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Journal Cover   Acta Radiologica Short Reports
  [1 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2047-9816 - ISSN (Online) 2047-9816
   Published by Sage Publications Homepage  [814 journals]
  • Improvement of cerebral hypometabolism after resection of
           radiation-induced necrotic lesion in a patient with cerebral arteriovenous
           malformation

    • Authors: Harada, Y; Hirata, K, Nakayama, N, Yamaguchi, S, Yoshida, M, Onodera, S, Manabe, O, Shiga, T, Terae, S, Shirato, H, Tamaki, N.
      Pages: 2058460115 - 2058460115
      Abstract: A 55-year-old woman underwent radiosurgery for a left cerebral hemisphere arteriovenous malformation (AVM) and developed radiation-induced necrosis causing a massive edema in the surrounding brain tissues. Despite various therapies, the edema expanded to the ipsilateral hemisphere and induced neurological symptoms. The radiation-induced necrotic lesion was surgically removed 4 years after radiosurgery. While the preoperative FDG PET revealed severe hypometabolism in the left cerebrum, the necrotomy significantly ameliorated the brain edema, glucose metabolism (postoperative FDG PET), and symptoms. This case indicates that radiation necrosis-induced neurological deficits may be associated with brain edema and hypometabolism, which could be reversed by appropriate necrotomy.
      PubDate: 2015-06-29T01:25:31-07:00
      DOI: 10.1177/2058460115584112
      Issue No: Vol. 4, No. 6 (2015)
       
  • Effects of contour propagation and background corrections in different MRI
           flow software packages

    • Authors: Boye, D; Springer, O, Wassmer, F, Scheidegger, S, Remonda, L, Berberat, J.
      Pages: 2058460115 - 2058460115
      Abstract: Background Velocity-encoded magnetic resonance imaging (VENC-MRI) is a commonly used technique in cardiac examinations. This technique utilizes the phase shift properties of protons moving along a magnetic field gradient. VENC-MRI offers a unique way of measuring the severity of valve regurgitation by directly quantifying the regurgitation flow volume. Purpose To compare flow analysis results of different software programs and to assess the effect of background correction in sample patient cases. Material and Methods A phantom was built out of Polymethyl methacrylate (PMMA) which provides tubes of different diameters. These tubes can be connected to an external water circuit to generate a water flow inside the tubes. Expected absolute flow quantities inside the tubes were determined from preset tube- and flow-parameters. Different flow conditions were measured with a VENC-MRI sequence and the images evaluated using different software packages. In a second step six randomly selected patients showing different degrees of aortic insufficiency were evaluated in clinical terms. Results The contour propagation algorithms used in the software packages performed differently even on static phantom geometry. In terms of clinical evaluation the software packages performed similarly. Enabling background correction or leaving out manual correction of propagated contours changed results for severity of aortic insufficiency. Conclusion Turning on background correction and manual correction of propagated contours in MRI flow volume measurements is strongly recommended.
      PubDate: 2015-06-26T08:03:55-07:00
      DOI: 10.1177/2058460115589124
      Issue No: Vol. 4, No. 6 (2015)
       
  • Contrast-induced nephropathy in patients with chronic kidney disease and
           peripheral arterial disease

    • Authors: Kroneberger, C; Enzweiler, C. N, Schmidt-Lucke, A, Ruckert, R.-I, Teichgraber, U, Franiel, T.
      Pages: 2058460115 - 2058460115
      Abstract: Background The risk for contrast-induced nephropathy (CIN) after intra-arterial application of an iodine-based contrast material is unknown for patients with chronic kidney disease (CKD) and peripheral arterial disease (PAD). Purpose To investigate the incidence of CIN in patients with CKD and PAD. Material and Methods This retrospective study was approved by the local ethics committee. One hundred and twenty patients with 128 procedures (73 with baseline eGFR in the range of 45–60 mL/min/1.73m2, 55 with eGFR < 45 mL/min/1.73m2) were evaluated. All patients received intra-arterially an iodine-based low-osmolar contrast material (CM) after adequate intravenous hydration with isotonic NaCl 0.9% solution. CIN was defined as an increase in serum creatinine of more than 44 μmol/L within 4 days. The influence of patient-related risk factors (age, weight, body mass index, eGFR, serum creatinine, hypertension, diabetes mellitus, coronary heart disease, heart failure) and therapy-related risk factors (amount of CM, nephrotoxic drugs, number of CM applications) on CIN were examined. Results CIN developed in 0% (0/73) of procedures in patients with PAD and an eGFR in the range of 45–60 mL/min/1.73m2 and in 10.9% (6/55) of procedures in patients with an eGFR
      PubDate: 2015-06-25T00:57:43-07:00
      DOI: 10.1177/2058460115583034
      Issue No: Vol. 4, No. 6 (2015)
       
  • Stent-graft treatment for extrahepatic portal vein hemorrhage after
           pancreaticoduodenectomy

    • Authors: Suzuki, K; Igami, T, Komada, T, Mori, Y, Yokoyama, Y, Ebata, T, Naganawa, S, Nagino, M.
      Pages: 2058460115 - 2058460115
      Abstract: We report a case of intraperitoneal hemorrhage from the extrahepatic portal vein after pancreaticoduodenectomy for distal bile duct carcinoma. A stent-graft was deployed from the superior mesenteric vein to the main portal vein using a transhepatic approach. After the procedure, the patient remained free of intraperitoneal hemorrhage and was discharged 2 months later.
      PubDate: 2015-06-19T02:54:27-07:00
      DOI: 10.1177/2058460115589338
      Issue No: Vol. 4, No. 6 (2015)
       
  • Diagnostic accuracy of three different MRI protocols in patients with
           inflammatory bowel disease

    • Authors: Jesuratnam-Nielsen, K; Logager, V. B, Munkholm, P, Thomsen, H. S.
      Pages: 2058460115 - 2058460115
      Abstract: Background Magnetic resonance imaging (MRI) is used for workup and control of inflammatory bowel disease (IBD); however, disagreement remains as to how the MRI should be performed. Purpose To compare prospectively the diagnostic accuracy of MRI with neither oral nor intravenous contrast medium (plain MRI), magnetic resonance follow-through (MRFT) and MR enteroclysis (MRE) using MRE as the reference standard in patients with inflammatory bowel disease. Material and Methods Plain MRI and MRE were carried out in addition to MRFT. All patients underwent both plain MR and MRFT on the same day and MRE within seven days. For the evaluation, the bowel was divided into nine segments. One radiologist, blinded to clinical findings, evaluated bowel wall thickness, diffusion weighted imaging (DWI), mural hyperenhancement, and other inflammatory changes in each bowel segment. Results Twenty patients (6 men, 14 women; median age, 43.5 years; age range, 26–76 years) underwent all three examinations; 10 with Crohn’s disease (CD), three with ulcerative colitis (UC), and seven with IBD unclassified (IBD-U). Sensitivity, specificity, and accuracy were in the range of 0–75%, 81–96%, and 75–95% for wall thickening, and 0–37%, 59–89%, and 50–86% for DWI in plain MRI, respectively. Sensitivity, specificity, and accuracy were in the range of 0–50%, 96–100%, and 90–100% for wall thickening, 0–50%, 84–97%, and 82–95% for DWI, and 0–71%, 94–100%, and 85–100% for mural hyperenhancement in MRFT, respectively. Conclusion The use of oral and intravenous contrast agent improves detection of bowel lesions resulting in MRFT remaining the superior choice over plain MRI for diagnostic workup in patients with IBD.
      PubDate: 2015-06-11T03:40:16-07:00
      DOI: 10.1177/2058460115588099
      Issue No: Vol. 4, No. 6 (2015)
       
 
 
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