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Liver anatomy

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https://www.readbyqxmd.com/read/28078375/assessing-intra-arterial-complications-of-planning-and-treatment-angiograms-for-y-90-radioembolization
#1
Osman Ahmed, Mikin V Patel, Abdulrahman Masrani, Bradford Chong, Mohammed Osman, Jordan Tasse, Jayesh Soni, Ulku Cenk Turba, Bulent Arslan
PURPOSE: To report hepatic arterial-related complications encountered during planning and treatment angiograms for radioembolization and understand any potential-associated risk factors. MATERIALS AND METHODS: 518 mapping or treatment angiograms for 180 patients with primary or metastatic disease to the liver treated by Yttrium-90 radioembolization between 2/2010 and 12/2015 were retrospectively reviewed. Intra-procedural complications were recorded per SIR guidelines...
January 11, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28066983/endoscopic-ultrasound-guided-antegrade-biliary-stenting-for-unresectable-malignant-biliary-obstruction-in-patients-with-surgically-altered-anatomy-a-single-center-prospective-pilot-study
#2
Takuji Iwashita, Ichiro Yasuda, Tsuyoshi Mukai, Keisuke Iwata, Shinpei Doi, Shinya Uemura, Masatoshi Mabuchi, Mitsuru Okuno, Masahito Shimizu
BACKGROUND AND AIMS: Endoscopic retrograde cholangiography (ERCP) with biliary stenting for the treatment of unresectable malignant biliary obstruction (MBO) is challenging among patients with surgically altered anatomy. Endoscopic ultrasound-guided antegrade biliary stenting (EUS-ABS) was introduced as an alternative biliary drainage method, although it has not been well studied yet. In this single-center prospective pilot study, we aimed to evaluate the feasibility and safety of EUS-ABS for MBO in patients with surgically altered anatomy...
January 9, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28047839/th-cd-206-08-an-anthropopathic-deformable-phantom-for-geometric-and-dose-accumulation-accuracy-validation-of-deformable-image-registration
#3
Y Liao, H Chen, J Chen, X Gu, X Zhen, L Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropopathic abdominal phantom for evaluating deformable image registration (DIR) accuracy on images and dose deformation in adaptive radiation therapy (ART). METHOD: Organ moulds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, are 3D printed using the contours from an ovarian cancer patient. The organ moulds are molded with deformable gels that made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047754/su-f-t-644-reproducibility-of-target-position-using-moderate-voluntary-breath-hold-during-liver-stereotactic-ablative-radiotherapy
#4
G Cui, N Trakul, E Chang, A Shiu
PURPOSE: To evaluate the reproducibility of target position using moderate voluntary breath-hold during liver stereotactic ablative radiotherapy (SABR). METHODS: Two patients who underwent liver SABR on a Varian TrueBeam STx linac were used for this study. Fiducial markers were placed in and around the target in the liver as surrogates for the target position and motion. GTVs were contoured by assessing tumor extent on contrast enhanced CT. The PTV was created from the GTV by adding 2 mm margins to account for the residual motion during breath-holds...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047564/su-f-j-221-adjusted-dose-and-its-relation-to-radiation-induced-liver-disease-during-hepatocellular-carcinoma-radiotherapy
#5
P Huang, H Li, J Chen, C Ma, Y Gang, S Qin, Y Yin, D Li
PURPOSE: Many patients with hepatocellular carcinoma (HCC) had hepatic anatomy variations as a result of inter-fraction deformation during fractionated radiotherapy, which may result in difference from the planned dose. This study aimed to investigate the relationship between adjusted dose and radiation induced liver disease (RILD) in HCC patients receiving three dimensional conformal radiotherapy (3DCRT). METHODS: Twenty-three HCC patients received conventional fractionated 3DCRT were enrolled in this retrospective investigation...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046398/su-g-jep2-07-fusion-optimization-of-multi-contrast-mri-scans-for-mr-based-treatment-planning
#6
L Zhang, F Yin, X Liang, J Cai
PURPOSE: To develop an image fusion method using multiple contrast MRI scans for MR-based treatment planning. METHODS: T1 weighted (T1-w), T2 weighted (T2-w) and diffusion weighted images (DWI) were acquired from liver cancer patient with breath-holding. Image fade correction and deformable image registration were performed using VelocityAI (Varian Medical Systems, CA). Registered images were normalized to mean voxel intensity for each image dataset. Contrast to noise ratio (CNR) between tumor and liver was quantified...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28030474/therapeutic-benefits-of-the-methyl-donor-s-adenosylmethionine-sam-on-nerve-injury-induced-mechanical-hypersensitivity-and-cognitive-impairment-in-mice
#7
Stéphanie Grégoire, Magali Millecamps, Lina Naso, Sonia Do Carmo, A Claudio Cuello, Moshe Szyf, Laura S Stone
Despite considerable advances in understanding mechanisms involved in chronic pain, effective treatment remains elusive. Co-morbid conditions including anxiety, depression and cognitive impairment further impact quality of life. Chronic pain is associated with reversible changes in brain anatomy and function and with long-term changes in gene expression. Epigenetic mechanisms, including DNA methylation, contribute to wide-spread and long-lasting reprogramming of gene expression. We previously reported decreases in global DNA methylation in the mouse frontal cortex six months following induction of neuropathic pain using the Spared Nerve Injury (SNI) model...
December 22, 2016: Pain
https://www.readbyqxmd.com/read/28027615/living-donor-liver-transplantation-using-an-extended-right-lateral-sector-graft
#8
N Yoshida, T Takamoto, T Hashimoto, Y Maruyama, H Abe, K Shimada, T Takayama, M Makuuchi
There are three grafts (left, right and right lateral sector [RLS]) available for adult living donor liver transplantation (LDLT), and we herein report LDLT performed using an extended RLS graft. An extended RLS graft is an RLS plus right paramedian dorsal sector (RPMS-dorsal) graft. In this case, the proportion of the RLS graft of the predicted graft volume (GV) to the recipient's standard liver volume (SLV) was only 17.7%, preoperatively. A three-dimensional (3D) analysis, showed that the RPMS-dorsal branches of the portal veins branched from the posterior trunk not the anterior trunk...
December 27, 2016: Liver Transplantation
https://www.readbyqxmd.com/read/28017834/indocyanine-green-fluorescence-imaging-in-hepatobiliary-surgery
#9
REVIEW
Ali Majlesara, Mohammad Golriz, Mohammadreza Hafezi, Arash Saffari, Esther Wild, Lena Maier-Hein, Beat P Müller-Stich, Arianeb Mehrabi
Indocyanine green (ICG) is a fluorescent dye that has been widely used for fluorescence imaging during hepatobiliary surgery. ICG is injected intravenously, selectively taken up by the liver, and then secreted into the bile. The catabolism and fluorescence properties of ICG permit a wide range of visualization methods in hepatobiliary surgery. We have characterized the applications of ICG during hepatobiliary surgery into: 1) liver mapping, 2) cholangiography, 3) tumor visualization, and 4) partial liver graft evaluation...
December 22, 2016: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28012335/is-the-absence-of-right-hepatic-vein-opening-into-inferior-vena-cava-a-contraindication-for-right-lobe-liver-donation-in-living-donor-liver-transplantation-common-hepatic-venous-trunk-a-rare-hepatic-vein-anomaly-a-case-report-and-review
#10
Samrat Ray, T Anila, Sandeep Kumar Jha, Saumitra Rawat, Kishan Singh Rawat, Suresh Kumar Singhvi
INTRODUCTION: In majority of the living liver donors, the left and the middle hepatic veins form a common trunk and the right hepatic vein drains by a separate trunk into the IVC forming two ostial openings. PRESENTATION OF CASE: This report presents a rare challenge to the operating surgeon in which the three major hepatic veins form a common trunk and drain into the IVC through a single ostial opening. It was detected preoperatively by the routine donor imaging studies...
November 18, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27993319/lymphatic-anatomy
#11
REVIEW
Michael C Hsu, Maxim Itkin
Recent development of new lymphatic imaging and intervention techniques, such as intranodal lymphangiogram, dynamic contrast enhanced magnetic resonance lymphangiography and lymphatic embolization, have resulted in the resurgence of interest in the lymphatic anatomy. The lymphatic system is a continuous maze of interlacing vessels and lymph nodes and is extremely complex and variable. This presents a significant challenge for interpretation of imaging and performance of interventions on this system. There is an embryological reason for this complexity and variability; the lymphatic system sprouts off of primordia from several locations in the body, which later fuse together at different stages of development of the embryo...
December 2016: Techniques in Vascular and Interventional Radiology
https://www.readbyqxmd.com/read/27981312/unfused-liver-segments-a-case-report-of-an-unknown-phenotype-of-the-conradi-h%C3%A3-nermann-happle-syndrome
#12
Fabian Bartsch, Maximilian Ackermann, Hauke Lang, Stefan Heinrich
BACKGROUND: Since its description in 1957, Couinaud`s classification of the segmental organization of the liver has remained valid. However, recent investigations by 3-dimensional computed tomography suggest a significant variability of the vascular anatomy and segment volume. Here, we report a surprise finding during the laparoscopic cholecystectomy of a patient with Conradi-Hünermann-Happle syndrome, in whom the liver segments were not fused. CASE REPORT: Laparoscopic cholecystectomy was performed because of recurrent biliary pancreatitis in a 47 year-old male patient, who had been diagnosed with Conradi-Hünermann-Happle syndrome...
December 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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 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
#19
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
#20
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
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