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Liver imaging

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https://www.readbyqxmd.com/read/29667888/liver-calcifications-and-calcified-liver-masses-pattern-recognition-approach-on-ct
#1
Madhavi Patnana, Christine O Menias, Perry J Pickhardt, Mohamed Elshikh, Sanaz Javadi, Ayman Gaballah, Akram M Shaaban, Brinda Rao Korivi, Naveen Garg, Khaled M Elsayes
OBJECTIVE: Because of the ubiquitous use of radiologic imaging, particularly with CT, the detection of focal hepatic calcifications has increased. Calcifications can be seen in cystic and solid masses associated with both benign and malignant causes, pseudomasses, and miscellaneous pathologic abnormalities. CONCLUSION: These calcifications can manifest in various patterns, recognition of which can increase specificity for various diagnoses. In this article, we review a wide range of calcified hepatic pathologic abnormalities at CT and propose an approach for diagnosis...
April 18, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29666974/fem-based-elasticity-reconstruction-using-ultrasound-for-imaging-tissue-ablation
#2
Corin F Otesteanu, Valery Vishnevsky, Orcun Goksel
PURPOSE: Success of ablation treatment depends on the accurate placement of the target ablation focus and the complete destruction of the pathological tissue. Thus, monitoring the formation, location, and size of the ablated lesion is essential. As ablated tissue gets stiffer, an option for ablation monitoring is ultrasound elastography, for imaging the tissue mechanical properties. Reconstruction of elasticity distribution can be achieved by solving an inverse problem from observed displacements, based on a deformable tissue model, commonly discretized by the finite element method (FEM)...
April 17, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29666972/initial-experience-with-a-sipm-based-pet-ct-scanner-influence-of-acquisition-time-on-image-quality
#3
Ida Sonni, Lucia Baratto, Sonya Park, Negin Hatami, Shyam Srinivas, Guido Davidzon, Sanjiv Sam Gambhir, Andrei Iagaru
BACKGROUND: A newly introduced PET/CT scanner (Discovery Meaningful Insights-DMI, GE Healthcare) includes the silicon photomultiplier (SiPM) with time-of-flight (TOF) technology first used in the GE SIGNA PET/MRI. In this study, we investigated the impact of various acquisition times on image quality using this SiPM-based PET/CT. METHODS: We reviewed data from 58 participants with cancer who were scanned using the DMI PET/CT scanner. The administered dosages ranged 295...
April 18, 2018: EJNMMI Physics
https://www.readbyqxmd.com/read/29666951/predicting-chemotherapeutic-response-for-colorectal-liver-metastases-using-relative-tumor-enhancement-of-gadoxetic-acid-disodium-enhanced-magnetic-resonance-imaging
#4
Shinichi Murata, Shigeru Matsushima, Yozo Sato, Hidekazu Yamaura, Mina Kato, Takaaki Hasegawa, Kei Muro, Yoshitaka Inaba
PURPOSE: This study aimed to predict the treatment response for colorectal liver metastases (CLM) using relative tumor enhancement (RTE) of the hepatobiliary phase (HBP) for patients with no history of chemotherapy. MATERIALS AND METHODS: In this retrospective study, we enrolled 26 patients [14 males, 12 females; median age: 58 years (range 37-82 years)] with CLM and no history of chemotherapy between December 2011 and May 2017. Gadoxetic acid-enhanced magnetic resonance imaging was performed before starting chemotherapy and RTE of HBP...
April 17, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29666743/an-extremely-rare-bile-leakage-aberrant-bile-duct-in-left-triangular-ligament-appendix-fibrosa-hepatis
#5
İhsan Yıldız, Yavuz Savaş Koca, Sezayi Kantar
Background: The anatomical variability of bile ducts can leave surgeons in very difficult conditions.Ultrasonography, computed tomography, magnetic resonance imaging (MRCP) and endoscopic imaging methods are used in diagnosis. In addition to conservative approaches, endoscopic procedures and laparoscopic or open surgical interventions may be necessary for treatment. In this article, we present a case of aberrant bile duct in left triangular ligament (appendix fibrosa hepatis), which is rarely seen...
2018: Case Reports in Surgery
https://www.readbyqxmd.com/read/29665631/primary-colonic-follicular-lymphoma-presenting-as-four-diminutive-sessile-polyps-found-incidentally-during-colonoscopy
#6
Sun Jin, Hyun Seok Lee, Ji Yun Jeong, Young Wook Jo
Follicular lymphomas, which typically arise in the lymph nodes with spleen, liver, and bone marrow involvement, have generally low occurrence rates in Asian countries as compared with Western countries. Follicular lymphomas of the gastrointestinal tract are rare, and primary colonic follicular lymphomas are particularly rare compared with others found in the small intestine and duodenum. Colonoscopic imaging of colonic lymphomas, including follicular lymphoma, may reveal mucosal ulcerations, erosions, indurations, polypoid mass-like lesions, and diffuse mucosal nodularity...
April 18, 2018: Clinical Endoscopy
https://www.readbyqxmd.com/read/29665193/validation-of-a-motion-robust-2d-sequential-technique-for-quantification-of-hepatic-proton-density-fat-fraction-during-free-breathing
#7
B Dustin Pooler, Diego Hernando, Jeannine A Ruby, Hiroshi Ishii, Ann Shimakawa, Scott B Reeder
BACKGROUND: Current chemical-shift-encoded (CSE) MRI techniques for measuring hepatic proton density fat fraction (PDFF) are sensitive to motion artifacts. PURPOSE: Initial validation of a motion-robust 2D-sequential CSE-MRI technique for quantification of hepatic PDFF. STUDY TYPE: Phantom study and prospective in vivo cohort. POPULATION: Fifty adult patients (27 women, 23 men, mean age 57.2 years). FIELD STRENGTH/SEQUENCE: 3D, 2D-interleaved, and 2D-sequential CSE-MRI acquisitions at 1...
April 17, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29665034/metabolic-features-of-nonalcoholic-fatty-liver-nafl-in-obese-adolescents-findings-from-a-multi-ethnic-cohort
#8
Domenico Tricò, Sonia Caprio, Giuseppina Rosaria Umano, Bridget Pierpont, Jessica Nouws, Alfonso Galderisi, Grace Kim, Mariana M Mata, Nicola Santoro
AIMS: We conducted a prospective study in a large, multiethnic cohort of obese adolescents to characterize clinical and genetic features associated with pediatric Non-Alcoholic Fatty Liver (NAFL), the most common cause of chronic liver disease in youth. METHODS: A total of 503 obese adolescents were enrolled, including 191 (38.0%) Caucasians, 134 (26.6%) African Americans, and 178 (35.4%) Hispanics. Participants underwent abdominal magnetic resonance imaging (MRI) to quantify hepatic fat content, an oral glucose tolerance test to assess glucose tolerance and insulin sensitivity, and the genotyping of three SNPs associated with fatty liver (PNPLA3 rs738409, GCKR rs1260326, and TM6SF2 rs58542926)...
April 17, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29663858/assessment-of-liver-and-cardiac-iron-overload-using-mri-in-patients-with-chronic-anemias-in-latin-american-countries-results-from-asimila-study
#9
Rodolfo Cancado, Nora P Watman, Clarisse Lobo, Zulay Chona, Fernando Manzur, Fabiola Traina, Miriam Park, Guillermo Drelichman, Juan Pablo Zarate, Luis Marfil
OBJECTIVES: A multicenter, noninterventional, observational study was conducted in the Latin American countries including Argentina, Brazil, Colombia, Mexico, and Venezuela to assess the prevalence of liver and cardiac iron overload using magnetic resonance imaging (MRI) in patients with chronic anemias except thalassemia. METHODS: Patients aged >10 years with transfusion-dependent anemias, except thalassemia, either with <20 units of red blood cell (RBC) transfusions with serum ferritin (SF) levels >2000 ng/mL or with ≥20 units of RBC transfusions regardless of SF level in their lifetime, were enrolled...
April 17, 2018: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29663273/in-vivo-estimation-of-target-registration-errors-during-augmented-reality-laparoscopic-surgery
#10
Stephen Thompson, Crispin Schneider, Michele Bosi, Kurinchi Gurusamy, Sébastien Ourselin, Brian Davidson, David Hawkes, Matthew J Clarkson
PURPOSE: Successful use of augmented reality for laparoscopic surgery requires that the surgeon has a thorough understanding of the likely accuracy of any overlay. Whilst the accuracy of such systems can be estimated in the laboratory, it is difficult to extend such methods to the in vivo clinical setting. Herein we describe a novel method that enables the surgeon to estimate in vivo errors during use. We show that the method enables quantitative evaluation of in vivo data gathered with the SmartLiver image guidance system...
April 16, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29663188/magnetic-resonance-imaging-during-management-of-patients-with-transfusion-dependent-thalassemia-a-single-center-experience
#11
Zeynep Karakas, Yasin Yilmaz, Zuhal Bayramoglu, Serap Karaman, Selime Aydogdu, Ayse Ozkan Karagenc, Deniz Tugcu, Memduh Dursun
BACKGROUND: Cardiac and hepatic magnetic resonance imaging evaluation during treatment can tailor physicians' chelation therapy titrations. AIM: The aim of the study was to assess the relationship of cardiac and hepatic T2* values with chelation therapy in patients with transfusion-dependent thalassemia (TDT). METHODS: A total of 106 patients with TDT who were followed up in Istanbul Medical Faculty Thalassemia Center were evaluated for the study...
April 16, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29663140/poorly-differentiated-ductal-adenocarcinoma-of-the-pancreas-with-rapid-progression-in-a-young-man
#12
Koji Tezuka, Tomoharu Ishiyama, Akiko Takeshita, Hidekazu Matsumoto, Akira Jingu, Jiro Kikuchi, Hideyuki Yamaya, Rintaro Ohe, Tetsuya Ishizawa
Pancreatic cancer in young adults is very rare. We report a case of young-onset poorly differentiated pancreatic ductal adenocarcinoma with rapid progression and poor prognosis in a 31-year-old Japanese man with no obvious family history of malignancy. Preoperative examinations revealed a mass lesion in the body of the pancreas, accompanied by a slightly dilated main pancreatic duct distal to the mass lesion. Pancreatic cancer with acute pancreatitis was suspected because of an elevation of serum pancreatic enzyme and tumor marker, along with imaging findings...
April 16, 2018: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/29662930/biliary-atresia-clinical-series
#13
Bárbara Neto, Mariana Borges-Dias, Eunice Trindade, José Estevão-Costa, José Miguel Campos
Introduction: Biliary atresia is the main cause of death by hepatic failure and the main indication for liver transplant in children. This study aims to analyze the population with this diagnosis, treated between 2000 and 2015 at Hospital de São João. Material and Methods: Descriptive, observational, and retrospective study, including the patients with biliary atresia, diagnosed and treated between January 1, 2000 and December 31, 2015. We analyzed epidemiologic, clinical, biochemical, and image data, as well as registered complications and present status...
March 2018: GE Portuguese Journal of Gastroenterology
https://www.readbyqxmd.com/read/29662918/gifted-demons-deformable-image-registration-with-local-structure-preserving-regularization-using-supervoxels-for-liver-applications
#14
Bartłomiej W Papież, James M Franklin, Mattias P Heinrich, Fergus V Gleeson, Michael Brady, Julia A Schnabel
Deformable image registration, a key component of motion correction in medical imaging, needs to be efficient and provides plausible spatial transformations that reliably approximate biological aspects of complex human organ motion. Standard approaches, such as Demons registration, mostly use Gaussian regularization for organ motion, which, though computationally efficient, rule out their application to intrinsically more complex organ motions, such as sliding interfaces. We propose regularization of motion based on supervoxels, which provides an integrated discontinuity preserving prior for motions, such as sliding...
April 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29662563/-123-i-labeled-oxldl-is-widely-distributed-throughout-the-whole-body-in-mice
#15
Atushi Nakano, Hidekazu Kawashima, Yoshinori Miyake, Tsutomu Zeniya, Akihide Yamamoto, Kazuhiro Koshino, Takashi Temma, Tetsuya Fukuda, Yoshiko Fujita, Akemi Kakino, Shigehiko Kanaya, Tatsuya Sawamura, Hidehiro Iida
Purpose: Oxidized low-density lipoprotein (oxLDL) plays a key role in endothelial dysfunction, vascular inflammation, and atherogenesis. The aim of this study was to assess blood clearance and in vivo kinetics of radiolabeled oxLDL in mice. Methods: We synthesized 123 I-oxLDL by the iodine monochloride method, and performed an uptake study in CHO cells transfected with lectin-like oxLDL receptor-1 (LOX-1). In addition, we evaluated the consistency between the 123 I-oxLDL autoradiogram and the fluorescence image of DiI-oxLDL after intravenous injection for both spleen and liver...
April 2018: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29661994/baseline-apparent-diffusion-coefficient-as-a-predictor-of-response-to-liver-directed-therapies-in-hepatocellular-carcinoma
#16
Andrew Niekamp, Reham Abdel-Wahab, Joshua Kuban, Bruno C Odisio, Armeen Mahvash, Manal M Hassan, Aliya Qayyum, Ahmed Kaseb, Rahul A Sheth
Predicting outcomes in patients with hepatocellular carcinoma (HCC) who undergo locoregional therapies remains a substantial clinical challenge. The purpose of this study was to investigate pre-procedure diffusion weighted magnetic resonance imaging (DW-MRI) as an imaging biomarker for tumoral response to therapy for patients with HCC undergoing drug eluting embolic (DEE) chemoembolization and radioembolization. A retrospective review of HCC patients who underwent DEE chemoembolization or radioembolization was performed...
April 14, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29661601/corrigendum-to-evaluation-of-texture-analysis-parameter-for-response-prediction-in-patients-with-hepatocellular-carcinoma-undergoing-drug-eluting-bead-transarterial-chemoembolization-deb-tace-using-biphasic-contrast-enhanced-ct-image-data-correlation-with-liver
#17
Christopher Kloth, Wolfgang Maximilian Thaiss, Rainer Kärgel, Rainer Grimmer, Jan Fritz, Sorin Dumitru Ioanoviciu, Dominik Ketelsen, Konstantin Nikolaou, Marius Horger
No abstract text is available yet for this article.
April 13, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29661435/transient-elastography-in-acute-cellular-rejection-following-liver-transplantation-systematic-review
#18
L S Nacif, C D C Gomes, M N Mischiatti, V Kim, D Paranaguá-Vezozzo, G L Reinoso, F J Carrilho, L C D'Albuquerque
BACKGROUND: Transient elastography (TE) is a noninvasive technique that measures liver stiffness. When an inflammatory process is present, this is shown by elevated levels of stiffness. Acute cellular rejection (ACR) is a consequence of an inflammatory response directed at endothelial and bile epithelial cells, and it is diagnosed through liver biopsy. This is a systematic review of the viability of TE in ACR following liver transplantation. METHODS: The Cochrane Library, Embase, and Medline PubMed databases were searched and updated to November 2016...
April 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29661294/serum-lactate-predicts-resource-utilization-but-not-surgical-need-in-the-emergency-department
#19
Carly Richards, Kelli Ishihara, Cary Grayson, Michael Lustik, Christopher Yheulon
BACKGROUND: Serum lactate is frequently tested in the emergency department (ED) setting to diagnose visceral ischemia and as a marker of end-organ perfusion. It is highly nonspecific, and levels can be affected by both kidney and liver function. In this retrospective chart review, we aim to demonstrate that serum lactate is overused in the ED setting and predicts resource utilization but not the need for surgical intervention. METHODS: ED records with a chief complaint of "abdominal pain" were queried for the preceding 12 mo...
June 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29660928/adrenal-schwannoma-ct-mr-manifestations-and-pathological-correlation
#20
Wei Tang, Xiang-Rong Yu, Liang-Ping Zhou, Hong-Bo Gao, Qi-Feng Wang, Wei-Jun Peng
OBJECTIVES: This study aimed to describe the computed tomography (CT), magnetic resonance imaging (MRI) imaging features of adrenal schwannoma and to correlate imaging findings with histopathologic findings. METHODS: The findings from multiphase CT or MRI examinations of seventeen patients with histopathologically confirmed adrenal schwannoma were reviewed. The imaging criteria included shape, size, margin, attenuation, signal intensity, secondary degeneration, and internal mass enhancement pattern...
2018: Clinical Hemorheology and Microcirculation
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