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Abdominal Radiology

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https://www.readbyqxmd.com/read/28213826/diagnostic-yield-of-ct-urography-in-the-evaluation-of-hematuria-in-young-patients-in-a-military-population
#1
Laura R Mace, Terrel L Galloway, Andrew Ma, Richard S Montgomery, Ryan C Rockhill, William W Reynolds, Robert M Marks
PURPOSE: To assess the diagnostic yield of a computed tomography urography (CTU) study in patients less than 50 years of age, who have a history of military service, and who are at increased risk of urological cancers secondary to harmful practices and work-related exposures. METHODS: 137 Consecutive patients who underwent CTU between 2012 and 2013 for new onset of hematuria were included. Initial review of the clinical interpretations of the CTU studies grouped the studies into negative and positive exams for any urological findings...
February 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28210767/crohn-s-disease-diagnosis-treatment-approach-and-management-paradigm-what-the-radiologist-needs-to-know
#2
Parakkal Deepak, Sang Hyoung Park, Eric C Ehman, Stephanie L Hansel, Jeff L Fidler, David H Bruining, Joel G Fletcher
Crohn's disease is one of the major subtypes of idiopathic inflammatory bowel disease and is characterized by chronic transmural intestinal inflammation of the gastrointestinal tract anywhere from mouth to the anus, with a predilection for the small bowel. Cross-sectional imaging with computed tomography and magnetic resonance enterography plays a key role in confirming diagnosis, identifying and managing complications, assessing disease severity, and identifying response to medical therapy. This review will focus on the role of radiologists in the diagnosis and assessment of Crohn's disease...
February 16, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28204855/parametric-response-mapping-of-dynamic-ct-enhanced-prediction-of-survival-in-hepatocellular-carcinoma-patients-treated-with-transarterial-chemoembolization
#3
Seung Joon Choi, Jonghoon Kim, Hyung Sik Kim, Hyunjin Park
PURPOSE: The aim of this study was to evaluate the prognostic significance of parametric response mapping (PRM) analysis for hepatocellular carcinoma (HCC) patients undergoing transarterial chemoembolization (TACE). METHODS: We recruited 65 HCC patients who underwent TACE. These patients underwent longitudinal multiphasic CT before and after TACE. We applied PRM analysis to the baseline CT before TACE and first/second follow-up CTs. The results of PRM analyses were used to stratify patients into responders and non-responders...
February 15, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28197683/aorta-lesion-attenuation-difference-alad-on-contrast-enhanced-ct-a-potential-imaging-biomarker-for-differentiating-malignant-from-benign-oncocytic-neoplasms
#4
Manish Dhyani, Joseph R Grajo, Dayron Rodriguez, Zhikui Chen, Adam Feldman, Rosemary Tambouret, Debra A Gervais, Ronald S Arellano, Peter F Hahn, Anthony E Samir
OBJECTIVE: To evaluate whether the Aorta-Lesion-Attenuation-Difference on contrast-enhanced CT can aid in the differentiation of malignant and benign oncocytic renal neoplasms. MATERIALS AND METHODS: Two independent cohorts-an initial (biopsy) dataset and a validation (surgical) dataset-with oncocytomas and chromophobe renal cell carcinomas (chRCC) were included in this IRB-approved retrospective study. A region of interest was placed on the renal mass and abdominal aorta on the same CT image slice to calculate an Aorta-Lesion-Attenuation-Difference (ALAD)...
February 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28197682/intraperitoneal-metastases-after-transarterial-embolization-of-hepatocellular-carcinoma-an-observational-study
#5
Jeffrey M Meier, Spencer C Behr, Eric Jordan, K Pallav Kolli, Benjamin M Yeh
PURPOSE: Transarterial embolization is frequently used to treat local hepatocellular carcinoma (HCC). While various complications are known to occur following transarterial embolization, only one prior case of peritoneal spread of HCC occurring shortly after transarterial chemoembolization has been reported. We present five cases of peritoneal spread of HCC following transarterial embolization (including bland embolization, conventional transarterial chemoembolization (TACE), and doxorubicin-eluting beads TACE) and identify features common among those cases...
February 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28197681/introduction-to-special-celiac-section
#6
Jeff L Fidler
No abstract text is available yet for this article.
February 14, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28194515/genital-and-reproductive-organ-complications-of-crohn-disease-technical-considerations-as-it-relates-to-perianal-disease-imaging-features-and-implications-on-management
#7
REVIEW
Steven Kammann, Christine Menias, Amy Hara, Mariam Moshiri, Cary Siegel, Bashar Safar, Steven Brandes, Akram Shaaban, Kumar Sandrasegaran
OBJECTIVE: A relatively large proportion of patients with Crohn disease (CD) develop complications including abscess formation, stricture, and penetrating disease. A subset of patients will have genital and reproductive organ involvement of CD, resulting in significant morbidity. These special circumstances create unique management challenges that must be tailored to the activity, location, and extent of disease. Familiarity with the epidemiology, pathogenesis, imaging features, and treatment strategies for patients with genital CD can aid imaging diagnoses and guide appropriate patient management...
February 13, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28194514/a-prospective-comparison-between-auto-registration-and-manual-registration-of-real-time-ultrasound-with-mr-images-for-percutaneous-ablation-or-biopsy-of-hepatic-lesions
#8
Dong Ik Cha, Min Woo Lee, Kyoung Doo Song, Young-Taek Oh, Ja-Yeon Jeong, Jung-Woo Chang, Jiwon Ryu, Kyong Joon Lee, Jaeil Kim, Won-Chul Bang, Dong Kuk Shin, Sung Jin Choi, Dalkwon Koh, Bong Koo Seo, Kyunga Kim
PURPOSE: To compare the accuracy and required time for image fusion of real-time ultrasound (US) with pre-procedural magnetic resonance (MR) images between positioning auto-registration and manual registration for percutaneous radiofrequency ablation or biopsy of hepatic lesions. METHODS: This prospective study was approved by the institutional review board, and all patients gave written informed consent. Twenty-two patients (male/female, n = 18/n = 4; age, 61...
February 13, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28194513/clinical-use-of-mri-for-the-evaluation-of-acute-appendicitis-during-pregnancy
#9
Darshan Patel, Jordan Fingard, Sean Winters, Gavin Low
PURPOSE: The purpose of this study was to determine the diagnostic accuracy of MRI for detecting acute appendicitis in pregnancy in a multi-institution study involving general body MR readers with no specific expertise in MR imaging of the pregnant patient. METHODS: Retrospective review of MRI examinations on PACS in 42 pregnant patients was evaluated for acute right lower quadrant pain. Three fellowship-trained general body radiologists analyzed the MRI examinations in consensus and attempted to localize the appendix, assess for features of appendicitis, and exclude alternative etiologies for the right lower quadrant pain...
February 13, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28188322/tennis-ball-sign-a-ct-sign-of-acute-aortic-dissection
#10
REVIEW
Hira Lal, Priyank Yadav, Anand Chellappan, Rajeev Singh
No abstract text is available yet for this article.
February 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28184961/renal-mass-biopsy-and-thermal-ablation-should-biopsy-be-performed-before-or-during-the-ablation-procedure
#11
Shane A Wells, Vincenzo K Wong, Tyler A Wittmann, Meghan G Lubner, Sara L Best, Timothy J Ziemlewicz, J Louis Hinshaw, Fred T Lee, E Jason Abel
PURPOSE: To determine if renal mass biopsy should be performed before or during the ablation procedure with emphasis on complications and rate of ablation for renal cell carcinomas (RCC), benign tumors, and small renal masses without a histologic diagnosis. METHODS: This HIPAA-compliant, single-center retrospective study was performed under a waiver of informed consent from the institutional review board. Two hundred eighty-four consecutive patients with a small renal mass (≤4...
February 9, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28180924/ct-based-radiomics-signature-a-potential-biomarker-for-preoperative-prediction-of-early-recurrence-in-hepatocellular-carcinoma
#12
Ying Zhou, Lan He, Yanqi Huang, Shuting Chen, Penqi Wu, Weitao Ye, Zaiyi Liu, Changhong Liang
PURPOSE: To develop a CT-based radiomics signature and assess its ability for preoperatively predicting the early recurrence (≤1 year) of hepatocellular carcinoma (HCC). METHODS: A total of 215 HCC patients who underwent partial hepatectomy were enrolled in this retrospective study, and all the patients were followed up at least within 1 year. Radiomics features were extracted from arterial- and portal venous-phase CT images, and a radiomics signature was built by the least absolute shrinkage and selection operator (LASSO) logistic regression model...
February 8, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28180923/early-assessment-of-coagulation-necrosis-after-hepatic-microwave-ablation-a-comparison-of-non-enhanced-and-enhanced-t1-weighted-images
#13
Zhen-Yu Jia, Qi-Feng Chen, Zheng-Qiang Yang, Wen-Tao Wu, Hai-Bin Shi, Sheng Liu
PURPOSE: To compare the technical success and accuracy of hepatic microwave ablation (MWA) using non-enhanced and enhanced T1-weighted imaging early after ablation. Patients were evaluated with regard to the ablation zone and local tumor progression (LTP). METHODS: This retrospective study conducted between September 2014 and December 2015 which consisted of 56 patients with 56 hepatic malignant lesions who underwent percutaneous MWA. Non-enhanced and contrast-enhanced T1-weighted imagings were performed within 2 days after tumor ablation...
February 8, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28161826/assessment-of-prostate-cancer-aggressiveness-using-apparent-diffusion-coefficient-values-impact-of-patient-race-and-age
#14
Tsutomu Tamada, Vinay Prabhu, Jianhong Li, James S Babb, Samir S Taneja, Andrew B Rosenkrantz
PURPOSE: To assess the impact of patient race and age on the performance of apparent diffusion coefficient (ADC) values for assessment of prostate cancer aggressiveness. MATERIALS AND METHODS: 457 prostate cancer patients who underwent 3T phased-array coil prostate MRI including diffusion-weighted imaging (DWI; maximal b-value 1000 s/mm(2)) before prostatectomy were included. Mean ADC of a single dominant lesion was measured in each patient, using histopathologic findings from the prostatectomy specimen as reference...
February 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28161825/correlation-between-kras-mutation-and-18-f-fdg-uptake-in-stage-iv-colorectal-cancer
#15
Arthur Cho, Kwanhyeong Jo, Sang Hyun Hwang, Narae Lee, Minkyu Jung, Mijin Yun, Hee Sung Hwang
PURPOSE: The purpose of this study is to evaluate the correlation between KRAS mutation, (18)F-FDG uptake, and metastatic pattern in advanced stage colorectal cancer (CRC) patients. METHODS: Medical records of stage IV CRC patients who underwent (18)F-FDG PET/CT for staging and KRAS mutation analysis were selected. On PET scans, a volume of interest (VOI) was drawn on the primary lesion. (18)F-FDG indices (SUVmax, SUVmean, MTV, TLG) of the primary lesions were obtained and correlated with KRAS mutation of the primary lesion...
February 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28161824/a-three-dimensional-visualization-preoperative-treatment-planning-system-for-microwave-ablation-in-liver-cancer-a-simulated-experimental-study
#16
Fangyi Liu, Zhigang Cheng, Zhiyu Han, Xiaoling Yu, Mingan Yu, Ping Liang
PURPOSE: To evaluate the application value of three-dimensional (3D) visualization preoperative treatment planning system (VPTPS) for microwave ablation (MWA) in liver cancer. MATERIALS AND METHODS: The study was a simulated experimental study using the CT imaging data of patients in DICOM format in a model. Three students (who learn to interventional ultrasound for less than 1 year) and three experts (who have more than 5 years of experience in ablation techniques) in MWA performed the preoperative planning for 39 lesions (mean diameter 3...
February 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28160039/measuring-the-apparent-diffusion-coefficient-in-primary-rectal-tumors-is-there-a-benefit-in-performing-histogram-analyses
#17
Miriam M van Heeswijk, Doenja M J Lambregts, Monique Maas, Max J Lahaye, Z Ayas, Jos M G M Slenter, Geerard L Beets, Frans C H Bakers, Regina G H Beets-Tan
PURPOSE: The apparent diffusion coefficient (ADC) is a potential prognostic imaging marker in rectal cancer. Typically, mean ADC values are used, derived from precise manual whole-volume tumor delineations by experts. The aim was first to explore whether non-precise circular delineation combined with histogram analysis can be a less cumbersome alternative to acquire similar ADC measurements and second to explore whether histogram analyses provide additional prognostic information. METHODS: Thirty-seven patients who underwent a primary staging MRI including diffusion-weighted imaging (DWI; b0, 25, 50, 100, 500, 1000; 1...
February 3, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28160038/biliary-and-pancreatic-complications-of-molecular-targeted-therapies-in-cancer-imaging
#18
REVIEW
Francesco Alessandrino, Katherine M Krajewski, Sree Harsha Tirumani, Marta Braschi-Amirfarzan, Jyothi P Jagannathan, Nikhil H Ramaiya, Donald N Di Salvo
The purpose of this review is to familiarize radiologists with the different imaging manifestations of biliary and pancreatic toxicity of molecular targeted therapies. The advent of molecular targeted therapies for cancer treatment has prompted radiologists to be familiar with these new molecules, their patterns of response, and their class-specific toxicities. While liver and bowel toxicities have been extensively reported in literature, less is known about the pathogenesis and imaging of toxicity involving the pancreatobiliary system...
February 3, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28154911/comparative-performance-of-non-contrast-mri-with-haste-vs-contrast-enhanced-mri-3d-mrcp-for-possible-choledocholithiasis-in-hospitalized-patients
#19
Stella K Kang, Laura Heacock, Ankur M Doshi, Justin R Ream, Jeffrey Sun, James S Babb
PURPOSE: To compare the performance of non-contrast MRI with half-Fourier acquisition single-shot turbo spin echo (HASTE) vs. contrast-enhanced MRI/3D-MRCP for assessment of suspected choledocholithiasis in hospitalized patients. METHODS AND MATERIALS: 123 contrast-enhanced abdominal MRI/MRCP scans in the hospital setting for possible choledocholithiasis were retrospectively evaluated. Endoscopic retrograde cholangiopancreatography, intraoperative cholangiogram or documented clinical resolution served as the reference standard...
February 2, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28154910/value-of-tumor-stiffness-measured-with-mr-elastography-for-assessment-of-response-of-hepatocellular-carcinoma-to-locoregional-therapy
#20
Sonja Gordic, Jad Bou Ayache, Paul Kennedy, Cecilia Besa, Mathilde Wagner, Octavia Bane, Richard L Ehman, Edward Kim, Bachir Taouli
PURPOSE: The aim of the study was to correlate tumor stiffness (TS) measured with MR elastography (MRE) with degree of tumor enhancement and necrosis on contrast-enhanced T1-weighted imaging (CE-T1WI) in hepatocellular carcinomas (HCC) treated with Yttrium-90 radioembolization (RE) or transarterial chemoembolization plus radiofrequency ablation (TACE/RFA). MATERIAL AND METHODS: This retrospective study was IRB-approved and the requirement for informed consent was waived...
February 2, 2017: Abdominal Radiology
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