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Liver anatomy

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https://www.readbyqxmd.com/read/27913913/improved-image-quality-in-abdominal-ct-in-patients-who-underwent-treatment-for-hepatocellular-carcinoma-with-small-metal-implants-using-a-raw-data-based-metal-artifact-reduction-algorithm
#1
Keitaro Sofue, Takeshi Yoshikawa, Yoshiharu Ohno, Noriyuki Negi, Hiroyasu Inokawa, Naoki Sugihara, Kazuro Sugimura
OBJECTIVES: To determine the value of a raw data-based metal artifact reduction (SEMAR) algorithm for image quality improvement in abdominal CT for patients with small metal implants. METHODS: Fifty-eight patients with small metal implants (3-15 mm in size) who underwent treatment for hepatocellular carcinoma were imaged with CT. CT data were reconstructed by filtered back projection with and without SEMAR algorithm in axial and coronal planes. To evaluate metal artefact reduction, mean CT number (HU and SD) and artefact index (AI) values within the liver were calculated...
December 2, 2016: European Radiology
https://www.readbyqxmd.com/read/27904249/benign-biliary-strictures
#2
REVIEW
Ashley Altman, Steven M Zangan
Differentiating benign and malignant biliary strictures is a challenging and important clinical scenario. The typical presentation is indolent and involves elevation of liver enzymes, constitutional symptoms, and obstructive jaundice with or without superimposed or recurrent cholangitis. While overall the most common causes of biliary strictures are malignant, including cholangiocarcinoma and pancreatic adenocarcinoma, benign strictures encompass a wide spectrum of etiologies including iatrogenic, autoimmune, infectious, inflammatory, and congenital...
December 2016: Seminars in Interventional Radiology
https://www.readbyqxmd.com/read/27894188/challenges-of-endoscopic-management-of-pancreaticobiliary-complications-in-surgically-altered-gastrointestinal-anatomy
#3
REVIEW
Tin Moe Wai, Eun Young Kim
Pancreaticobiliary complications following various surgical procedures, including liver transplantation, are not uncommon and are important causes of morbidity and mortality. Therapeutic endoscopy plays a substantial role in these patients and can help to avoid the need for reoperation. However, the endoscopic approach in patients with surgically altered gastrointestinal (GI) anatomy is technically challenging because of the difficulty in entering the enteral limb to reach the target orifice to manage pancreaticobiliary complications...
November 2016: Clinical Endoscopy
https://www.readbyqxmd.com/read/27857464/the-abernethy-malformation-myriad-imaging-manifestations-of-a-single-entity
#4
Samarjit S Ghuman, Saumya Gupta, T B S Buxi, Kishan S Rawat, Anurag Yadav, Naimish Mehta, Seema Sud
Abernethy malformation, also known as congenital extrahepatic portosystemic shunts (CEPS) is a rare clinical entity and manifests with different clinical symptoms. CEPS are abnormalities of vascular development where there is shunting of portal blood into the systemic venous system. Multidetector computed tomography (MDCT) is a fast and effective modality for evaluation of CEPS. CT displays all the information desired by the surgeon as well as the clinician including the anatomy of the splenic and superior mesenteric veins, size and site of the shunt, presence or absence of the portal vein radicles, and helps to plan the therapy and even the follow-up of these patients...
July 2016: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/27852277/right-hepatectomy-for-a-detoured-left-hepatic-artery-in-hilar-cholangiocarcinoma-report-of-a-rare-but-rational-resection
#5
Chun-Yi Tsai, Nobuyuki Watanabe, Tomoki Ebata, Takashi Mizuno, Yuzuru Kamei, Masato Nagino
BACKGROUND: Curative hepatectomy with bile duct resection is the treatment for perihilar cholangiocarcinoma. A locally advanced tumor necessitates hepatectomy with simultaneous vascular resection, and reconstruction remains an obstacle for surgeons. Studies have focused on the variations of hepatic arteries. Nevertheless, the anatomical alignment of the portal veins, bile ducts, and hepatic arteries are equally critical in surgical planning of curative resection for advanced tumors. We have reported promising outcomes of hepatectomy with simultaneous resection and reconstruction of the hepatic artery...
November 16, 2016: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27825795/an-mri-based-mid-ventilation-approach-for-radiotherapy-of-the-liver
#6
Tessa N van de Lindt, Gerald Schubert, Uulke A van der Heide, Jan-Jakob Sonke
MRI is increasingly being used in radiotherapy of the liver. The purpose of this study was to develop and validate a strategy to acquire MR images for treatment planning and image guidance in the presence of respiratory motion. By interleaving two navigator triggered MRI sequences, a fast but low-resolution image in mid-ventilation (midV) and a high-resolution image in exhale were acquired efficiently. Deformable registration was applied to map the exhale image to the midV anatomy. Cine-MRI scans were acquired for motion quantification...
November 5, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27824022/endoscopic-ultrasound-of-the-hepatoduodenal-ligament-and-liver-hilum
#7
Malay Sharma, Chittapuram Srinivasan Rameshbabu, Christoph F Dietrich, Praveer Rai, Raghav Bansal
The porta hepatis and hepatoduodenal ligament (HDL) are important anatomical pathways of extension of disease to and from the liver. The imaging of this area is difficult. The role of endoscopic ultrasound (EUS) as an imaging modality for hepatoduodenal ligament has not been established so far. All images in the present study have been generated from a detailed review of real time recordings using the curved linear scanning echoendoscope EG -3830 UT (Pentax Corporation, Tokyo, Japan), coupled with a Hitachi avius and Hitach 7500 processor (Hitachi Aloka Medical, Tokyo Japan)...
November 8, 2016: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/27822720/portal-supply-and-venous-drainage-of-the-caudate-lobe-in-the-healthy-human-liver-virtual-three-dimensional-computed-tomography-volume-study
#8
T Benkö, G Sgourakis, E P Molmenti, H O Peitgen, A Paul, S Nadalin, T Schroeder, A Radtke
OBJECTIVE: The venous vascular anatomy of the caudate lobe is exceptional. The purpose of this study was to assess portal inflow and venous outflow volumes of the caudate lobe. METHODS: Extrahepatic (provided by the first-order branches) versus intrahepatic (provided by the second- to third-order branches) portal inflow, as well as direct (via Spieghel veins) versus indirect (via hepatic veins) venous drainage patterns were analyzed in virtual 3-D liver maps in 140 potential live liver donors...
November 7, 2016: World Journal of Surgery
https://www.readbyqxmd.com/read/27808040/endobarrier-gastrointestinal-liner-delineation-of-underlying-mechanisms-and-clinical-effects
#9
Ulrich Rohde
Bariatric surgery (e.g. Roux-en-Y gastric bypass (RYGB)) has proven the most effective way of achieving sustainable weight losses and remission of type 2 diabetes (T2D). Studies indicate that the effectiveness of RYGB is mediated by an altered gastrointestinal tract anatomy, which in particular favours release of the gut incretin hormone glucagon-like peptide-1 (GLP-1). The EndoBarrier gastrointestinal liner or duodenal-jejunal bypass sleeve (DJBS) is an endoscopic deployable minimally invasive and fully reversible technique designed to mimic the bypass component of the RYGB...
November 2016: Danish Medical Journal
https://www.readbyqxmd.com/read/27790413/variations-in-the-origin-and-course-of-right-hepatic-artery-and-its-surgical-significance
#10
Narayanaperumal Mugunthan, Rajendran Kannan, Christilda Felicia Jebakani, Jayaram Anbalagan
INTRODUCTION: Variations in the Right Hepatic Artery (RHA) are exceedingly common and these variations are of great importance to surgeons and interventional radiologists. A thorough knowledge of the right hepatic arterial anatomy is mandatory while performing hepatic surgery and hepatic arteriography. AIM: To find out the variations in the origin and course of the RHA and its surgical significance. MATERIALS AND METHODS: This study was conducted in 60 embalmed adult cadavers of both sexes of age group between 50 to 80 years...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27787439/damage-control-surgery-in-weightlessness-a-comparative-study-of-simulated-torso-hemorrhage-control-comparing-terrestrical-and-weightless-conditions
#11
Andrew W Kirkpatrick, Jessica Lynn McKee, Homer Tien, Anthony J LaPorta, Kit Lavell, Tim Leslie, David R King, Paul B McBeth, Susan Brien, Derek J Roberts, Reginald Franciose, Jonathan Wong, Vivian McAlistatair, Danielle Bouchard, Chad G Ball
INTRODUCTION: Torso bleeding remains the most preventable cause of post-traumatic death worldwide. Remote Damage Control Resuscitation (RDCR) endeavours to rescue the most catastrophically injured, but has not focused on pre-hospital surgical torso haemorrhage control (HC). We examined the logistics and metrics of intra-peritoneal packing in weightlessness in Parabolic flight (0g) compared to terrestrial gravity (1g) as an extreme example of surgical RDCR. METHODS: A surgical simulator was customized with high-fidelity intra-peritoneal anatomy, a "blood" pump and flow-meter...
October 25, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27783314/space-occupying-lesions-in-the-liver
#12
REVIEW
Manigandan Subramanyam Thyagarajan, Khalid Sharif
Space occupying liver lesions usually present with abdominal pain or abnormal physical findings, such as a palpable abdominal mass or distention. Liver lesions identified in children include benign and malignant neoplasms, inflammatory masses, cysts and metastatic lesions. Two-thirds of liver lesions in children are malignant. Hepatoblastoma accounts for two-thirds of malignant liver tumors in children. Benign lesions of the liver in children include vascular lesions, hamartomas, adenomas, and focal nodular hyperplasia...
October 25, 2016: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/27775870/arterial-blood-supply-of-liver-segment-iv-and-its-possible-surgical-consequences
#13
Thamer Alghamdi, Christoph Viebahn, Christoph Justinger, Thomas Lorf
The risk of ischemia of segment IV after split liver resection is high. This anatomical study was done to identify the arterial blood supply and the intrahepatic distribution of liver segment IV. The anatomy of segment IV was studied in 29 livers from adult cadavers. To identify the arterial blood supply of segment IV, water and ink were injected into the various branches of the hepatic artery and the outflow through segment IV and discoloration of the liver parenchyma were observed. In 23 of the 29 livers (79...
October 24, 2016: American Journal of Transplantation
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
#14
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/27766112/wses-classification-and-guidelines-for-liver-trauma
#15
Federico Coccolini, Fausto Catena, Ernest E Moore, Rao Ivatury, Walter Biffl, Andrew Peitzman, Raul Coimbra, Sandro Rizoli, Yoram Kluger, Fikri M Abu-Zidan, Marco Ceresoli, Giulia Montori, Massimo Sartelli, Dieter Weber, Gustavo Fraga, Noel Naidoo, Frederick A Moore, Nicola Zanini, Luca Ansaloni
The severity of liver injuries has been universally classified according to the American Association for the Surgery of Trauma (AAST) grading scale. In determining the optimal treatment strategy, however, the haemodynamic status and associated injuries should be considered. Thus the management of liver trauma is ultimately based on the anatomy of the injury and the physiology of the patient. This paper presents the World Society of Emergency Surgery (WSES) classification of liver trauma and the management Guidelines...
2016: World Journal of Emergency Surgery: WJES
https://www.readbyqxmd.com/read/27742541/simulated-online-adaptive-magnetic-resonance-guided-stereotactic-body-radiation-therapy-for-the-treatment-of-oligometastatic-disease-of-the-abdomen-and-central-thorax-characterization-of-potential-advantages
#16
Lauren Henke, Rojano Kashani, Deshan Yang, Tianyu Zhao, Olga Green, Lindsey Olsen, Vivian Rodriguez, H Omar Wooten, H Harold Li, Yanle Hu, Jeffrey Bradley, Clifford Robinson, Parag Parikh, Jeff Michalski, Sasa Mutic, Jeffrey R Olsen
PURPOSE: To characterize potential advantages of online-adaptive magnetic resonance (MR)-guided stereotactic body radiation therapy (SBRT) to treat oligometastatic disease of the non-liver abdomen and central thorax. METHODS AND MATERIALS: Ten patients treated with RT for unresectable primary or oligometastatic disease of the non-liver abdomen (n=5) or central thorax (n=5) underwent imaging throughout treatment on a clinical MR image guided RT system. The SBRT plans were created on the basis of tumor/organ at risk (OAR) anatomy at initial computed tomography simulation (PI), and simulated adaptive plans were created on the basis of observed MR image set tumor/OAR "anatomy of the day" (PA)...
December 1, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/27742304/right-accessory-hepatic-artery-arising-from-celiac-trunk-case-report-of-a-variation-that-must-be-looked-for-during-multiorgan-procurement
#17
D Bastos-Neves, J A da Silva Alves, L G Guedes Dias, M B de Rezende, P R Salvalaggio
Knowledge of the anatomy of the hepatic artery and its variations is important to hepatobiliary and liver transplant surgeons and interventional radiologists. We report a rare anatomic variation of liver hepatic arterial supply: a right accessory hepatic artery arising directly from the celiac trunk and observed at the time of multiorgan procurement. The anatomic variation described in this case occurs in up to 2% of cases and their knowledge is essential to avoid injuries during multiorgan procurement that could require multiple anastomoses or lead to inadvertent vessel injury...
September 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27741043/eversion-technique-to-prevent-biliary-stricture-after-living-donor-liver-transplantation-in-the-universal-minimal-hilar-dissection-era
#18
Toru Ikegami, Tomonari Shimagaki, Junji Kawasaki, Tomoharu Yoshizumi, Hideaki Uchiyama, Noboru Harada, Norifumi Harimoto, Shinji Itoh, Yuji Soejima, Yoshihiko Maehara
INTRODUCTION: Biliary anastomosis stricture (BAS) is still among the major concerns after living donor liver transplantation (LDLT), even after the technical refinements including the universal use of the blood flow-preserving hilar dissection technique. The aim of this study is to investigate what are still the factors for BAS after LDLT. METHODS: An analysis of 279 adult-to-adult LDLT grafts (left lobe, n=161; right lobe, n=118) with duct-to-duct (DD) biliary reconstruction, since the universal application of minimal hilar dissection technique and gradual introduction of eversion technique, was performed...
October 12, 2016: Transplantation
https://www.readbyqxmd.com/read/27731302/cross-sectional-imaging-of-congenital-and-acquired-abnormalities-of-the-portal-venous-system
#19
Mustafa Özbayrak, Servet Tatlı
Knowing the normal anatomy, variations, congenital and acquired pathologies of the portal venous system are important, especially when planning liver surgery and percutaneous interventional procedures. The portal venous system pathologies can be congenital such as agenesis of portal vein (PV) or can be involved by other hepatic disorders such as cirrhosis and malignancies. In this article, we present normal anatomy, variations, and acquired pathologies involving the portal venous system as seen on computed tomography (CT) and magnetic resonance imaging (MRI)...
November 2016: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/27714420/3d-t2-weighted-and-gd-eob-dtpa-enhanced-3d-t1-weighted-mr-cholangiography-for-evaluation-of-biliary-anatomy-in-living-liver-donors
#20
Larry Cai, Benjamin M Yeh, Antonio C Westphalen, John Roberts, Zhen J Wang
PURPOSE: To investigate whether the addition of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced 3D T1-weighted MR cholangiography (T1w-MRC) to 3D T2-weighted MRC (T2w-MRC) improves the confidence and diagnostic accuracy of biliary anatomy in living liver donors. METHODS: Two abdominal radiologists retrospectively and independently reviewed pre-operative MR studies in 58 consecutive living liver donors. The second-order bile duct visualization on T1w- and T2w-MRC images was rated on a 4-point scale...
October 7, 2016: Abdominal Radiology
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