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Abdominal Radiology

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https://www.readbyqxmd.com/read/28940042/li-rads-technical-requirements-for-ct-mri-and-contrast-enhanced-ultrasound
#1
Avinash Kambadakone, Alice Fung, Rajan Gupta, Thomas Hope, Kathryn Fowler, Andrej Lyshchik, Karthik Ganesan, Vahid Yaghmai, Alexander Guimaraes, Dushyant Sahani, Frank Miller
Accurate detection and characterization of liver observations to enable HCC diagnosis and staging using LI-RADS requires a technically adequate imaging exam. To help achieve this objective, LI-RADS has proposed technical requirements for CT, MR, and contrast-enhanced ultrasound of liver. This article reviews the technical requirements for liver imaging, including the description of minimum acceptable technical standards, such as the scanner hardware requirements, recommended dynamic imaging phases, and common technical challenges of liver imaging...
September 22, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28939963/quantitative-free-breathing-dynamic-contrast-enhanced-mri-in-hepatocellular-carcinoma-using-gadoxetic-acid-correlations-with-ki67-proliferation-status-histological-grades-and-microvascular-density
#2
Jie Chen, Chenyang Chen, Chunchao Xia, Zixing Huang, Panli Zuo, Alto Stemmer, Bin Song
PURPOSE: To validate a free-breathing dynamic contrast-enhanced-MRI (DCE-MRI) in hepatocellular carcinoma (HCC) patients using gadoxetic acid, and to determine the relationship between DCE-MRI parameters and histological results. METHODS: Thirty-four HCC patients were included in this prospective study. Free-breathing DCE-MRI data was acquired preoperatively on a 3.0 Tesla scanner. Perfusion parameters (K (trans), K ep, V e and the semi-quantitative parameter of initial area under the gadolinium concentration-time curve, iAUC) were calculated and compared with tumor enhancement at contrast-enhanced CT...
September 22, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28939914/erratum-to-multiparametric-magnetic-resonance-imaging-for-transition-zone-prostate-cancer-essential-findings-limitations-and-future-directions
#3
Sara Lewis, Cecilia Besa, Ally Rosen, Ardeshir R Rastinehad, Sahar Semaan, Stefanie Hectors, Bachir Taouli
No abstract text is available yet for this article.
September 22, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936758/mucinous-cystic-neoplasms-of-the-pancreas-high-resolution-cross-sectional-imaging-features-with-clinico-pathologic-correlation
#4
Alejandro Garces-Descovich, Kevin Beker, Manuel Castillo-Angeles, Alexander Brook, Elena Resnick, Shweta Shinagare, Robert M Najarian, Koenraad J Mortele
PURPOSE: To describe the high-resolution cross-sectional (MDCT/MRI) features of mucinous cystic neoplasms (MCN) of the pancreas with clinico-pathologic correlation; to identify imaging predictors of high-grade dysplasia/carcinoma; and to estimate MCN growth rate. MATERIALS AND METHODS: Thirty-two women (mean age: 46; range, 25-79 years) with resected MCN who underwent preoperative MDCT (n = 20) or MRI (n = 12) examinations over a 14-year period were included...
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936724/classics-in-abdominal-imaging-the-putty-kidney
#5
REVIEW
Dana C Galván, Shaked Laks
No abstract text is available yet for this article.
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936631/the-hourglass-sign
#6
REVIEW
Aina Venkatasamy, Tri Thai Huynh, Bénédicte Caron, Francis Veillon
The Hourglass sign is a useful imaging clue for diagnosing diaphragmatic ruptures with viscera herniation on multidetector CT, with a sensitivity ranging from 16% to 63% and a specificity around 98%-100%. This sign is also commonly found in the literature under the name "Collar sign," first described in 1995 by Worthy et al. It refers to the waistlike constriction of the herniated structure at the site of the diaphragmatic rupture.
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936550/feasibility-and-outcomes-of-percutaneous-thermal-ablation-of-hepatocellular-carcinoma-in-a-transplanted-allograft
#7
Brian T Welch, J J Schmitz, A N Kurup, T D Atwell, M R Callstrom, G Frey, R Paz-Fumagalli, A Allen, K Watt, J Heimbach, G D Schmit
PURPOSE: To examine the safety, feasibility, and oncologic control following percutaneous image-guided thermal ablation of hepatocellular carcinoma (HCC) in a transplanted allograft. MATERIALS AND METHODS: Retrospective review was performed to identify patients who underwent liver transplantation for HCC and subsequently underwent percutaneous hepatic thermal ablation for recurrent HCC within the allograft between January 1st, 2000-September 1st, 2016. Eleven patients with hepatic allograft HCC underwent twelve percutaneous thermal ablation procedures to treat 16 lesions...
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936543/us-li-rads-ultrasound-liver-imaging-reporting-and-data-system-for-screening-and-surveillance-of-hepatocellular-carcinoma
#8
Tara A Morgan, Katherine E Maturen, Nirvikar Dahiya, Maryellen R M Sun, Aya Kamaya
Ultrasound is the most widely used imaging tool for hepatocellular carcinoma (HCC) screening and surveillance. Until now, this method has lacked standardized guidelines for interpretation, reporting, and management recommendations [1-5]. To address this need, the American College of Radiology (ACR) has developed the Ultrasound Liver Imaging Reporting and Data System (US LI-RADS) algorithm. The proposed algorithm has two components: detection scores and visualization scores. The detection score guides management and has three categories: US-1 Negative, US-2 Subthreshold, and US-3 Positive...
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28936542/efficacy-of-percutaneous-radiofrequency-ablation-may-vary-with-clear-cell-renal-cell-cancer-histologic-subtype
#9
Timothy McClure, Allan Pantuck, James Sayer, Steven Raman
PURPOSE: The purpose of the study is to determine if clear cell renal cell cancer (RCC) subtype predicts efficacy in percutaneous radiofrequency (RF) ablation of RCC. METHODS AND MATERIALS: Patients who underwent percutaneous RF ablation for histologically proven RCC subtypes were retrospectively reviewed. Group comparisons were done using univariate and multivariate logistic regression analysis to determine factors impacting primary, secondary, and total technique effectiveness...
September 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28929218/percutaneous-gastric-remnant-gastrostomy-following-roux-en-y-gastric-bypass-surgery-a-single-tertiary-center-s-13-year-experience
#10
Shehbaz Hasam Shaikh, Justin Jay Stenz, David W McVinnie, James J Morrison, Todd Getzen, Arthur M Carlin, Farhaan R Mir
PURPOSE: The purpose of the study is to evaluate the indications, techniques, and outcomes for percutaneous gastrostomy placement in the gastric remnant following Roux-en-Y gastric bypass (RYGB) in bariatric patients. MATERIALS AND METHODS: Retrospective chart review and summary statistical analysis was performed on all RYGB patients that underwent attempted percutaneous remnant gastrostomy placement at our institution between April 2003 and November 2016. RESULTS: A total of 38 patients post-RYGB who underwent gastric remnant gastrostomy placement were identified, 32 women and 6 men, in which a total of 41 procedures were attempted...
September 19, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28929197/venous-invasion-by-hepatic-tumors-imaging-appearance-and-implications-for-management
#11
REVIEW
Scott M Thompson, Michael L Wells, James C Andrews, Eric C Ehman, Christine O Menias, Christopher L Hallemeier, Lewis R Roberts, Sudhakar K Venkatesh
Venous invasion by hepatic tumors most commonly occurs with hepatocellular carcinoma and is associated with worse patient prognosis. Imaging plays an important role in the diagnosis of tumor thrombus in the liver. Moreover, differentiating between bland and tumor thrombus in the liver has important diagnostic, staging, therapeutic, and prognostic implications and may require a multimodal imaging approach including ultrasound, computed tomography, and/or magnetic resonance imaging. Treatment of hepatic malignancies with associated tumor thrombus is dependent on tumor type, disease extent within the liver, liver hemodynamics, and underlying liver function...
September 19, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28929196/percutaneous-liver-biopsy-and-revised-coagulation-guidelines-a-9-year-experience
#12
Douglas R Kitchin, Alejandro Munoz Del Rio, Michael Woods, Lucas Ludeman, J Louis Hinshaw
PURPOSE: To retrospectively review revised pre-procedural coagulation guidelines for percutaneous liver biopsy to determine whether their implementation is associated with increased hemorrhagic complications on a departmental scale. Secondary endpoints were to determine the effect of this change on pre-procedural blood product (FFP and platelet) utilization, to evaluate the impact of administered blood products on hemorrhagic complications, and to determine whether bleeding complications were related to INR and platelet levels...
September 19, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28900703/utility-of-18-f-fdg-pet-ct-and-cect-in-conjunction-with-serum-ca-19-9-for-detecting-recurrent-pancreatic-adenocarcinoma
#13
Sampanna Rayamajhi, Aparna Balachandran, Mathew Katz, Arun Reddy, Eric Rohren, Priya Bhosale
PURPOSE: The roles of different cross-sectional imaging in evaluating the recurrence of pancreatic adenocarcinoma are not well established. We evaluated the utility of (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) and contrast-enhanced computed tomography (CECT) in the diagnosis of recurrent pancreatic adenocarcinoma in conjunction with the tumor marker CA 19-9. METHODS: We retrospectively reviewed the records of patients who underwent CECT and FDG PET/CT along with serum CA 19-9 measurement as a follow-up or on a clinical suspicion of recurrent disease after initial surgery for pancreatic adenocarcinoma...
September 12, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28900696/a-systematic-approach-to-adnexal-masses-discovered-on-ultrasound-the-adnex-mr-scoring-system
#14
REVIEW
Elizabeth A Sadowski, Jessica B Robbins, Andrea G Rockall, Isabelle Thomassin-Naggara
Adnexal lesions are a common occurrence in radiology practice and imaging plays a crucial role in triaging women appropriately. Current trends toward early detection and characterization have increased the need for accurate imaging assessment of adnexal lesions prior to treatment. Ultrasound is the first-line imaging modality for assessing adnexal lesions; however, approximately 20% of lesions are incompletely characterized after ultrasound evaluation. Secondary assessment with MR imaging using the ADNEx MR Scoring System has been demonstrated as highly accurate in the characterization of adnexal lesions and in excluding ovarian cancer...
September 12, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28884370/diagnosis-of-gastrogastric-fistula-on-computed-tomography-a-quantitative-approach
#15
Guangzu Gao, Nariman Nezami, Mahan Mathur, Patricia Balcacer, Gary Israel, Michael Spektor
OBJECTIVE: To determine if the attenuation of contrast material in the excluded stomach compared with the gastric pouch is helpful in diagnosing gastrogastric (GG) fistula. MATERIALS AND METHODS: In a retrospective study, 13 CT scans in 12 patients (age 43.2 ± 9.2, 10 females) who had undergone Roux-en-Y gastric bypass and who had oral contrast in both the gastric pouch and excluded stomach were qualitatively and quantitatively evaluated for GG fistula by two radiologists, using upper GI series (UGI) as the gold standard...
September 8, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28879418/thread-like-calcifications-in-mesenteric-phlebosclerosis
#16
REVIEW
Yan-Lin Li, Kenneth Kai-Yat Cheung
No abstract text is available yet for this article.
September 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28871465/the-crossing-duct-sign
#17
REVIEW
Yan-Lin Li, Man-Leung Yu, Kam-Ho Lee
Pancreas divisum is a common variation in pancreatic ductal anatomy present in up to 10% of the population with variable clinical importance. The crossing duct sign refers to the appearance of dominant dorsal duct crossing the intrapancreatic common bile duct to empty into the minor papilla, best illustrated on maximum intensity projection images from MRCP.
September 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28871393/t1-vs-t2-weighted-magnetic-resonance-imaging-to-assess-total-kidney-volume-in-patients-with-autosomal-dominant-polycystic-kidney-disease
#18
Maatje D A van Gastel, A Lianne Messchendorp, Peter Kappert, Merel A Kaatee, Marissa de Jong, Remco J Renken, Gert J Ter Horst, Shekar V K Mahesh, Ron T Gansevoort
PURPOSE: In ADPKD patients total kidney volume (TKV) measurement using MRI is performed to predict rate of disease progression. Historically T1 weighted images (T1) were used, but the methodology of T2 weighted imaging (T2) has evolved. We compared the performance of both sequences. METHODS: 40 ADPKD patients underwent an abdominal MRI at baseline and follow-up. TKV was measured by manual tracing with Analyze Direct 11.0 software. Three readers established intra- and interreader coefficients of variation (CV)...
September 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28871380/mri-of-anal-canal-common-anal-and-perianal-disorders-beyond-fistulas-part-2
#19
REVIEW
Ayşe Erden
A broad spectrum of disease, from benign processes to life-threatening pathologies, can cause anal pain. MR imaging (MRI) has become increasingly widely used method over the past two decades for the evaluation of individuals with anorectal symptoms. Although imaging is rarely necessary to determine the etiology of the majority of cases, MRI is particularly useful as a noninvasive method of excluding severe neoplastic conditions. In this article, MRI findings of a number of pathologies such as anal and perianal neoplasms, hemorrhoidal disease, arteriovenous malformation of the perianal region, and anal sphincter lesions (defects, scarring, atrophy) which may lead to fecal incontinence are presented...
September 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28861631/unenhanced-magnetic-resonance-imaging-immediately-after-radiofrequency-ablation-of-liver-malignancy-preliminary-results
#20
Mirko D'Onofrio, Nicolò Cardobi, Andrea Ruzzenente, Simone Conci, Valentina Ciaravino, Alfredo Guglielmi, Roberto Pozzi Mucelli
PURPOSE: To assess the accuracy of unenhanced magnetic resonance imaging (MRI) immediately after the percutaneous ultrasound-guided radiofrequency ablation (RFA) of liver malignancy in predicting treatment efficacy at CT follow-up. MATERIALS AND METHODS: Percutaneous ablation was prospectively performed in 23 liver malignancies (20 hepatocarcinomas and 3 metastases). After the procedure in the same day all patients were studied with unenhanced MRI. The best sequence to detect the coagulative necrosis was visually established...
August 31, 2017: Abdominal Radiology
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