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https://www.readbyqxmd.com/read/29792748/portal-vein-thrombosis-imaging-the-spectrum-of-disease-with-an-emphasis-on-mri-features
#1
Reena C Jha, Satinderpal Singh Khera, Amit Dinesh Kalaria
OBJECTIVE: The purpose of this article is to review the classic and uncommon imaging findings of portal vein thrombosis (PVT) (acute, chronic, congenital, and septic thrombus) as visualized on multiple modalities, with an emphasis on MRI findings. Additional aims are to understand the imaging of obliterative portal venopathy and its clinical significance, appreciate morphologic changes of the biliary system that may accompany PVT, and recognize changes in liver enhancement patterns seen with PVT related to the hepatic arterial buffer response...
May 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29788534/prospective-evaluation-of-68-ga-dotatate-pet-ct-in-limited-disease-neuroendocrine-tumors-and-or-elevated-serum-neuroendocrine-biomarkers
#2
Sophie Gabriel, Philippe Garrigue, Laetitia Dahan, Frédéric Castinetti, Frédéric Sebag, Karine Baumstark, Cendrine Archange, Jha Abhishek, Karel Pacak, Benjamin Guillet, David Taïeb
CONTEXT: The 68 Ga-labelled somatostatin analogues (68 Ga-DOTA-SSAs) is becoming popular as an important diagnostic tool in neuroendocrine tumors as evidenced by a growing number of reports detailing institutional experience with various DOTA peptides. However, only few prospective studies have compared 68 Ga-DOTA-SSAs and somatostatin receptor scintigraphy (SRS) in gastroenteropancreatic neuroendocrine tumors (GEP-NETs) and pulmonary neuroendocrine tumors. OBJECTIVE: The aim of our prospective study was to perform head-to-head comparison between 68 Ga-DOTATATE PET/CT and standard imaging work-up (SI) that included multiphasic CT, liver MRI, and SRS using single photon emission computed tomography...
May 22, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29786487/diffusion-weighted-mri-is-superior-to-pet-ct-in-predicting-survival-of-patients-undergoing-90-y-radioembolization-of-hepatic-metastases
#3
Alexandra Barabasch, Alexander Heinzel, Philipp Bruners, Nils A Kraemer, Christiane K Kuhl
Purpose To determine the relationship between diffusion-weighted (DW) liver MR images obtained 4-6 weeks after lobar yttrium 90 (90 Y) treatment and overall survival in comparison with PET/CT or established oncologic factors known to affect survival. Materials and Methods The institutional review board approved this prospective intraindividual comparative study in 36 consecutive patients (25 women) with liver-dominant metastases (20 colorectal, 14 breast, two other) (mean age, 60 years ± 10 [standard deviation]) who underwent fluorine 18 (18 F) fluorodeoxyglucose (FDG) PET/CT and DW MRI before and 4-6 weeks after 90 Y radioembolization...
May 21, 2018: Radiology
https://www.readbyqxmd.com/read/29785727/body-composition-profiling-in-the-uk-biobank-imaging-study
#4
Jennifer Linge, Magnus Borga, Janne West, Theresa Tuthill, Melissa R Miller, Alexandra Dumitriu, E Louise Thomas, Thobias Romu, Patrik Tunón, Jimmy D Bell, Olof Dahlqvist Leinhard
OBJECTIVE: This study aimed to investigate the value of imaging-based multivariable body composition profiling by describing its association with coronary heart disease (CHD), type 2 diabetes (T2D), and metabolic health on individual and population levels. METHODS: The first 6,021 participants scanned by UK Biobank were included. Body composition profiles (BCPs) were calculated, including abdominal subcutaneous adipose tissue, visceral adipose tissue (VAT), thigh muscle volume, liver fat, and muscle fat infiltration (MFI), determined using magnetic resonance imaging...
May 22, 2018: Obesity
https://www.readbyqxmd.com/read/29781162/predictors-of-ultrasound-failure-to-detect-hepatocellular-carcinoma
#5
Mariya L Samoylova, Neil Mehta, John P Roberts, Francis Y Yao
Current guidelines recommend ultrasound (US) for hepatocellular carcinoma (HCC) surveillance in cirrhosis. We assess predictors of decreased US sensitivity for detecting HCC. At a single U.S. center, all HCC patients evaluated for liver transplant (LT) receive an abdominal US. In consecutive patients presenting 2007-2015, untreated lesions found on CT/MRI within 3 months of US were compared with US findings. Multivariable logistic regression models compared US sensitivities by patient characteristics. Of 1008 patients completing LT evaluation, 47...
May 21, 2018: Liver Transplantation
https://www.readbyqxmd.com/read/29780065/prediction-of-fontan-associated-liver-disease-using-a-novel-cine-magnetic-resonance-imaging-vortex-flow-map-in-the-right-atrium
#6
Umiko Ishizaki, Michinobu Nagao, Yumi Shiina, Kenji Fukushima, Tatsunori Takahashi, Yamato Shimomiya, Yuka Matsuo, Kei Inai, Shuji Sakai
BACKGROUND: Long-term hepatic dysfunction is an increasingly recognized complication of the Fontan operation for univentricular hearts. The purpose of this study was to determine whether Fontan-associated liver disease (FALD) could be predicted by flow dynamics in the right atrium (RA) of Fontan circulation.Methods and Results:Cardiac MRI and the serum levels of total bilirubin (TBil) and hyaluronic acid (HA) were analyzed in 36 patients who underwent an atriopulmonary connection type of Fontan operation...
May 18, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29775791/an-imaging-biomarker-for-assessing-hepatic-function-in-patients-with-primary-sclerosing-cholangitis
#7
Jennifer Schulze, Henrike Lenzen, Jan B Hinrichs, Burckhardt Ringe, Michael P Manns, Frank Wacker, Kristina I Ringe
BACKGROUND & AIMS: We aimed to evaluate the potential of hepatobiliary phase magnetic resonance imaging (MRI) as parameter for assessment of hepatocellular function in patients with primary sclerosing cholangitis (PSC). METHODS: We collected data from 111 patients (83 male, 28 female; median, 44 years old), from March 2012 through March 2016, with a confirmed diagnosis of PSC who underwent MRI evaluation before and after injection (hepatobiliary phase) of a hepatocyte-specific contrast agent (gadoxetate disodium)...
May 15, 2018: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29774188/gadofosveset-enhanced-magnetic-resonance-imaging-as-a-problem-solving-tool-for-diagnosing-colorectal-liver-metastases-a-case-report
#8
Helen Cheung, Paul Karanicolas, Natalie Coburn, Calvin Law, Laurent Milot
Due to significant improvements in morbidity and mortality, surgery with curative intent is now the standard of care for patients with colorectal liver metastases who are surgical candidates. As a result, highly accurate preoperative per-lesion diagnosis is crucial. However, in some instances, this remains limited with standard techniques, including magnetic resonance imaging (MRI) with conventional contrast agents. Delayed retention of contrast of fibrotic liver metastases on MRI with extracellular contrast agents may mimic the late retention of contrast in hemangiomas and represent a diagnostic pitfall that limits diagnosis...
April 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29773823/comparison-of-conventional-sonographic-signs-and-magnetic-resonance-imaging-proton-density-fat-fraction-for-assessment-of-hepatic-steatosis
#9
Mimi Kim, Bo-Kyeong Kang, Dae Won Jun
This study correlated conventional ultrasonography (US) signs with the magnetic resonance imaging (MRI) proton density fat fraction (PDFF) to evaluate the diagnostic performance of US signs (alone or combined) to predict presence and degree of hepatic steatosis (HS). Overall, 182 subjects met the study inclusion criteria between February 2014 and October 2016. Four US signs were evaluated independently by two radiologists. MRI PDFF was defined as the average of 24 non-overlapping regions of interest (ROIs) within eight liver segments obtained by drawing three ROIs within each segment...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29771932/a-multi-center-preclinical-study-of-gadoxetate-dce-mri-in-rats-as-a-biomarker-of-drug-induced-inhibition-of-liver-transporter-function
#10
Anastassia Karageorgis, Stephen C Lenhard, Brittany Yerby, Mikael F Forsgren, Serguei Liachenko, Edvin Johansson, Mark A Pilling, Richard A Peterson, Xi Yang, Dominic P Williams, Sharon E Ungersma, Ryan E Morgan, Kim L R Brouwer, Beat M Jucker, Paul D Hockings
Drug-induced liver injury (DILI) is a leading cause of acute liver failure and transplantation. DILI can be the result of impaired hepatobiliary transporters, with altered bile formation, flow, and subsequent cholestasis. We used gadoxetate dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), combined with pharmacokinetic modelling, to measure hepatobiliary transporter function in vivo in rats. The sensitivity and robustness of the method was tested by evaluating the effect of a clinical dose of the antibiotic rifampicin in four different preclinical imaging centers...
2018: PloS One
https://www.readbyqxmd.com/read/29771727/modeling-gadoxetate-liver-uptake-and-efflux-using-dynamic-contrast-enhanced-magnetic-resonance-imaging-enables-preclinical-quantification-of-transporter-drug-drug-interactions
#11
Leonidas Georgiou, Jeffrey Penny, Glynis Nicholls, Neil Woodhouse, François-Xavier Blé, Josephine H Naish, Penny L Hubbard Cristinacce
OBJECTIVES: The aim of this study was to model the in vivo transporter-mediated uptake and efflux of the hepatobiliary contrast agent gadoxetate in the liver. The efficacy of the proposed technique was assessed for its ability to provide quantitative insights into drug-drug interactions (DDIs), using rifampicin as inhibitor. MATERIALS AND METHODS: Three groups of C57 mice were scanned twice with a dynamic gadoxetate-enhanced magnetic resonance imaging protocol, using a 3-dimensional spoiled gradient-echo sequence for approximately 72 minutes...
May 15, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29771049/-a-case-report-of-tracheotomy-complicated-by-hemorrhage-after-radical-operation-of-tongue
#12
M Y Sun, H J Wu
A 55-year old middle-aged male presented swelling lymph nodes in neck and mass in left tongue for three mouths. Physical examination shows a size 5 cm×5 cm mass in tongue and went over the midline. The mandibular lymph nodes were touched with moderate tenderness and little mobility in bilateral. The laboratory results, function of the kidney and heart liver, nasopharyngeal fiber area were basically normal. The result of CT and MRI shows the mass reached the lingual muscle layer and several suspected metastatic lymph nodes in neck...
May 20, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29770484/inter-method-reproducibility-of-biexponential-r-2-mr-relaxometry-for-estimation-of-liver-iron-concentration
#13
Ali Pirasteh, Qing Yuan, Diego Hernando, Scott B Reeder, Ivan Pedrosa, Takeshi Yokoo
PURPOSE: To assess the reproducibility of biexponential R2 -relaxometry MRI for estimation of liver iron concentration (LIC) between proprietary and nonproprietary analysis methods. METHODS: This single-center retrospective study, approved by investigational review board and compliant with the Health Insurance Portability and Accountability Act, included 40 liver MRI exams in 38 subjects with suspected or known iron overload. From spin-echo images of the liver, acquired at 5 different echo times (TE = 6-18 ms), biexponential R2 maps were calculated using 1 proprietary (FerriScan, Resonance Health Ltd...
May 16, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29770283/cardiac-amyloidosis-diagnosis-with-magnetic-resonance-imaging-a-case-report
#14
Meidi El Issa, Malik El Issa, Besma Sidia
Amyloidosis is a rare disease, which can affect various organs, such as the kidneys, heart, liver, respiratory and gastrointestinal tracts, and the nervous system. It still has a bad prognosis nowadays, despite chemotherapy and the new biotherapies. Its physiopathology corresponds to an irreversible, extracellular accumulation of fibrillous proteins in the tissues. Notwithstanding the fact that a clear diagnosis can be made with histology (of solid injured organs or a subcutaneous biopsy), magnetic resonance imaging (MRI) can show various advantages, especially to prove cardiac involvement, with great specificity and sensibility as well...
March 15, 2018: Curēus
https://www.readbyqxmd.com/read/29769185/unusual-case-of-iron-overload-with-cancer-mimicking-abdominal-splenosis
#15
Giacomo Marchi, Giacomo Avesani, Alberto Zamò, Domenico Girelli
A 48-year-old man, former alcohol abuser and drug addicted, was referred to our tertiary referral centre for iron disorders because of marked hyperferritinaemia. His clinical history revealed chronic hepatitis C, ß-thalassaemia trait and post-traumatic splenectomy at age of 22. MRI-estimated liver iron content was markedly elevated, while first-line genetic test for haemochromatosis was negative. Alpha-fetoprotein was increased but liver ultrasonography did not reveal focal liver lesions. Multiphasic contrast-enhanced CT confirmed this result but showed two abdominal masses (diameter of 9 cm and 7 cm, respectively) among bowel loops, strongly suspicious for cancer...
May 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29767320/post-hepatectomy-liver-failure-after-major-hepatic-surgery-not-only-size-matters
#16
Ulrika Asenbaum, Klaus Kaczirek, Ahmed Ba-Ssalamah, Helmut Ringl, Christoph Schwarz, Fredrik Waneck, Fabian Fitschek, Christian Loewe, Richard Nolz
OBJECTIVES: To compare the value of functional future liver remnant (functFLR) to established clinical and imaging variables in prediction of post-hepatectomy liver failure (PHLF) after major liver resection. METHODS: This retrospective, cross-sectional study included 62 patients, who underwent gadoxetic acid enhanced MRI and MDCT within 10 weeks prior to resection of ≥ 4 liver segments. Future liver remnant (FLR) was measured in MDCT using semi-automatic software...
May 16, 2018: European Radiology
https://www.readbyqxmd.com/read/29767297/magnetic-resonance-assessment-of-fetal-lung-maturity-comparison-between-signal-intensity-and-volume-measurement
#17
Ryo Ogawa, Tomoyuki Kido, Masashi Nakamura, Teruhito Kido, Teruhito Mochizuki, Takashi Sugiyama
PURPOSE: We evaluated the associations between gestational age (GA) and lung-to-liver signal intensity ratio (LLSIR) and fetal lung volume (FLV) using magnetic resonance imaging (MRI). Moreover, we evaluated the reproducibility of these measurements. MATERIALS AND METHODS: LLSIR and FLV were measured using single-shot fast spin-echo MRI in 88 consecutive fetuses. The Spearman test was used to assess the relationships between (1) LLSIR and GA, and (2) FLV and GA in 81 fetuses without lung abnormalities...
May 16, 2018: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29765787/liver-failure-and-conjugated-hyperbilirubinemia-in-a-preterm-neonate-role-of-early-ivig-and-exchange-transfusion
#18
Jayasree Nair, Vasantha H S Kumar
Neonatal liver failure (NLF) is a rare diagnosis but carries with it significant risks of mortality and morbidity. Common etiologies for NLF include metabolic causes, gestational alloimmune liver disease (GALD or neonatal hemochromatosis), and viral infections. We report a case of liver failure in a premature infant with abnormal iron profile within 48 hours of birth. Lack of accepted guidelines for the initial management of severe jaundice with a high direct component in the first week after birth made treatment challenging...
April 2018: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/29764827/not-so-mass-effect-finding-of-a-remarkable-incidentaloma-in-a-teenager-with-neurofibromatosis
#19
Daniel John Keen, Hannah Norman-Bruce, Salah Mansy
A 13-year-old boy with neurofibromatosis type 1 presented to the emergency department twice in a fortnight with moderate intermittent abdominal pain, radiating to the back and associated with nausea and vomiting. He examined as a well child with a soft abdomen and minimal tenderness. A history of constipation was identified but he failed to respond to a trial of laxatives. Subsequent ultrasound abdomen demonstrated a large mass surrounding the porta hepatis. MRI further characterised a focal, non-aggressive lesion extending from his liver, encapsulating his pancreas, portal vessels and laterally displacing his spleen and left kidney...
May 14, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29761451/influence-of-arm-position-and-respiration-technique-during-liver-examinations-on-the-detectability-of-mammary-lesions
#20
Yasuo Takatsu, Yuko Shimada, Tosiaki Miyati, Toshiki Shiozaki, Katsusuke Kyotani
During liver computed tomography (CT), scanning is performed with the raised arm position and an inhalation technique. However, for liver magnetic resonance imaging (MRI), the arms are placed at the sides of the body and an exhalation technique is used. This study was aimed at evaluating the effect that the patient's arm position and respiration technique had on the ability to detect mammary glands in the scan range to discover unexpected mammary lesions during the liver MRI examination. Liver MRI and CT images were compared for 337 female patients...
May 14, 2018: Radiological Physics and Technology
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