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Abdominal Radiology

Seung Hyun Park, Young Taik Oh, Dae Chul Jung, Nam Hoon Cho, Young Deuk Choi, Sung Yoon Park
PURPOSE: We analyzed radiologic and histologic characteristics, and prognosis of abdominal seeding from renal cell carcinoma (RCC). METHODS: Consecutive 25 patients with RCC and histologically or radiologically diagnosed abdominal seeding were analyzed. No patient had another type of malignancy. Histologic subtype, Fuhrman grade, sarcomatoid differentiation, and T-stage of primary tumors were assessed. Pre- or postoperative presentation of seeding was investigated...
January 13, 2017: Abdominal Radiology
Lakshmi Ananthakrishnan, Prabhakar Rajiah, Richard Ahn, Negin Rassouli, Yin Xi, Todd C Soesbe, Matthew A Lewis, Robert E Lenkinski, John R Leyendecker, Suhny Abbara
PURPOSE: To assess virtual non-contrast (VNC) images obtained on a detection-based spectral detector CT scanner and determine how attenuation on VNC images derived from various phases of enhanced CT compare to those obtained from true unenhanced images. METHODS: In this HIPAA compliant, IRB approved prospective multi-institutional study, 46 patients underwent pre- and post-contrast imaging on a prototype dual-layer spectral detector CT between October 2013 and November 2015, yielding 84 unenhanced and VNC pairs (25 arterial, 39 portal venous/nephrographic, 20 urographic)...
January 13, 2017: Abdominal Radiology
Badr Al-Bawardy, John M Barlow, Rogerio N Vasconcelos, Sarasa T Kim, David H Bruining, Stephanie L Hansel, Shannon P Sheedy, Joseph A Murray, Alberto Rubio-Tapia, Elizabeth Rajan, Jeff L Fidler, Joel G Fletcher
PURPOSE: The purpose of this study is to identify unique imaging findings of refractory celiac disease (RCD) including Type I RCD, Type II RCD versus healed celiac disease (CD). METHODS: A retrospective study of patients with known CD and refractory symptoms with cross-sectional imaging was performed. We included patients who underwent T cell receptor rearrangement or T-cell immunophenotyping studies on small bowel (SB) biopsies to classify patients into: healed CD, Type I RCD, or Type II RCD...
January 13, 2017: Abdominal Radiology
William P Shuman, Ryan B O'Malley, Janet M Busey, Mario M Ramos, Kent M Koprowicz
PURPOSE: To compare dual-energy computed tomography (DECT) aortography using a 70% reduced iodine dose to single-energy CT (SECT) aortography using a standard iodine dose in the same patient. METHODS: Twenty-one patients with a prior SECT aortography using standard iodine dose had DECT aortography using 70% reduced iodine dose. Section 120 kVp images were compared to DECT images reconstructed at both 50 and 77 keV. Reviewers measured image noise and attenuation in the aorta at eight locations from proximal to distal and subjectively scored vascular enhancement on a four-point scale...
January 13, 2017: Abdominal Radiology
Badr Al-Bawardy, D Chamil Codipilly, Alberto Rubio-Tapia, David H Bruining, Stephanie L Hansel, Joseph A Murray
Celiac disease (CD) is an immune-mediated inflammatory enteropathy triggered by gluten exposure in genetically susceptible individuals. It has a high prevalence approaching 1% of the US population. A high index of suspicion is warranted to diagnose CD as frequently patients present with extraintestinal or atypical manifestations. CD is diagnosed by a combination of serum serologies and duodenal biopsies. The majority of patients will respond to a lifelong gluten-free diet which is the cornerstone of therapy...
January 12, 2017: Abdominal Radiology
Kyo-Won Gu, Young Kon Kim, Ji Hye Min, Sang Yun Ha, Woo Kyoung Jeong
PURPOSE: To determine the imaging features of hepatic sarcomatous carcinoma including sarcomatous intrahepatic cholangiocarcinoma (S-ICC) and sarcomatous hepatocellular carcinoma (S-HCC) on computed tomography (CT) and gadoxetic acid-enhanced magnetic resonance imaging (MRI). MATERIALS AND METHODS: Twenty-four patients with pathologically confirmed S-ICCs (n = 13), S-HCCs (n = 7), sarcomatous carcinoma (n = 2), carcinosarcoma (n = 1), and sarcomatous combined HCC-CC (n = 1) (size range 2...
January 12, 2017: Abdominal Radiology
Dominic Scola, Lawrence Bahoura, Alexander Copelan, Ali Shirkhoda, Farnoosh Sokhandon
Gastrointestinal stromal tumors (GISTs), the most common mesenchymal tumors of the gastrointestinal tract, are a relatively recently described entity. Most exhibit a mutated tyrosine kinase receptor gene and in some capacity are treated by tyrosine kinase inhibitors. GISTs can occur across the age spectrum but are more common in patients older than 40 years. They exhibit a wide range of clinical presentations and imaging characteristics. All patterns of enhancement on contrast enhanced computed tomography (CECT) can be seen with GISTs, including hypoenhancing, isoenhancing, and hyperenhancing tumors...
January 10, 2017: Abdominal Radiology
Eric P Tamm, Ott Le, Xinming Liu, Rick R Layman, Dianna D Cody, Priya R Bhosale
Dual-energy CT imaging has many potential uses in abdominal imaging. It also has unique requirements for protocol creation depending on the dual-energy scanning technique that is being utilized. It also generates several new types of images which can increase the complexity of image creation and image interpretation. The purpose of this article is to review, for rapid switching and dual-source dual-energy platforms, methods for creating dual-energy protocols, different approaches for efficiently creating dual-energy images, and an approach to navigating and using dual-energy images at the reading station all using the example of a pancreatic multiphasic protocol...
January 9, 2017: Abdominal Radiology
Thomas D Atwell, Paul W Wennberg, Brendan P McMenomy, Naveen S Murthy, Jeremy R Anderson, J Scott Kriegshauser, J Mark McKinney
Peri-procedural anticoagulant management hinges on the balance of hemorrhagic and thrombotic complications. The radiologist is tasked with accurately assessing the hemorrhagic risk for patients undergoing procedures, taking into account procedural bleeding rates, underlying coagulopathy based on lab tests, and use of anticoagulants. The purpose of this article is to provide a contemporary review of commonly used anticoagulants and, incorporating published evidence, review their management related to image-guided procedures...
January 9, 2017: Abdominal Radiology
Nicole Wake, Temitope Rude, Stella K Kang, Michael D Stifelman, James F Borin, Daniel K Sodickson, William C Huang, Hersh Chandarana
OBJECTIVE: To determine whether patient-specific 3D printed renal tumor models change pre-operative planning decisions made by urological surgeons in preparation for complex renal mass surgical procedures. MATERIALS AND METHODS: From our ongoing IRB approved study on renal neoplasms, ten renal mass cases were retrospectively selected based on Nephrometry Score greater than 5 (range 6-10). A 3D post-contrast fat-suppressed gradient-echo T1-weighted sequence was used to generate 3D printed models...
January 7, 2017: Abdominal Radiology
Badr Al-Bawardy, Shannon P Sheedy, Michelle B Herberts, Joseph A Murray, Alberto Rubio-Tapia, Elizabeth Rajan, David H Bruining, Stephanie L Hansel, John M Barlow, Joel G Fletcher, Jeff L Fidler
PURPOSE: Collagenous sprue (CS) is a rare enteropathy characterized by villous atrophy and a thickened subepithelial collagen band. The aim of this study is to describe the cross-sectional imaging findings of CS. METHODS: A case-control, retrospective study with cases of all CS patients from January 2000 to 2015 was performed. Inclusion criteria were (1) Histopathologic diagnosis and (2) Imaging with computed tomography abdomen/pelvis (CT A/P), CT enterography (CTE), or magnetic resonance enterography within 6 months of small bowel (SB) biopsy...
January 5, 2017: Abdominal Radiology
Rogerio N Vasconcelos, Steven G Dolan, John M Barlow, Michael L Wells, Shannon P Sheedy, Jeff L Fidler, Stephanie Hansel, Scott Harmsen, Joel G Fletcher
OBJECTIVE: Our purpose is to determine the impact of CT enterography on small bowel gastrointestinal stromal tumor (GIST) detection and biologic aggressiveness, and to identify any imaging findings that correlate with biologic aggressiveness. METHODS: Records of patients with histologically confirmed small bowel GISTs who underwent CT imaging were reviewed. Biologic aggressiveness was based on initial histologic grading (very low, low, intermediate, high grade; or malignant), with upgrade to malignant category if local or distant metastases developed during clinical follow-up...
January 5, 2017: Abdominal Radiology
Yoav Kimchy, Ronen Lifshitz, Shlomo Lewkowitz, Guiseppe Bertuccio, Nadir Arber, Nathan Gluck, Perry J Pickhardt
Many patients are reluctant to undergo optical colonoscopy for colorectal cancer screening. The Check-Cap colon imaging system is a non-invasive test that comprises an ingestible imaging capsule that emits and detects ultra-low-dose radiation. The capsule generates a 3D reconstruction of the colonic lumen for detection of polyps and cancer. Preliminary preclinical and clinical testing has demonstrated safety and feasibility. Mean radiation dose is estimated at 0.04 mSv. In conclusion, we describe a novel capsule-based, patient-friendly colorectal test that holds potential for non-invasive screening...
January 4, 2017: Abdominal Radiology
Rebecca A P Dijkhoff, Monique Maas, Milou H Martens, Nikolaos Papanikolaou, Doenja M J Lambregts, Geerard L Beets, Regina G H Beets-Tan
PURPOSE: The aim of this study was to assess correlation between quantitative and semiquantitative parameters in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in rectal cancer patients, both in a primary staging and restaging setting. MATERIALS AND METHODS: Nineteen patients were included with DCE-MRI before and/or after neoadjuvant therapy. DCE-MRI was performed with gadofosveset trisodium (Ablavar(®), Lantheus Medical Imaging, North Billerica, Massachusetts, USA)...
January 3, 2017: Abdominal Radiology
Ahmed Abdel Khalek Abdel Razek, Mohammad Alsayed Abd Alhamid Al-Adlany, Alhadidy Mohammed Alhadidy, Mohammed Ali Atwa, Naglaa Elsayed Abass Abdou
PURPOSE: To demonstrate role of diffusion tensor imaging of the kidney in diabetic patients and to correlate renal fractional anisotropy (FA) and apparent diffusion coefficient (ADC) of the renal cortex with urinary and serum biomarkers of diabetes. MATERIAL AND METHODS: Prospective study was conducted upon 42 diabetic patients (28 males, 14 females; mean age = 33 years) and 17 age- and sex-matched volunteers. Diabetic patients were micro-normoalbuminuric (n = 27) and macroalbuminuric (n = 15)...
January 2, 2017: Abdominal Radiology
Dana E Amiraian, David J DiSantis
No abstract text is available yet for this article.
January 2, 2017: Abdominal Radiology
Jieming Fang, Da Zhang, Carol Wilcox, Benedikt Heidinger, Vassilios Raptopoulos, Alexander Brook, Olga R Brook
PURPOSE: To assess single energy metal artifact reduction (SEMAR) and spectral energy metal artifact reduction (MARS) algorithms in reducing artifacts generated by different metal implants. MATERIALS AND METHOD: Phantom was scanned with and without SEMAR (Aquilion One, Toshiba) and MARS (Discovery CT750 HD, GE), with various metal implants. Images were evaluated objectively by measuring standard deviation in regions of interests and subjectively by two independent reviewers grading on a scale of 0 (no artifact) to 4 (severe artifact)...
January 2, 2017: Abdominal Radiology
Colin M Segovis, Raymond B Dyer
No abstract text is available yet for this article.
January 2, 2017: Abdominal Radiology
Ann S Fulcher
No abstract text is available yet for this article.
December 28, 2016: Abdominal Radiology
Hui-Chun Wang, Zhi-Min Wang, Yu-Bin Wang, Xiao-Hong Chen, Lan-Lan Cui
PURPOSE: The aim of this retrospective study was to evaluate the role of delayed images after forced diuresis coupled with oral hydration in abdominopelvic (18)F-FDG PET/CT. MATERIALS AND METHODS: Forty-six patients consisting of 17 urological diseases, 9 gynecological tumors, 18 colorectal malignancies, and 2 cancers of unknown primary site were retrospectively analyzed. All patients who presented with indeterminate or equivocal abdominopelvic foci on standard (18)F-FDG PET/CT underwent a delayed abdominopelvic imaging after administration of 20 mg furosemide intravenously and extra water intake of 500 mL...
December 28, 2016: Abdominal Radiology
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