall in der Medizin - European Journal of Ultrasound     Hybrid Journal   (Followers: 2)
Ultrasonic Imaging     Hybrid Journal   (Followers: 2)
Ultrasound Quarterly     Hybrid Journal   (Followers: 2)
West African Journal of Radiology     Open Access   (Followers: 1)
World Journal of Nuclear Medicine     Open Access   (Followers: 2)

           

Similar Journals
Journal Cover
European Journal of Nuclear Medicine and Molecular Imaging
Journal Prestige (SJR): 2.458
Citation Impact (citeScore): 5
Number of Followers: 12  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1619-7089 - ISSN (Online) 1619-7070
Published by Springer-Verlag Homepage  [2570 journals]
  • Correction to: The 68 Ga/ 177 Lu-theragnostic concept in PSMA-targeting of
           metastatic castration–resistant prostate cancer: impact of
           post-therapeutic whole-body scintigraphy in the follow-up
    • Abstract: The author name Bernhard Nilica was inadvertently interchanged in the original version of this article.
      PubDate: 2020-03-01
       
  • Isolated involvement of thyroid gland by IgG4-related disease revealed by
           18 F-FDG PET/CT
    • PubDate: 2020-03-01
       
  • Letter to the Editor: 18 F-NaF not cited in the EANM practice guideline
           for PET/CT imaging in medullary thyroid carcinoma
    • PubDate: 2020-03-01
       
  • Zirconium-89 labelled rituximab PET-CT imaging of Graves’
           orbitopathy
    • PubDate: 2020-03-01
       
  • ATLAS OF PET-CT, A Quick Guide to Image Interpretation
    • PubDate: 2020-03-01
       
  • Extranodal involvement of multiple organs in diffuse large B cell lymphoma
           detected on 18 F-FDG PET/CT
    • PubDate: 2020-03-01
       
  • Radiology and nuclear medicine: advancing together in the era of precision
           medicine
    • PubDate: 2020-03-01
       
  • 18 F-FDG PET/CT in patients with post-transplant lymphoproliferative
           disorders: so far so good
    • PubDate: 2020-03-01
       
  • 18 F-Fluoride ( 18 F-NaF) PET/CT in medullary thyroid carcinoma: far from
           evidence, far from guidelines!
    • PubDate: 2020-03-01
       
  • Clinicopathologic risk factors of radioactive iodine therapy based on
           response assessment in patients with differentiated thyroid cancer: a
           multicenter retrospective cohort study
    • Abstract: Purpose We investigated whether predictive clinicopathologic factors can be affected by different response criteria and how the clinical usefulness of radioactive iodine (RAI) therapy should be evaluated considering variable factors in patients with differentiated thyroid carcinoma (DTC). Methods A total of 1563 patients with DTC who underwent first RAI therapy after total or near total thyroidectomy were retrospectively enrolled from 25 hospitals. Response to therapy was evaluated with two different protocols based on combination of biochemical and imaging studies: (1) serum thyroglobulin (Tg) and neck ultrasonography (US) and (2) serum Tg, neck US, and radioiodine scan. The responses to therapy were classified into excellent and non-excellent or acceptable and non-acceptable to minimize the effect of non-specific imaging findings. We investigated which factors were associated with response to therapy depending on the follow-up protocols as well as response classifications. Multivariate logistic regression analysis was performed to identify factors significantly predicting response to therapy. Results The proportion of patients in the excellent response group significantly decreased from 76.5 to 59.6% when radioiodine scan was added to the follow-up protocol (P < 0.001). Preparation method (recombinant human TSH vs. thyroid hormone withdrawal) was a significant factor for excellent response prediction evaluated with radioiodine scan (OR 2.129; 95% CI 1.687–2.685; P < 0.001) but was not for other types of response classifications. Administered RAI activity, which was classified as low (1.11 GBq) or high (3.7 GBq or higher), significantly predicted both excellent and acceptable responses regardless of the follow-up protocol. Conclusions The clinical impact of factors related to response prediction differed depending on the follow-up protocol or classification of response criteria. A high administered activity of RAI was a significant factor predicting a favorable response to therapy regardless of the follow-up protocol or classification of response criteria.
      PubDate: 2020-03-01
       
  • Deep neural network for automatic characterization of lesions on 68
           Ga-PSMA-11 PET/CT
    • Abstract: Purpose This study proposes an automated prostate cancer (PC) lesion characterization method based on the deep neural network to determine tumor burden on 68Ga-PSMA-11 PET/CT to potentially facilitate the optimization of PSMA-directed radionuclide therapy. Methods We collected 68Ga-PSMA-11 PET/CT images from 193 patients with metastatic PC at three medical centers. For proof-of-concept, we focused on the detection of pelvis bone and lymph node lesions. A deep neural network (triple-combining 2.5D U-Net) was developed for the automated characterization of these lesions. The proposed method simultaneously extracts features from axial, coronal, and sagittal planes, which mimics the workflow of physicians and reduces computational and memory requirements. Results Among all the labeled lesions, the network achieved 99% precision, 99% recall, and an F1 score of 99% on bone lesion detection and 94%, precision 89% recall, and an F1 score of 92% on lymph node lesion detection. The segmentation accuracy is lower than the detection. The performance of the network was correlated with the amount of training data. Conclusion We developed a deep neural network to characterize automatically the PC lesions on 68Ga-PSMA-11 PET/CT. The preliminary test within the pelvic area confirms the potential of deep learning methods. Increasing the amount of training data should further enhance the performance of the proposed method and may ultimately allow whole-body assessments.
      PubDate: 2020-03-01
       
  • 18 F-PSMA-1007 multiparametric, dynamic PET/CT in biochemical relapse and
           progression of prostate cancer
    • Abstract: Objectives Aim of the present analysis is to investigate the biodistribution and pharmacokinetics of the recently clinically introduced radioligand 18F-PSMA-1007 in patients with biochemical recurrence or progression of prostate cancer (PC) by means of multiparametric (dynamic and whole-body) PET/CT. Methods Twenty-five (25) patients with PC biochemical relapse or progression (median age = 66.0 years) were enrolled in the analysis. The median PSA value was 1.2 ng/mL (range = 0.1–237.3 ng/mL) and the median Gleason score was 7 (range = 6–10). All patients underwent dynamic PET/CT (dPET/CT) scanning (60 min) of the pelvis and lower abdomen as well as whole-body PET/CT with 18F-PSMA-1007. PET/CT assessment was based on qualitative evaluation, SUV calculation, and quantitative analysis based on a two-tissue compartment model and fractal analysis. Results 15/25 patients were PET-positive. Plasma PSA values in the 18F-PSMA-1007 positive group were higher (median = 3.6 ng/mL; range = 0.2–237.3 ng/mL) than in the 18F-PSMA-1007 negative group (median value = 0.7 ng/mL; range = 0.1–3.0 ng/mL). Semi-quantitative analysis in the PC lesions demonstrated a mean SUVaverage = 25.1 (median = 15.4; range = 3.5–119.2) and a mean SUVmax = 41.5 (median = 25.7; range = 3.8–213.2). Time–activity curves derived from dPET/CT revealed an increasing tracer accumulation during the 60 min of dynamic PET acquisition into the PC lesions, higher than in the urinary bladder and the colon. Significant correlations were observed between 18F-PSMA-1007 uptake (SUV), influx, and fractal dimension (FD). Conclusions 18F-PSMA-1007 PET/CT could detect PC lesions in 60% of the patients of a mixed population, including also patients with very low PSA values. Higher PSA values were associated with a higher detection rate. Dynamic PET analysis revealed an increasing tracer uptake during the dynamic PET acquisition as well as high binding and internalization of the radiofluorinated PSMA ligand in the PC lesions.
      PubDate: 2020-03-01
       
  • Errare humanum est, sed in errare perseverare diabolicum: methodological
           errors in the assessment of the relationship between I-131 therapy and
           possible increases in the incidence of malignancies
    • PubDate: 2020-03-01
       
  • Diagnostic performance of FDG-PET/CT of post-transplant
           lymphoproliferative disorder and factors affecting diagnostic yield
    • Abstract: Purpose Post-transplant lymphoproliferative disorder (PTLD) is a serious complication after solid organ and hematopoietic stem cell transplantation, requiring a timely and accurate diagnosis. In this study, we evaluated the diagnostic performance of FDG-PET/CT in patients with suspected PTLD and examined if lactate dehydrogenase (LDH) levels, Epstein-Barr virus (EBV) load, or timing of FDG-PET/CT relate to detection performance of FDG-PET/CT. Methods This retrospective study included 91 consecutive patients with clinical suspicion of PTLD and a total of 97 FDG-PET/CT scans within an 8-year period. Pathology reports and a 2-year follow-up were used as the reference standard. Diagnostic performance of FDG-PET/CT for detection of PTLD as well as logistic regression analysis for factors expected to affect diagnostic yield were assessed. Results The diagnosis of PTLD was established in 34 patients (35%). Fifty-seven FDG-PET/CT scans (59%) were true negative, 29 (30%) were true positive, 6 (6%) false positive, and 5 (5%) false negative. Sensitivity of FDG-PET/CT for the detection of PTLD was 85%, specificity 90%, positive predictive value 83%, and negative predictive value 92%, with good inter-observer variability (k = 0.78). Of the parameters hypothesized to be associated with a true positive FDG-PET/CT result for the diagnosis of PTLD, only LDH was statistically significant (OR 1.03, p = 0.04). Conclusion FDG-PET/CT has a good diagnostic performance in patients suspected of PTLD, with a good inter-observer agreement. Only LDH levels seemed to influence the detection performance of FDG-PET/CT. EBV-DNA load and timing of FDG-PET/CT after transplantation did not affect FDG-PET/CT diagnostic yield.
      PubDate: 2020-03-01
       
  • Variations in radioiodine ablation: decision-making after total
           thyroidectomy
    • Abstract: Background The role of radioiodine treatment following total thyroidectomy for differentiated thyroid cancer is changing. The last major revision of the American Thyroid Association (ATA) Management Guidelines for Patients with Thyroid Nodules and Differentiated Thyroid Cancer in 2015 changed treatment recommendations dramatically in comparison with the European Association of Nuclear Medicine (EANM) 2008 guidelines. We hypothesised that there is marked variability between the different treatment regimens used today. Methods We analysed decision-making in all Swiss hospitals offering radioiodine treatment to map current practice within the community and identify consensus and discrepancies. Results and Conclusion We demonstrated that for low-risk DTC patients after thyroidectomy, some institutions offered only follow-up, while RIT with significant activities is recommended in others. For intermediate- and high-risk patients, radioiodine treatment is generally recommended. Dosing and treatment preparation (recombinant human thyroid stimulation hormone (rhTSH) vs. thyroid hormone withdrawal (THW)) vary significantly among centres.
      PubDate: 2020-03-01
       
  • The 68 Ga/ 177 Lu-theragnostic concept in PSMA-targeting of metastatic
           castration–resistant prostate cancer: impact of post-therapeutic
           whole-body scintigraphy in the follow-up
    • Abstract: Introduction A new therapeutic option for metastatic castration–resistant prostate cancer (mCRPC) of heavily pre-treated patients lies in 177Lu-PSMA-617 radioligand therapy. Methods On the basis of PSMA-targeted 68Ga-PSMA-11 PET/CT, 32 consecutive mCRPC patients were selected for 177Lu-PSMA-617 therapy (6 GBq/cycle, 2 to 6 cycles, 6–10 weeks apart) and followed until death. Post-therapy whole-body (WB) dosimetry and 68Ga-PSMA-11 PET/CT data were compared and related to progression free and overall survival. Results 177Lu-PSMA-617 dosimetry after the first cycle indicated high tumor doses for skeletal (4.01 ± 2.64; range 1.10–13.00 Gy/GBq), lymph node (3.12 ± 2.07; range 0.70–8.70 Gy/GBq), and liver (2.97 ± 1.38; range 0.76–5.00 Gy/GBq) metastases whereas the dose for tissues/organs was acceptable in all patients for an intention-to-treat activity of 24 GBq. Any PSA decrease after the first cycle was found in 23/32 (72%), after the second cycle in 22/32 (69%), after the third cycle in 16/28 (57%), and after the fourth cycle in 8/18 (44%) patients. Post-therapy 24 h WB scintigraphy showed decreased tumor-to-background ratios in 24/32 (75%) after the first therapy cycle, after the second cycle in 17/29 (59%), and after the third cycle in 13/21 (62%) patients. The median PFS was 7 months and the median OS 12 months. In the group of PSA responders (n = 22) the median OS was 17 months versus 11 months in the group of non-responders (n = 10), p < 0.05. Decreasing SUVmax values were found for parotid (15.93 ± 6.23 versus 12.33 ± 4.07) and submandibular glands (17.65 ± 7.34 versus 13.12 ± 4.62) following treatment, along with transient (n = 6) or permanent (n = 2) xerostomia in 8/32 (25%) patients. In 3/32 patients, nephrotoxicity changed from Grade 2 to 3, whereas neither Grade 4 nephrotoxicity nor hematotoxicity was found. In most patients a good agreement was observed for the visual interpretation of the tracer accumulation between 24 h WB and PET/CT scans. However, no significance could be calculated for baseline-absorbed tumor doses and SUVmax values of tumor lesions. 5/32 (16%) patients showed a mixed response pattern, which resulted in disease progression over time. Conclusion Serial PSA measurements and post-therapy 24 h WB scintigraphy seems to allow a sufficiently accurate follow-up of 177Lu-PSMA-617-treated mCRPC patients whereas 68Ga-PSMA-11 PET/CT should be performed for patient selection and final response assessment.
      PubDate: 2020-03-01
       
  • The role of additional late PSMA-ligand PET/CT in the differentiation
           between lymph node metastases and ganglia
    • Abstract: Purpose Differentiating between prostate cancer (PC) lesions and benign structures which exhibit radiotracer uptake in PSMA-ligand PET/CT can be challenging. Additional late imaging has been shown to be a powerful method for the discrimination between PC and non-PC lesions, owing to the increasing tracer uptake of the former. Nevertheless, there are no pre-existing studies which describe the dynamic tracer uptake for ganglia, which this present study aims to address. Methods Fifty consecutive patients with PC who received standard and late 68Ga-PSMA-11-PET/CT (by local protocol at 1.5 h “standard” and 2.5 h p.i. “late”) underwent retrospective evaluation. All lesions with a tracer uptake above local background indicative for ganglia as well as PC lesions were analysed with regard to their maximum standardised uptake values (SUVmax) and localisation. Results Overall, 86 PSMA-positive ganglia were identified in 70% (n = 35) of the patients. Five ganglia exhibited PSMA avidity at late imaging only, and three at standard imaging only. A total of 66 lesions suggestive for PC were detected in 44 patients (88%), of which 45% (n = 30) were morphologically identified as lymph nodes (LN), the remainder being locally recurrent lesions or bone metastases. No solid organ metastases were present in our cohort. At late scanning, 73% of the LN exhibited an increase in SUVmax, whereas 65% of the ganglia exhibited a decreasing or stable SUVmax. Conclusion Whereas the presence of increasing tracer uptake in potential PC lesions can provide additional data about the likelihood of malignancy, increasing SUVmax alone does not reliably differentiate between ganglia and PC lesions and is a potential diagnostic pitfall. We therefore recommend high-resolution CT to enable morphological characterisation of ganglia.
      PubDate: 2020-03-01
       
  • 68 Ga-PSMA-11 PET/CT in patients with recurrent prostate cancer—a
           modified protocol compared with the common protocol
    • Abstract: Purpose 68Ga-PSMA-11 PET/CT is commonly performed at 1 h post injection (p.i.). However, various publications have demonstrated that most prostate cancer (PC) lesions exhibit higher contrast at later imaging. The aim of this study was to compare the “common” protocol of 68Ga-PSMA-11 PET/CT with a modified protocol. Methods In 2017, we used the following scanning protocol for 68Ga-PSMA-11 PET/CT in patients with recurrent PC: acquisition at 1 h p.i. without further preparations. From 2018, all scans were conducted at 1.5 h p.i. In addition, patients were orally hydrated with 1 L of water 0.5 h p.i. and were injected with 20 mg of furosemide 1 h p.i. Both protocols including 112 patients (2017) and 156 (modified protocol in 2018) were retrospectively compared. Rates of pathologic scans, maximum standardized uptake values (SUVmax), and tumor contrast (ratio lesion-SUVmax/background-SUVmean) as well as average standardized uptake values (SUVmean) of urinary bladder were analyzed. Results Both tumor contrast and tracer uptake were significantly (p < 0.001) higher in the novel protocol. Although statistically not significant, the rates of pathologic scans were also higher in the modified protocol: 76.3% vs. 68.8% for all PSA values including 38.9% vs. 25.0% for PSA < 0.5 ng/ml and 60.0% vs. 56.7% for PSA > 0.5–≤ 2.0 ng/ml. Average SUVmean of the urinary bladder was significantly (p < 0.001) lower with the modified protocol. Conclusions The modified protocol, which includes a combination of delayed image acquisition at 1.5 h p.i., hydration, and furosemide resulted in higher tumor contrast and seems to have the potential to increase the rates of pathological scans, especially at low PSA levels.
      PubDate: 2020-03-01
       
  • Digital versus analogue PET in [ 68 Ga]Ga-PSMA-11 PET/CT for recurrent
           prostate cancer: a matched-pair comparison
    • Abstract: Purpose Digital PET/CT scanners represent a significant step forward in molecular imaging. We report here the clinical impact of digital PET in PSMA-PET/CT. Methods In this retrospective study, 88 consecutive patients who underwent [68Ga]Ga-PSMA-11 PET/CT on a digital PET/CT (dPET/CT) scanner for recurrent prostate cancer (PC) were included in a first cohort. In a second step, 88 individuals who underwent an analogue [68Ga]Ga-PSMA-11 PET/CT (aPET/CT) were selected after they were matched to the first cohort for clinical parameters. Following consensus read by two nuclear medicine physicians, the number and type of PC lesions as well as benign, PSMA-positive lesions were recorded. The results were complemented by extensive [68Ga]Ga phantom measurements to determine imaging characteristics of both scanners. Results dPET/CT revealed a greater number of PC lesions compared to aPET/CT (326 versus 142) as well as a proportional increase in benign causes of tracer-uptake (144 versus 65). A greater number of scans were noted as pathological for PC on dPET/CT (74/88) compared to aPET/CT (64/88, p < 0.05). The PSMA positivity rate for PC was significantly higher in dPET/CT for the lowest PSA values (PSA < 2.0 ng/ml, p < 0.05). Conclusion dPET/CT detected more PC lesions compared to aPET/CT. A significantly higher rate of pathological PET/CTs was noted in the group with the lowest PSA values. A higher number of benign PSMA-positive lesions were also noted in dPET/CT. The differences could be plausibly explained by the measured imaging characteristics of the scanners.
      PubDate: 2020-03-01
       
  • Prospective study on the effect of short-term androgen deprivation therapy
           on PSMA uptake evaluated with 68 Ga-PSMA-11 PET/MRI in men with
           treatment-naïve prostate cancer
    • Abstract: Purpose Based on in vitro studies, it is known that androgen deprivation therapy (ADT) increases prostate-specific membrane antigen (PSMA) expression. Therefore, we hypothesised that ADT improves the performance of PSMA-PET imaging in primary staging of prostate cancer. The purpose of the study was to demonstrate the time course effect of ADT on PSMA uptake in different types of metastatic lesions evaluated with 68Ga-PSMA-11 PET/MRI. Methods Nine men with treatment-naïve prostate cancer were enrolled to a prospective, registered (NCT03313726) clinical trial. A 68Ga-PSMA-11 PET/MRI was performed once before and 3 times post-ADT (degarelix, Firmagon). Change of maximum standardised uptake values (SUVmax) in prostate, lymph nodes, bone metastases, and physiologically PSMA-avid organs were evaluated in a time frame of 1–8 weeks. Results All patients reached castration levels within 10 days, and 50% decrease in prostate-specific antigen (PSA) concentration was observed 14 days post-ADT. A heterogeneous increase in PSMA uptake was observed 3 to 4 weeks post-ADT. This phenomenon was definitively more evident in bone metastases: 13 (57%) of the metastasis, with a mean (range) SUVmax increase of 77% (8–238%). In one patient, already having bone metastases at baseline, three new bone metastases were observed post-ADT. Of lesions with reduced SUVmax, none disappeared. Conclusions Both in patient and region level, increase in PSMA uptake post-ADT is heterogenous and is seen most evidently in bone metastases. Preliminary results on a small cohort of patients suggest the clinical impact of ADT on improving the performance of 68Ga-PSMA PET in staging seems to be minor. However, the optimal imaging time point might be 3 to 4 weeks post-ADT. Since none of the metastases with decreasing SUVmax disappeared, it seems that short-term usage of ADT does not interfere with the interpretation of 68Ga-PSMA PET. Trial registration NCT03313726, registered 18 October 2017; EUDRA-CT, 2017-002345-29.
      PubDate: 2020-03-01
       
 
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