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Hepatobiliary MRI

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https://www.readbyqxmd.com/read/29142626/resection-and-observation-for-brain-metastasis-without-prompt-postoperative-radiation-therapy
#1
Tae-Wook Song, In-Young Kim, Shin Jung, Tae-Young Jung, Kyung-Sub Moon, Woo-Youl Jang
Objective: Total resection without consecutive postoperative whole brain radiation therapy is indicated for patients with a single or two sites of brain metastasis, with close follow-up by serial magnetic resonance imaging (MRI). In this study, we explored the effectiveness, usefulness, and safety of this follow-up regimen. Methods: From January 2006 to December 2015, a total of 109 patients (76 males, 33 females) underwent tumor resection as the first treatment for brain metastases (97 patients with single metastases, 12 with two metastases)...
November 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/29111237/imaging-findings-of-primary-hepatic-angiosarcoma-on-gadoxetate-disodium-enhanced-liver-mri-comparison-with-hepatic-haemangiomas-of-similar-size
#2
B Kim, J H Byun, J H Lee, B J Park, H-J Kwon, J H Lee, S J Lee, H J Won, Y M Shin, P N Kim
AIM: To describe imaging characteristics of primary hepatic angiosarcoma on gadoxetate disodium-enhanced dynamic magnetic resonance imaging (MRI) and to determine features that differentiate angiosarcomas from similar-sized haemangiomas. MATERIALS AND METHODS: The study included 15 patients with hepatic angiosarcomas and 35 patients with size-matched hepatic haemangiomas who underwent gadoxetate disodium-enhanced liver MRI. The number, size, growth pattern, signal intensity (SI) characteristics, and SI changes on dynamic scans were evaluated and compared between the two entities...
October 27, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/29110059/differentiating-focal-nodular-hyperplasia-from-hepatocellular-adenoma-is-hepatobiliary-phase-mri-hbp-mri-using-linear-gadolinium-chelates-always-useful
#3
Marion Roux, Frederic Pigneur, Laurence Baranes, Julien Calderaro, Mélanie Chiaradia, Thomas Decaens, Sandrine Kastahian, Anaïs Charles-Nelson, Lambros Tselikas, Charlotte Costentin, Alexis Laurent, Daniel Azoulay, Ariane Mallat, Alain Rahmouni, Alain Luciani
PURPOSE: To assess the value of Hepatobiliary phase MRI (HPB-MRI) to differentiate FNH and HCA, and evaluate its impact on diagnostic accuracy, diagnostic confidence, inter-observer variability, and patient clinical management. METHODS: Forty-nine patients referred for Gd-BOPTA-enhanced MRI were retrospectively included in this IRB-approved study, with a total of 119 lesions-90 FNH and 29 HCA. Two observers separately assessed in 2 distinct randomized reading sessions the performance of MRI with (HBP-MRI) or without (conventional MRI) the use of HBP images...
November 6, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29101365/biomineral-nano-theranostic-agent-for-magnetic-resonance-image-guided-augmented-radiofrequency-ablation-of-liver-tumor
#4
Anusha Ashokan, Vijay Harish Somasundaram, Genekehal Siddaramana Gowd, Ida M Anna, Giridharan L Malarvizhi, Badrinathan Sridharan, Rupal B Jobanputra, Reshmi Peethambaran, A K K Unni, Shantikumar Nair, Manzoor Koyakutty
Theranostic nanoparticles based on biocompatible mineral compositions can significantly improve the translational potential of image guided cancer nano-therapy. Here, we report development of a single-phase calcium phosphate biomineral nanoparticle (nCP) with dual-mode magnetic resonance contrast (T1-T2) together with radiofrequency (RF) mediated thermal response suitable for image-guided RF ablation of cancer. The nanoparticles (NP) are engineered to provide dual MR contrast by an optimized doping concentration (4...
November 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29081933/cystic-intra-abdominal-masses-in-children
#5
Luisa Ferrero, Riccardo Guanà, Giulia Carbonaro, Maria Grazia Cortese, Luca Lonati, Elisabetta Teruzzi, Jurgen Schleef
Benign intra-abdominal cystic masses in infancy are fairly uncommon and their etiopathogenesis, histology and clinical presentation differ significantly. Our aim is to report our experience in their treatment in order to discuss the best diagnostic and treatment modality. The medical records of 5 children (2M, 3F) with cystic intraabdominal masses referred to our hospital between November 2012 and September 2016, were retrospectively reviewed. All patients underwent open surgery and subsequent histopathologic analysis...
October 6, 2017: Pediatric Reports
https://www.readbyqxmd.com/read/29063251/management-of-subcentimetre-arterially-enhancing-and-hepatobiliary-hypointense-lesions-on-gadoxetic-acid-enhanced-mri-in-patients-at-risk-for-hcc
#6
Chae Jung Park, Chansik An, Sumi Park, Jin-Young Choi, Myeong-Jin Kim
OBJECTIVES: To investigate the significance of subcentimetre (≤1 cm) arterially enhancing and hepatobiliary hypointense lesions (SAELs) observed on gadoxetic acid-enhanced magnetic resonance imaging (MRI) of patients at risk of hepatocellular carcinoma (HCC). METHODS: A SAEL was defined as a subcentimetre hypervascular nodule exhibiting a hepatobiliary phase defect on gadoxetic acid-enhanced MRI. We included 52 SAELs from 46 patients in a HCC surveillance population...
October 23, 2017: European Radiology
https://www.readbyqxmd.com/read/29050339/aberrant-expression-of-oatp1b3-in-colorectal-cancer-liver-metastases-and-its-clinical-implication-on-gadoxetic-acid-enhanced-mri
#7
Seung Hyun Park, Honsoul Kim, Eun Kyung Kim, Hogeun Kim, Dong Kyu Choi, Yong Eun Chung, Myeong-Jin Kim, Jin-Young Choi
PURPOSE: To investigate the factors associated with hepatobiliary phase (HBP) enhancement at gadoxetic acid-enhanced magnetic resonance imaging (MRI) and to determine whether HBP images could be used to predict prognosis in patients with colorectal cancer liver metastasis (CRLM). RESULTS: Of the 96 total nodules, 65 and 31 nodules were in the mixed and clearly hypointense groups, respectively. In the 55 nodules without preoperative chemotherapy, organic anionic transporting polypeptide 1B3 (OATP1B3) expression was a significant factor regarding the HBP enhancement (P=0...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29049250/comparison-of-the-efficacy-of-gd-eob-dtpa-enhanced-magnetic-resonance-imaging-and-magnetic-resonance-elastography-in-the-detection-and-staging-of-hepatic-fibrosis
#8
Wen-Pei Wu, Cheng-In Hoi, Ran-Chou Chen, Ching-Po Lin, Chen-Te Chou
The present study compared the efficacy of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) and magnetic resonance elastography (MRE) in the estimation of hepatic fibrosis stages with histopathologic correlation.This retrospective study included 104 patients (87 men and 17 women; mean age, 60.6 ± 10.6 years) with chronic liver disease who underwent both Gd-EOB-DTPA-enhanced MRI and MRE. The relative enhancement (RE) ratio of the liver parenchyma and the contrast enhancement index (CEI) were calculated as (SIpostliver - SIpreliver)/SIpreliver and SIpost/SIpre, respectively, where SIpost and SIpre were the liver-to-muscle signal intensity ratios on the hepatobiliary phase images and noncontrast-enhanced images, respectively...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29040990/non-hypervascular-hypointense-hepatic-nodules-during-the-hepatobiliary-phase-of-gadolinium-ethoxybenzyl-diethylenetriamine-pentaacetic-acid-enhanced-mri-as-a-risk-factor-of-intrahepatic-distant-recurrence-after-radiofrequency-ablation-of-hepatocellular-carcinoma
#9
Takayuki Iwamoto, Yasuharu Imai, Takumi Igura, Sachiyo Kogita, Yoshiyuki Sawai, Kazuto Fukuda, Yoshitaka Yamaguchi, Yasushi Matsumoto, Masanori Nakahara, Osakuni Morimoto, Hiroshi Ohashi, Norihiko Fujita, Masatoshi Kudo, Tetsuo Takehara
BACKGROUND: Non-hypervascular hypointense hepatic nodules during the hepatobiliary phase of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI have been reported to be associated with intrahepatic distant recurrence (IDR) after hepatectomy or radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC). IDR is categorized into hypervascular transformation of non-hypervascular hypointense hepatic nodules and new intrahepatic recurrence. The aim of this study was to evaluate the relationship between non-hypervascular hypointense hepatic nodules on Gd-EOB-DTPA-enhanced MRI and IDR after RFA, focusing on new intrahepatic recurrence...
2017: Digestive Diseases
https://www.readbyqxmd.com/read/29033416/progression-of-hepatic-hypovascular-nodules-with-hypointensity-in-the-hepatobiliary-phase-of-gd-eob-dtpa-enhanced-mri-in-hepatocellular-carcinoma-cases
#10
Tsukasa Saitoh, Shuichi Sato, Tomotaka Yazaki, Hiroshi Tobita, Tatsuya Miyake, Shunji Ishihara, Takashi Katsube, Hajime Kitagaki, Yoshikazu Kinoshita
Purpose We investigated the possible factors for predicting the future progression to hepatocellular carcinoma (HCC) from hypovascular nodules detected in the hepatobiliary phase of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid-enhanced magnetic resonance imaging (Gd-EOB-DTPA-MRI). Material and Methods A total of 91 hypovascular nodules detected by Gd-EOB-DTPA-MRI in 28 patients without any past history of treatment for HCC were retrospectively examined. The nodules were categorized into those with and without HCC progression, then comparisons were made to identify any factors possibly related to a progression to HCC in each case...
October 16, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29029443/quantitative-evaluation-of-gd-eob-dtpa-uptake-in-focal-liver-lesions-by-using-t1-mapping-differences-between-hepatocellular-carcinoma-hepatic-focal-nodular-hyperplasia-and-cavernous-hemangioma
#11
Zhenpeng Peng, Chang Li, Tao Chan, Huasong Cai, Yanji Luo, Zhi Dong, Zi-Ping Li, Shi-Ting Feng
OBJECTIVES: To investigate the difference of T1 relaxation time on Gd-EOB-DTPA-enhanced MRI in hepatocellular carcinoma (HCC), hepatic focal nodular hyperplasia (FNH) and cavernous hemangioma of liver (CHL), and to quantitatively evaluate the uptake of Gd-EOB-DTPA in these three focal liver lesions (FLLs). RESULTS: The T1P of CHL was significantly higher than those of HCC and FNH (P < 0.05). Reduction of T1 relaxation time on hepatobiliary phase could be observed in all three types of lesions...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28987695/primary-benign-liver-lesions
#12
REVIEW
Luigi Grazioli, Roberta Ambrosini, Barbara Frittoli, Marco Grazioli, Mario Morone
Benign focal liver lesions can origin from all kind of liver cells: hepatocytes, mesenchymal and cholangiocellular line. Their features at imaging may sometimes pose difficulties in differential diagnosis with malignant primary and secondary lesions. In particular, the use of MDCT and MRI with extracellular and hepatobiliary Contrast Agents may non invasively help in correct interpretation and definition of hepatocellular or mesenchymal and inflammatory nature, allowing to choose the best treatment option. The peculiarities of main benign liver lesions at US, CT and MRI are described, with special attention to differential diagnosis and diagnostic clues...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28987693/association-between-non-hypervascular-hypointense-nodules-on-gadoxetic-acid-enhanced-mri-and-liver-stiffness-or-hepatocellular-carcinoma
#13
Jeong Ah Hwang, Tae Wook Kang, Young Kon Kim, Seong Hyun Kim, Yong Han Paik, Sang Yun Ha, Seonwoo Kim
PURPOSE: To assess the association between non-hypervascular hypointense nodules (NHHNs) on gadoxetic acid-enhanced magnetic resonance imaging (MRI) and liver stiffness (LS) in patients with chronic liver disease, and analyzed their progression to overt hepatocellular carcinoma (HCC). METHODS: Between August 2012 and March 2016, a total of 714 consecutive patients who had undergone transient elastography for LS measurement and gadoxetic acid-enhanced MRI were investigated...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28987688/differentiation-of-hypointense-nodules-on-gadoxetic-acid-enhanced-hepatobiliary-phase-mri-using-t2-enhanced-spin-echo-imaging-with-the-time-reversed-gradient-echo-sequence-an-initial-experience
#14
Masami Yoneyama, Yukihisa Takayama, Akihiro Nishie, Masanobu Nakamura, Yasutomo Katsumata, Atsushi Takemura, Makoto Obara, Tomoyuki Okuaki, Hiroshi Honda, Marc Van Cauteren
PURPOSE: To optimize the flip angle (FA) of the T2 enhanced spin-echo imaging using the time reversed gradient echo (T2FFE) and evaluate its utility for differentiating hypointensity nodules in the hepatobiliary phase (HBP) of gadoxetic acid-enhanced (Gd-EOB) MRI. MATERIALS AND METHODS: First, FA optimization of the T2FFE in the HBP was investigated by comparing signal-to-noise ratio (SNR) among different FAs using phantoms. The liver-to-muscle contrast ratios (CRLiver-Muscle) and image quality among three FAs (20°, 50° and 80°) were compared using images of 10 patients...
October 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28951510/increased-cholestatic-enzymes-in-two-patients-with-long-term-history-of-ulcerative-colitis-consider-primary-biliary-cholangitis-not-always-primary-sclerosing-cholangitis
#15
Erietta Polychronopoulou, Vasiliki Lygoura, Nikolaos K Gatselis, George N Dalekos
Several hepatobiliary disorders have been reported in ulcerative colitis (UC) patients with primary sclerosing cholangitis (PSC) being the most specific. Primary biliary cholangitis (PBC), previously known as primary biliary cirrhosis, rarely occurs in UC. We present two PBC cases of 67 and 71 years who suffered from long-standing UC. Both patients were asymptomatic but they had increased cholestatic enzymes and high titres of antimitochondrial antibodies (AMA)-the laboratory hallmark of PBC. After careful exclusion of other causes of cholestasis by MRI/magnetic resonance cholangiopancreatography (MRCP), virological and microbiological investigations, a diagnosis of PBC associated with UC was established...
September 25, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28902795/magnetic-resonance-imaging-of-neuroendocrine-tumor-hepatic-metastases-does-hepatobiliary-phase-imaging-improve-lesion-conspicuity-and-interobserver-agreement-of-lesion-measurements
#16
Brian Morse, Daniel Jeong, Kerry Thomas, Dalanda Diallo, Jonathan R Strosberg
OBJECTIVE: The aim of this study was to determine if magnetic resonance imaging (MRI) performed with hepatobiliary phase imaging results in higher lesion conspicuity and produces lesion measurements with higher interobserver agreement than other MRI sequences when imaging neuroendocrine hepatic metastases. METHODS: Patients who had MRIs with both gadoxetate disodium and gadopentetate dimeglumine contrast within a 6-month span were identified, and 23 hepatic lesions were selected...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28895422/the-value-of-gd-bopta-enhanced-mris-and-dwi-in-the-diagnosis-of-intrahepatic-mass-forming-cholangiocarcinoma
#17
C C Xu, Y F Tang, X Z Ruan, Q L Huang, L Sun, J Li
The aim of this study is to explore the value of unenhanced magnetic resonance imaging (MRI), gadobenate dimeglumine injection (Gd-BOPTA)-enhanced MRI and diffusion-weighted imaging (DWI) in the diagnosis of intrahepatic mass-forming cholangiocarcinoma (IMCC). Totally 59 IMCC patients who underwent Gd-BOPTA-enhanced MRIs were recruited. The time-signal intensity curves and lesion periphery enhancement rates of the IMCC and liver parenchyma was drawn using apparent diffusion coefficient (ADC) values. The Gd-BOPTA-enhanced MRI showed that the peripheries of 30 lesions in the arterial phase exhibited irregular ring enhancement...
September 12, 2017: Neoplasma
https://www.readbyqxmd.com/read/28858038/liver-fibrosis-quantification-by-magnetic-resonance-imaging
#18
Léonie Petitclerc, Guillaume Gilbert, Bich N Nguyen, An Tang
Liver fibrosis is a hallmark of chronic liver disease characterized by the excessive accumulation of extracellular matrix proteins. Although liver biopsy is the reference standard for diagnosis and staging of liver fibrosis, it has some limitations, including potential pain, sampling variability, and low patient acceptance. Hence, there has been an effort to develop noninvasive imaging techniques for diagnosis, staging, and monitoring of liver fibrosis. Many quantitative techniques have been implemented on magnetic resonance imaging (MRI) for this indication...
August 28, 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28853292/prediction-of-high-stage-liver-fibrosis-using-adc-value-on-diffusion-weighted-imaging-and-quantitative-enhancement-ratio-at-the-hepatobiliary-phase-of-gd-eob-dtpa-enhanced-mri-at-1-5%C3%A2-t
#19
Taiyo L Harada, Kazuhiro Saito, Yoichi Araki, Jun Matsubayashi, Toshitaka Nagao, Katsutoshi Sugimoto, Koichi Tokuuye
Background Recently, diffusion-weighted imaging (DWI) and quantitative enhancement ratio measured at the hepatobiliary phase (HBP) of Gd-EOB-DTPA-enhanced magnetic resonance imaging (MRI) has been established as an effective method for evaluating liver fibrosis. Purpose To evaluate which is a more favorable surrogate marker in predicting high-stage liver fibrosis, apparently diffusion coefficient (ADC) value or quantitative enhancement ratio measured on HBP. Material and Methods Eighty-three patients with 99 surgically resected hepatic lesions were enrolled in this study...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28828680/li-rads-major-features-ct-mri-with-extracellular-agents-and-mri-with-hepatobiliary-agents
#20
Cynthia Santillan, Kathryn Fowler, Yuko Kono, Victoria Chernyak
The Liver Imaging Reporting and Data System (LI-RADS) was designed to standardize the interpretation and reporting of observations seen on studies performed in patients at risk for development of hepatocellular carcinoma (HCC). The LI-RADS algorithm guides radiologists through the process of categorizing observations on a spectrum from definitely benign to definitely HCC. Major features are the imaging features used to categorize observations as LI-RADS 3 (intermediate probability of malignancy), LIRADS 4 (probably HCC), and LI-RADS 5 (definite HCC)...
August 21, 2017: Abdominal Radiology
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