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Hepatobiliary MRI

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https://www.readbyqxmd.com/read/27907063/evaluation-of-focal-liver-reaction-after-proton-beam-therapy-for-hepatocellular-carcinoma-examined-using-gd-eob-dtpa-enhanced-hepatic-magnetic-resonance-imaging
#1
Shigeyuki Takamatsu, Kazutaka Yamamoto, Yoshikazu Maeda, Mariko Kawamura, Satoshi Shibata, Yoshitaka Sato, Kazuki Terashima, Yasuhiro Shimizu, Yuji Tameshige, Makoto Sasaki, Satoko Asahi, Tamaki Kondou, Satoshi Kobayashi, Osamu Matsui, Toshifumi Gabata
BACKGROUND: Proton beam therapy (PBT) achieves good local control for hepatocellular carcinoma (HCC), and toxicity tends to be lower than for photon radiotherapy. Focal liver parenchymal damage in radiotherapy is described as the focal liver reaction (FLR); the threshold doses (TDs) for FLR in the background liver have been analyzed in stereotactic ablative body radiotherapy and brachytherapy. To develop a safer approach for PBT, both TD and liver volume changes are considered clinically important in predicting the extent of damage before treatment, and subsequently in reducing background liver damage...
2016: PloS One
https://www.readbyqxmd.com/read/27903759/intrahepatic-distant-recurrence-after-radiofrequency-ablation-for-hepatocellular-carcinoma-precursor-nodules-on-pre-procedural-gadoxetic-acid-enhanced-liver-magnetic-resonance-imaging
#2
Kyoung Doo Song, Hyunchul Rhim, Min Woo Lee, Young-Sun Kim, Tae Wook Kang
BACKGROUND: Intrahepatic distant recurrence (IDR) after radiofrequency (RF) ablation for hepatocellular carcinoma (HCC) is associated with poor overall survival outcome. PURPOSE: To evaluate the incidence and findings on pre-procedural gadoxetic acid-enhanced liver magnetic resonance imaging (MRI) of precursor nodules for IDR after RF ablation for HCC. MATERIAL AND METHODS: This study was approved by our institutional review board. Among 343 patients treated with RF ablation for HCC between 2009 and 2011, 141 patients who underwent pre-procedural gadoxetic acid-enhanced liver MRI and experienced IDR were enrolled...
November 30, 2016: Acta Radiologica
https://www.readbyqxmd.com/read/27862590/hepatic-gadoxetic-acid-uptake-as-a-measure-of-diffuse-liver-disease-where-are-we
#3
REVIEW
Ahmed Ba-Ssalamah, Nina Bastati, Andreas Wibmer, Romana Fragner, Jacqueline C Hodge, Michael Trauner, Christian J Herold, Mustafa R Bashir, Bernard E Van Beers
: MRI has emerged as the most comprehensive noninvasive diagnostic tool for focal liver lesions and diffuse hepatobiliary disorders. The introduction of hepatobiliary contrast agents, most notably gadoxetic acid (GA), has expanded the role of MRI, particularly in the functional imaging of chronic liver diseases, such as nonalcoholic fatty liver disease (NAFLD). GA-enhanced MRI (GA-MRI) may help to distinguish between the two subgroups of NAFLD, simple steatosis and nonalcoholic steatohepatitis...
November 8, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27842889/limitations-of-gd-eob-dtpa-enhanced-mri-can-clinical-parameters-predict-suboptimal-hepatobiliary-phase
#4
M Kobi, V Paroder, M Flusberg, A M Rozenblit, V Chernyak
AIM: To establish cut-off levels of the clinical parameters, which would predict suboptimal 30 minutes delayed hepatobiliary phase (HBP) with high specificity. MATERIALS AND METHODS: This retrospective study included patients with chronic liver disease who underwent hepatocellular carcinoma screening with Gd-EOB-DTPA-enhanced magnetic resonance imaging (MRI) between 1 January 2011 and 30 November 2014. For each case, HBP was graded as adequate or suboptimal, based on Liver Image Reporting and Data System (LI-RADS) criteria...
November 11, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27842668/hepatobiliary-phase-images-using-gadolinium-ethoxybenzyl-diethylenetriamine-penta-acetic-acid-enhanced-mri-as-an-imaging-surrogate-for-the-albumin-bilirubin-grading-system
#5
Yasuo Takatsu, Satoshi Kobayashi, Tosiaki Miyati, Toshiki Shiozaki
OBJECTIVES: To clarify the correlation between hepatobiliary phase (HBP) images using gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid (Gd-EOB-DTPA) and albumin-bilirubin (ALBI) grading system. MATERIALS AND METHODS: We evaluated 220 consecutive patients who underwent liver magnetic resonance imaging with Gd-EOB-DTPA. Quantitative liver-spleen contrast ratio (Q-LSC) was calculated in HBP images approximately 20min after Gd-EOB-DTPA administration. To evaluate the degree of association between Q-LSC and ALBI grade, the Child-Pugh (C-P) score was used for comparison...
December 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27835984/qualitative-analysis-of-small-%C3%A2-2%C3%A2-cm-regenerative-nodules-dysplastic-nodules-and-well-differentiated-hccs-with-gadoxetic-acid-mri
#6
Michele Di Martino, Michele Anzidei, Fulvio Zaccagna, Luca Saba, Sandro Bosco, Massimo Rossi, Stefano Ginanni Corradini, Carlo Catalano
BACKGROUND: The characterization of small lesions in cirrhotic patients is extremely difficult due to the overlap of imaging features among different entities in the step-way of the hepatocarcinogenesis. The aim of our study was to evaluate the role of gadoxetic-acid MRI in the differentiation of small (≤2 cm) well-differentiated hepatocellular carcinomas from regenerative and dysplastic nodules. METHODS: Seventy-three cirrhotic patients, with 118 focal liver lesions (≤2 cm) were prospectively recruited...
November 11, 2016: BMC Medical Imaging
https://www.readbyqxmd.com/read/27815722/disappearing-or-residual-tiny-%C3%A2-5%C3%A2-mm-colorectal-liver-metastases-after-chemotherapy-on-gadoxetic-acid-enhanced-liver-mri-and-diffusion-weighted-imaging-is-local-treatment-required
#7
Seung Soo Kim, Kyoung Doo Song, Young Kon Kim, Hee Cheol Kim, Jung Wook Huh, Young Suk Park, Joon Oh Park, Seung Tae Kim
OBJECTIVES: To evaluate the clinical course of disappearing colorectal liver metastases (DLM) or residual tiny (≤5 mm) colorectal liver metastases (RTCLM) on gadoxetic acid-enhanced magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) in patients who had colorectal liver metastases (CLM) and received chemotherapy. METHODS: Among 137 patients who received chemotherapy for CLM and underwent gadoxetic acid-enhanced MRI and DWI between 2010 and 2012, 43 patients with 168 DLMs and 48 RTCLMs were included...
November 4, 2016: European Radiology
https://www.readbyqxmd.com/read/27801693/change-in-liver-imaging-reporting-and-data-system-characterization-of-focal-liver-lesions-using-gadoxetate-disodium-magnetic-resonance-imaging-compared-with-contrast-enhanced-computed-tomography
#8
Thomas A Hope, Rizwan Aslam, Stefanie Weinstein, Benjamin M Yeh, Carlos U Corvera, Alex Monto, Judy Yee
PURPOSE: The aim of this study was to determine whether gadoxetate-enhanced magnetic resonance imaging (MRI) improves lesion characterization in patients at risk for hepatocellular carcinoma compared with computed tomography (CT). MATERIALS AND METHODS: Forty-nine patients with indeterminate lesions found at contrast-enhanced CT were prospectively enrolled and imaged using gadoxetate-enhanced hepatobiliary phase (HBP) MRI within 30 days of their initial CT. Three readers graded each lesion at CT and MRI using the Liver Imaging Reporting and Data System (LI-RADS) v2014 major criteria and HBP characterization as an ancillary feature...
October 31, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27791362/non-toxic-formulations-of-scintillation-nanocrystals-for-use-as-x-ray-computed-tomography-ct-contrast-agents
#9
Jaewon Lee, Seulgi Choi, Ki Hyun Kim, Hock Gan Heng, Sandra E Torregrosa-Allen, Benjamin S Ramsey, Bennett D Elzey, You-Yeon Won
X-ray computed tomography (CT) is currently one of the most powerful, non-invasive, clinical in vivo imaging techniques, which has resulted from advances in both X-ray device and contrast enhancement technologies. The present study demonstrates, for the first time, that metal tungstates (such as CaWO4) are promising contrast agents for X-ray, radiation and CT imaging, because of the high X-ray mass attenuation of tungsten (W). We have developed a method of formulation, in which CaWO4 (CWO) nanoparticles (NPs) are encapsulated within a bio-compatible poly(ethylene glycol-b-D,L-lactic acid) (PEG-PLA) block copolymer (BCP) capsule...
October 28, 2016: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/27789027/high-flow-haemangiomas-versus-hypervascular-hepatocellular-carcinoma-showing-pseudo-washout-on-gadoxetic-acid-enhanced-hepatic-mri-value-of-diffusion-weighted-imaging-in-the-differential-diagnosis-of-small-lesions
#10
S J Nam, J-S Yu, E-S Cho, J H Kim, J-J Chung
AIM: To validate the usefulness of diffusion-weighted imaging (DWI) in the differentiation of high-flow haemangiomas showing pseudo-washout appearance on gadoxetic acid-enhanced hepatic MRI from small hypervascular hepatocellular carcinomas (HCCs). MATERIALS AND METHODS: DWI (b=50, 800 s/mm(2)) with apparent diffusion coefficient (ADC) maps for 50 haemangiomas (6.4±2.9 mm) showing intense enhancement on arterial dominant phase imaging and hypointensity on transitional and/or hepatobiliary phase imaging during gadoxetic acid-enhanced MRI were retrospectively analysed and compared with that of 113 hypervascular HCCs (12...
October 24, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27787908/presence-of-non-hypervascular-hypointense-nodules-on-gd-eob-dtpa-enhanced-mri-in-patients-with-hepatocellular-carcinoma
#11
Masanori Inoue, Sadahisa Ogasawara, Tetsuhiro Chiba, Yoshihiko Ooka, Toru Wakamatsu, Kazufumi Kobayashi, Eiichiro Suzuki, Akinobu Tawada, Osamu Yokosuka
BACKGROUND AND AIMS: Gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) performed before curative therapy for hepatocellular carcinoma (HCC) can distinguish between intrahepatic distant recurrence and hypervascularization. We aimed to retrospectively evaluate the presence of non-hypervascular hypointense nodules on hepatobiliary phase images (HBPI) from Gd-EOB-DTPA-enhanced MRI as a risk factor of the intrahepatic distant recurrence of early-stage HCC following radiofrequency ablation (RFA)...
October 27, 2016: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27780379/pre-hepatectomy-assessment-of-bile-transporter-expression-by-gadoxetic-acid-enhanced-mri-in-a-rat-model-of-liver-cirrhosis
#12
Joohyun Kim, Tae Kim, Kwan Soo Hong, Hyeyoung Moon, In-Kyung Oh, Sang Mok Lee, Mark D Hohenwalter, Michael A Zimmerman, David C Cronin, Johnny C Hong
BACKGROUND: Gadoxetic acid is a liver-specific intravenous T1 magnetic resonance (MR) contrast agent that is excreted via the hepatobiliary system. We hypothesize that hepatocyte expressions of bile transporters (OATP1 and MRP2) correlate with dynamic profile of Gadoxetic acid enhanced (GE)-MR imaging (MRI). METHODS: Two groups of rats, control (n = 6) and cirrhosis (n = 12), received gadoxetic acid enhanced MRI followed by 70% hepatectomy. The change in MR signal intensity from the baseline before the contrast injection (ΔSI) was analyzed every minute for 30 min...
October 26, 2016: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/27778300/liver-perfusion-modifies-gd-dtpa-and-gd-bopta-hepatocyte-concentrations-through-transfer-clearances-across-sinusoidal-membranes
#13
Jean-Luc Daire, Benjamin Leporq, Valérie Vilgrain, Bernard E Van Beers, Sabine Schmidt, Catherine M Pastor
BACKGROUND AND OBJECTIVES: Gadobenate dimeglumine (Gd-BOPTA) is a commercialised hepatobiliary contrast agent used during liver magnetic resonance imaging (MRI) to detect liver diseases. It enters into human hepatocytes through organic anion transporting polypeptides (OATP1B1/B3) and crosses the canalicular transporter multiple resistance-associated protein 2 (MRP2) to be excreted into bile canaliculi. Gd-BOPTA can return to sinusoids via the sinusoidal transporters MRP3/MRP4. Hepatocyte concentrations of Gd-BOPTA depend on three clearances: the sinusoidal clearance or volume of sinusoidal blood cleared of drugs per unit of time and two hepatocyte clearances (into bile canaliculi or back to sinusoids) or volume of hepatocytes cleared of drugs per unit of time in the respective liver compartments...
October 24, 2016: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/27776652/biliary-tract-enhancement-in-gadoxetic-acid-enhanced-mri-correlates-with-liver-function-biomarkers
#14
Yoshifumi Noda, Satoshi Goshima, Kimihiro Kajita, Hiroshi Kawada, Nobuyuki Kawai, Hiromi Koyasu, Masayuki Matsuo, Kyongtae T Bae
PURPOSE: To evaluate the association between gadoxetic-acid-enhanced magnetic resonance (MR) imaging measurements and laboratory and clinical biomarkers of liver function and fibrosis. MATERIALS AND METHODS: One hundred thirty nine consecutive patients with suspected liver disease or liver tumor underwent gadoxetic-acid-enhanced MR imaging. MR imaging measurements during the hepatobiliary phase included biliary tract structure-to-muscle signal intensity ratio (SIR)...
November 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27771842/central-vascular-structures-as-a-characteristic-finding-of-regenerative-nodules-using-hepatobiliary-phase-gadolinium-ethoxybenzyl-diethylenetriaminepentaacetic-acid-enhanced-mri-and-arterial-dominant-phase-contrast-enhanced-us
#15
Kazuya Sugimori, Kazushi Numata, Masahiro Okada, Hiromi Nihonmatsu, Shigeo Takebayashi, Shin Maeda, Masayuki Nakano, Katsuaki Tanaka
OBJECTIVE: We investigated the characteristic findings of regenerative nodules (RNs) for differentiating early hepatocellular carcinoma (HCC) from high-grade dysplastic nodules (HGDNs) using magnetic resonance imaging (MRI) with gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA; EOB-MRI) and contrast-enhanced ultrasonography (CEUS) in patients with chronic liver disease. SUBJECTS AND METHODS: Pathologically confirmed lesions (100 early HCCs, 7 HGDNs, and 20 RNs with a maximum diameter of more than 1 cm and mean maximal diameters of 15...
October 22, 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/27770429/radiation-dosimetry-of-the-%C3%AE-4%C3%AE-2-nicotinic-receptor-ligand-18-f-flubatine-comparing-preclinical-pet-mri-and-pet-ct-to-first-in-human-pet-ct-results
#16
Mathias Kranz, Bernhard Sattler, Solveig Tiepolt, Stephan Wilke, Winnie Deuther-Conrad, Cornelius K Donat, Steffen Fischer, Marianne Patt, Andreas Schildan, Jörg Patt, René Smits, Alexander Hoepping, Jörg Steinbach, Osama Sabri, Peter Brust
BACKGROUND: Both enantiomers of [(18)F]flubatine are new radioligands for neuroimaging of α4β2 nicotinic acetylcholine receptors with positron emission tomography (PET) exhibiting promising pharmacokinetics which makes them attractive for different clinical questions. In a previous preclinical study, the main advantage of (+)-[(18)F]flubatine compared to (-)-[(18)F]flubatine was its higher binding affinity suggesting that (+)-[(18)F]flubatine might be able to detect also slight reductions of α4β2 nAChRs and could be more sensitive than (-)-[(18)F]flubatine in early stages of Alzheimer's disease...
December 2016: EJNMMI Physics
https://www.readbyqxmd.com/read/27770230/added-value-of-smooth-hypointense-rim-in-the-hepatobiliary-phase-of-gadoxetic-acid-enhanced-mri-in-identifying-tumour-capsule-and-diagnosing-hepatocellular-carcinoma
#17
Chansik An, Hyungjin Rhee, Kyunghwa Han, Jin-Young Choi, Young-Nyun Park, Mi-Suk Park, Myeong-Jin Kim, Sumi Park
OBJECTIVES: To examine the added value of considering smooth hypointense rim in the hepatobiliary phase (HBP) of gadoxetic acid-enhanced MRI as capsule appearance for diagnosing tumour capsules and hepatocellular carcinoma (HCC). METHODS: A total of 377 hepatic lesions (330 HCCs, 35 non-HCC malignancies and 12 benign) were included from 345 patients who underwent resection after MRI between January 2008 and December 2011. Two radiologists assessed the presence or absence of conventional capsule appearance and smooth hypointense rim in the HBP, and categorized each hepatic lesion according to the Liver Imaging Reporting and Data System...
October 21, 2016: European Radiology
https://www.readbyqxmd.com/read/27750237/comparison-of-contrast-enhanced-ultrasound-and-gadolinium-ethoxybenzyl-diethylenetriamine-pentaacetic-acid-enhanced-mri-for-the-diagnosis-of-macroscopic-type-of-hepatocellular-carcinoma
#18
Takayuki Iwamoto, Yasuharu Imai, Sachiyo Kogita, Takumi Igura, Yoshiyuki Sawai, Kazuto Fukuda, Yoshitaka Yamaguchi, Yasushi Matsumoto, Masanori Nakahara, Osakuni Morimoto, Yasushi Seki, Hiroshi Ohashi, Norihiko Fujita, Masatoshi Kudo, Tetsuo Takehara
OBJECTIVE: We compared the efficacy of contrast-enhanced ultrasound sonography (CEUS) with sonazoid and gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI for the assessment of macroscopic classification of nodular hepatocellular carcinoma (HCC). METHODS: Seventy-seven consecutive patients with 79 surgically resected HCCs who underwent both preoperative CEUS and Gd-EOB-DTPA-enhanced MRI were enrolled in this retrospective study...
2016: Digestive Diseases
https://www.readbyqxmd.com/read/27729223/molecular-imaging-and-liver-function-assessment-by-hepatobiliary-mri
#19
Jens Ricke, Max Seidensticker
No abstract text is available yet for this article.
October 10, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27726242/washout-appearance-in-gd-eob-dtpa-enhanced-mr-imaging-a-differentiating-feature-between-hepatocellular-carcinoma-with-paradoxical-uptake-on-the-hepatobiliary-phase-and-focal-nodular-hyperplasia-like-nodules
#20
Jeong Woo Kim, Chang Hee Lee, Soo Byn Kim, Bit Na Park, Yang Shin Park, Jongmee Lee, Cheol Min Park
PURPOSE: To identify the most reliable imaging features for differentiating hepatocellular carcinoma with paradoxical uptake on the hepatobiliary phase (HCCpara ) from focal nodular hyperplasia (FNH)-like nodules using Gd-EOB-DTPA-enhanced MRI. MATERIALS AND METHODS: This was a retrospective study. Twenty patients with HCCpara and 21 patients with FNH-like nodules were included. The following MRI features were evaluated using 3.0 Tesla unit by two radiologists: signal intensity (SI) on T1-, T2-, and diffusion-weighted imaging (DWI), arterial enhancement pattern, washout appearance on the portal venous phase (PVP) and/or transitional phase (TP), uptake pattern on the hepatobiliary phase (HBP), "T2 scar," "EOB scar," and chemical shift on in- and out-of-phase images...
October 11, 2016: Journal of Magnetic Resonance Imaging: JMRI
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