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Abdominal Radiology

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https://www.readbyqxmd.com/read/28730273/glucose-as-a-stimulation-agent-in-the-bold-functional-magnetic-resonance-imaging-for-liver-cirrhosis-and-hepatocellular-carcinoma-a-feasibility-study
#1
Fang Yuan, Bin Song, Zixing Huang, Xijiao Liu, Chunchao Xia
PURPOSE: To explore the role of glucose as a stimulation agent in the blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) for liver cirrhosis and hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Twenty HCC patients with cirrhosis and 10 healthy volunteers were recruited. BOLD fMRI was performed for all participants prior to and 30 min after oral administration of glucose to measure the T2* values of normal liver parenchyma, HCC liver parenchyma, HCC center, and HCC edge...
July 20, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28721479/new-prostate-cancer-prognostic-grade-group-pgg-can-multiparametric-mri-mpmri-accurately-separate-patients-with-low-intermediate-and-high-grade-cancer
#2
Jamie N Holtz, Rachel Kloss Silverman, Kae Jack Tay, Jill T Browning, Jiaoti Huang, Thomas J Polascik, Rajan T Gupta
PURPOSE: Our objective is to determine the accuracy of multiparametric MRI (mpMRI) in predicting pathologic grade of prostate cancer (PCa) after radical prostatectomy (RP) using simple apparent diffusion coefficient metrics and, specifically, whether mpMRI can accurately separate disease into one of two risk categories (low vs. higher grade) or one of three risk categories (low, intermediate, or high grade) corresponding to the new prognostic grade group (PGG) criteria. METHODS: This retrospective, HIPAA-compliant, IRB-approved study included 140 patients with PCa who underwent 3 T mpMRI with endorectal coil and transrectal ultrasound-guided (TRUS-G) biopsy before RP...
July 18, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28721478/differentiation-of-renal-cell-carcinoma-subtypes-with-different-iodine-quantification-methods-using-single-phase-contrast-enhanced-dual-energy-ct-areal-vs-volumetric-analyses
#3
Chenchen Dai, Yingli Cao, Yan Jia, Yuqin Ding, Ruofan Sheng, Mengsu Zeng, Jianjun Zhou
PURPOSE: To investigate the possibility of iodine quantification during a single nephrographic phase in characterizing renal cell carcinoma (RCC) subtypes and if there is a difference between areal and volumetric iodine quantification methods. MATERIALS AND METHODS: This retrospective study included 110 patients with 113 histopathologically confirmed RCCs scanned by dual-energy CT at the nephrographic phase before surgeries. For each lesion, an areal measurement of the iodine concentration with maximum enhancement (I max enhan) and the iodine concentration with maximum area among slices (I max area), as well as a volumetric iodine concentration of the whole-tumor (I volume), were evaluated by two independent radiologists...
July 18, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28718042/contrast-enhanced-ultrasound-for-focal-liver-lesions-how-accurate-is-it
#4
Richard G Barr
With the recent FDA approval for characterization of focal liver lesions (FLL) in both pediatric and adult patients using Lumason (sulfur hexafluoride microbubbles), increased use of ultrasound contrast for routine clinical use is expected. This agent has been available for many years in Europe and Asia, and a large body of literature is available regarding the sensitivity and specificity of this agent. In addition, a few studies have directly compared CEUS to CECT and CEMRI for the characterization of focal liver lesions...
July 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28712057/phrygian-cap
#5
REVIEW
J Kokilavani, Venkatraman Indiran
No abstract text is available yet for this article.
July 15, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28712056/the-crescent-sign-in-pneumatic-reduction-of-intussusception
#6
REVIEW
Man Leung Yu, Kam Ho Lee, Yan Lin Li
No abstract text is available yet for this article.
July 15, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28702787/multiparametric-magnetic-resonance-imaging-for-transition-zone-prostate-cancer-essential-findings-limitations-and-future-directions
#7
REVIEW
Sara Lewis, Cecilia Besa, Ally Rosen, Ardeshir R Rastinehad, Sahar Semann, Stephanie Hectors, Bachir Taouli
OBJECTIVE: Review the multiparametric MRI (mpMRI) findings of transition zone (TZ) prostate cancer (PCa) using T2-weighted imaging (T2WI), diffusion-weighted imaging (DWI), and dynamic contrast-enhanced (DCE) MRI and to integrate mpMRI findings with clinical history, laboratory values, and histopathology. CONCLUSION: TZ prostate tumors are challenging to detect clinically and at MRI. mpMRI using the combination of sequences has the potential to improve accuracy of TZ cancer detection and staging...
July 12, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28702786/the-water-lily-sign
#8
REVIEW
Hasan Emin Kaya, Ülkü Kerimoğlu
No abstract text is available yet for this article.
July 12, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28695235/preoperative-ct-in-patients-with-surgically-resectable-pancreatic-adenocarcinoma-does-the-time-interval-between-ct-and-surgery-affect-survival
#9
Gerard M Healy, C E Redmond, S Murphy, H Fleming, A Haughey, R Kavanagh, N Swan, K C Conlon, D E Malone, E R Ryan
PURPOSE: The preoperative imaging-to-surgery time interval (ISI) influences the risk of unexpected progression (UP) found at surgery for pancreatic adenocarcinoma. We aimed to assess whether ISI influences disease recurrence and/or survival. METHODS AND MATERIALS: A single-institution, ethics board-approved retrospective analysis of all patients who underwent attempted resection of pancreatic (PDAC) or periampullary adenocarcinoma (AmpAC) between 1st January 2010 and 31st December 2015 was performed...
July 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28695234/pre-and-neonatal-imaging-of-gastrointestinal-complications-in-congenital-diaphragmatic-hernia
#10
REVIEW
Katharina Minkner, Leonor Alamo
The initial outcome in infants with congenital diaphragmatic hernia is mainly related to the associated lung hypoplasia. However, these patients frequently present with additional gastrointestinal pathology that also influences their quality of life and final prognosis. Congenital gastrointestinal anomalies are often observed and the displacement of the liver, the stomach and/or the intestines into the thorax may cause distortion of the vascular axis of these organs, increasing the risk of congestion and/or ischemia...
July 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28695233/li-rads-%C3%A2-algorithm-ct-and-mri
#11
REVIEW
Victoria Chernyak, Cynthia S Santillan, Demetri Papadatos, Claude B Sirlin
The Liver Imaging Reporting and Data System (LI-RADS(®)) is an imaging-based diagnostic system applicable in patients at high risk of hepatocellular carcinoma (HCC). In LI-RADS, each liver observation is assigned a category that reflects probability of benignity, HCC, or other malignancy. Familiarity with the LI-RADS diagnostic algorithm is necessary to appropriately implement LI-RADS in clinical practice. This review discusses steps necessary for application of the LI-RADS algorithm and provides examples illustrating each step...
July 10, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28689221/variable-refocusing-flip-angle-single-shot-fast-spin-echo-imaging-of-liver-lesions-increased-speed-and-lesion-contrast
#12
Robert M Hicks, Andreas M Loening, Michael A Ohliger, Shreyas S Vasanawala, Thomas A Hope
PURPOSE: To evaluate acquisition time and clinical image quality of a variable refocusing flip angle (vrf) single-shot fast spin echo (SSFSE) sequence in comparison with a conventional SSFSE sequence for imaging of liver lesions in patients undergoing whole-body PET/MRI for oncologic staging. METHODS: A vrfSSFSE sequence was acquired in 43 patients with known pancreatic neuroendocrine tumors undergoing (68)Ga-DOTA-TOC PET on a simultaneous time-of-flight 3.0T PET/MRI...
July 8, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28685246/the-fish-hook-sign-of-retrocaval-ureter
#13
REVIEW
Cane F Hoffman, Raymond B Dyer
No abstract text is available yet for this article.
July 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28685245/the-hooked-proximal-celiac-artery
#14
REVIEW
Kam Ho Lee, Man Leung Yu, Michelle Cheung
No abstract text is available yet for this article.
July 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677006/application-of-noninvasive-functional-imaging-to-monitor-the-progressive-changes-in-kidney-diffusion-and-perfusion-in-contrast-induced-acute-kidney-injury-rats-at-3-0-t
#15
Bin Zhang, Yuhao Dong, Baoliang Guo, Wenbo Chen, Fusheng Ouyang, Zhouyang Lian, Jing Liu, Shuixing Zhang
OBJECTIVES: Contrast-induced acute kidney injury is a prevalent cause of renal failure, and the noninvasive tools to monitor its progress are lacking. We applied intravoxel incoherent motion (IVIM) DWI to measure the progressive changes in kidney diffusion and perfusion of CI-AKI. METHODS: Twenty-four rats received Iopromide (370 mg/ml, 1600 mg iodine/kg) to induce CI-AKI. IVIM DWI was performed on rats (n = 6) at 24 h prior to and 12, 24, 48, 72, and 96 h after the injection using a 3...
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677005/tumor-thrombosis-a-peculiar-finding-associated-with-pancreatic-neuroendocrine-neoplasms-a-pictorial-essay
#16
REVIEW
Riccardo De Robertis, Salvatore Paiella, Nicolò Cardobi, Luca Landoni, Paolo Tinazzi Martini, Silvia Ortolani, Giulia De Marchi, Stefano Gobbo, Alessandro Giardino, Giovanni Butturini, Giampaolo Tortora, Claudio Bassi, Mirko D'Onofrio
While abutment, encasement or vessel occlusion are identified in most patients with a pancreatic tumor, tumor thrombosis is an uncommon finding. In particular, there are no description in the literature of tumor thrombosis associated with ductal adenocarcinoma, the most common pancreatic tumor. On the other hand, surgical series reveal that tumor thrombosis is associated with about 5% of pancreatic neuroendocrine neoplasms (PanNENs), and literature data suggest that this finding is frequently underreported on pre-operative imaging examinations...
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677004/morphologic-analysis-with-computed-tomography-may-help-differentiate-fat-poor-angiomyolipoma-from-renal-cell-carcinoma-a-retrospective-study-with-602-patients
#17
Yong Hee Kim, Kyunghwa Han, Young Taik Oh, Dae Chul Jung, Nam Hoon Cho, Sung Yoon Park
PURPOSE: To assess whether morphologic analysis using computed tomography (CT) could differentiate between fat-poor angiomyolipoma (fpAML) and renal cell carcinoma (RCC). METHODS: A total of 602 patients with a histologically confirmed fpAML (n = 49) or RCC (n = 553) were evaluated. All renal lesions were less than 4 cm in size and had no gross fat on contrast-enhanced CT. For morphologic analysis, overflowing beer sign and angular interface were evaluated...
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677003/poly-energetic-and-virtual-mono-energetic-images-from-a-novel-dual-layer-spectral-detector-ct-optimization-of-window-settings-is-crucial-to-improve-subjective-image-quality-in-abdominal-ct-angiographies
#18
Jonas Doerner, Julian A Luetkens, Andra-Iza Iuga, Jonathan Byrtus, Stefan Haneder, David Maintz, Tilman Hickethier
PURPOSE: We aimed to determine optimal window settings for poly-energetic (PolyE) and virtual mono-energetic images (MonoE) derived from abdominal angiographic studies on a novel dual-layer spectral detector CT (SDCT) system. METHODS: From 50 patients, SDCT datasets PolyE and MonoE at 70 and 40 keV levels were reconstructed and best individual window width and level (BI-W/L) manually assessed. Through regression analysis, the so-called optimized individual (OI-W/L) values were obtained...
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677002/the-windsock-sign
#19
REVIEW
Thomas E Pendergrast, Raymond B Dyer
No abstract text is available yet for this article.
July 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28677001/incidental-findings-on-multiparametric-mri-performed-for-evaluation-of-prostate-cancer
#20
Rachael L Sherrer, Win Shun Lai, John V Thomas, Jeffrey W Nix, Soroush Rais-Bahrami
PURPOSE: Multiparametric magnetic resonance imaging (mp-MRI) and MRI/Ultrasound (US) fusion-guided biopsy are relatively new techniques for improved detection, staging, and active surveillance of prostate cancer (PCa). As with all imaging modalities, MRI reveals incidental findings (IFs) which carry the risk of increased cost, patient anxiety, and iatrogenic morbidity due to workup of IFs. Herein, we report the IFs from 684 MRIs for evaluation of PCa and consider their characteristics and clinical significance...
July 4, 2017: Abdominal Radiology
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