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https://www.readbyqxmd.com/read/28440234/endoscopic-ultrasound-of-peritoneal-spaces
#1
Malay Sharma, Jayan Gopinath Madambath, Piyush Somani, Amit Pathak, Chittapuram Srinivasan Rameshbabu, Raghav Bansal, Kovil Ramasamy, Amol Patil
The peritoneal cavity is subdivided into supracolic and infracolic compartments by transverse colon and its mesocolon. The supracolic compartment contains the liver, spleen, stomach, and lesser omentum. The infracolic compartment contains the coils of small bowel surrounded by ascending, transverse, and descending colon and the paracolic gutters. The imaging of different compartments is possible by various methods such as ultrasound (US) and computerized tomography. The treating physicians should be familiar with the relevant radiological anatomy of different compartments and spaces as accurate localization of fluid collection/lymph node in peritoneal cavity greatly aids in selection of a treatment strategy...
March 2017: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/28436842/a-hybrid-image-registration-and-matching-framework-for-real-time-motion-tracking-in-mri-guided-radiotherapy
#2
Matteo Seregni, Chiara Paganelli, Paul Summers, Massimo Bellomi, Guido Baroni, Marco Riboldi
OBJECTIVE: MRI-guided radiotherapy (MRIgRT) is an emerging treatment technique where anatomical and pathological structures are imaged through integrated MR-radiotherapy units. This work aims (i) at assessing the accuracy of optical-flow based motion tracking in liver cine-MRI sequences and (ii) at testing a MRIgRT workflow combining similarity-based image matching with image registration. METHODS: After an initialization stage, a set of template images is collected and registered to the first frame of the cine-MRI sequence...
April 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28427741/management-of-biliary-anastomotic-strictures-after-liver-transplantation
#3
REVIEW
Aydin Seref Koksal, Ahmet Tarik Eminler, Erkan Parlak, Ahmet Gurakar
Biliary strictures constitute 40% to 60% of the biliary complications after liver transplantation. They are more common after living donor related liver transplantation (LDLT) than orthotopic liver transplantation (OLT). Balloon dilation followed by multiple plastic stent insertion leads to a mean resolution rate of 84% in the treatment of ASs after OLT. Endoscopic treatment of ASs after LDLT is more difficult because of the small size of the ASs, their multiple number and peripheral location. Balloon dilation followed by multiple plastic stent insertion had a mean resolution rate of 53%...
March 30, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/28398710/additional-values-of-high-resolution-gadoxetic-acid-enhanced-mr-cholangiography-for-evaluating-the-biliary-anatomy-of-living-liver-donors-comparison-with-t2-weighted-mr-cholangiography-and-conventional-gadoxetic-acid-enhanced-mr-cholangiography
#4
Hyo-Jin Kang, Jeong Min Lee, Jeong Hee Yoon, Ijin Joo, Won Chang, Kyung-Suk Suh, Kwang-Woong Lee, Nam-Joon Yi, Joon Koo Han
PURPOSE: To determine the incremental value of small field of view (sFOV) high-resolution (HR) gadoxetic acid-enhanced 3D T1 -weighted (W) magnetic resonance cholangiography (MRC) for evaluating the biliary anatomy of potential living donors by comparing it to T2 W-MRC. MATERIALS AND METHODS: In all, 73 living donor candidates underwent gadoxetic acid-enhanced MRI (3.0T) including three kinds of MRCs: 3D multislice T2 W-MRC, regular FOV (rFOV) (380 × 380mm, resolution 1...
April 11, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28396005/transradial-access-for-interventional-radiology-single-centre-procedural%C3%A2-and-clinical-outcome-analysis
#5
Avnesh S Thakor, Mohammed T Alshammari, David M Liu, John Chung, Stephen G F Ho, Gerald M Legiehn, Lindsay Machan, Aaron M Fischman, Rahul S Patel, Darren Klass
PURPOSE: The study sought to describe a single centre's technical approach to transradial intervention and report on clinical outcomes and safety. METHODS: A total of 749 transradial access (TRA) procedures were performed at a single hospital in 562 patients (174 women and 388 men). Procedures included 445 bland embolizations or chemoembolizations of the liver, 88 uterine artery embolizations, and 148 procedures for Selective Internal Radiation Therapy (Y90), which included mapping and administration...
April 7, 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/28384848/surgical-implications-of-portal-vein-variations-and-liver-segmentations-a-recent-update
#6
REVIEW
Showkathali Iqbal, Raiz Iqbal, Faiz Iqbal
The Couinaud's liver segmentation is based on the identification of portal vein bifurcation and origin of hepatic veins. It is widely used clinically, because it is better suited for surgery and is more accurate in localizing and monitoring various intra parenchymal lesions. According to standard anatomy, the portal vein bifurcates into right and left branches; the left vein drains segment II, III and IV and the right vein divides into two secondary branches - the anterior portal vein drains segments V and VIII, and the posterior drains segments VI and VII...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28365949/effect-and-influence-factor-analysis-of-intrahepatic-glisson-s-sheath-vascular-disconnection-approach-for-anatomical-hepatectomy-by-three-dimensional-laparoscope
#7
Dapeng Qiu, Hao Zhuang, Feng Han
PURPOSE: To investigate the effects and influence factor analysis of intrahepatic Glisson's sheath vascular disconnection approach for anatomical hepatectomy by three-dimensional (3D) laparoscope. METHODS: 82 patients with liver cancer were selected and divided into the control group with 45 cases and observation group with 37 cases according to different treatment methods. The control group was subjected to conventional laparotomy or resection under two-dimensional (2D) laparoscope while the observation group was subjected to anatomical hepatectomy by intrahepatic Glisson's sheath vascular disconnection approach under 3D laparoscope, and the therapeutic effects were compared...
January 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28365715/gall-bladder-agenesis-a-rare-embryonic-cause-of-recurrent-biliary-colic
#8
Aarthi Rajkumar, Albina Piya
BACKGROUND Gallbladder agenesis (GA) is an extremely rare anatomic anomaly with a reported incidence of less than 0.5%. It is usually asymptomatic, but can present with features of biliary colic and cholecystitis. We present here a case of GA in a patient with recurrent biliary colic.  CASE REPORT A 24-year-old African American woman presented with recurrent episodes of right upper-quadrant abdominal pain. During her first episode, she was found to have elevated transaminases and clinical features of cholecystitis, but ultrasound did not visualize a gallbladder and she was discharged with a diagnosis of biliary colic...
April 2, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28355772/-progress-in-application-of-three-dimensional-imaging-technique-in-complex-hepatobiliary-surgery
#9
G W Ji, F P Zhu, X C Li
Hepatobiliary surgery is considered to be technically challenging because of complex intrahepatic and perihilar anatomical structures and variations.Nowadays, three-dimensional imaging technique plays an important role in the time of precise liver surgery.Three-dimensional images depict the spatial location of tumor, and the course, confluence pattern and variation of portal vein, hepatic artery, biliary system and hepatic vein distinctly while showing involved hepatic segments and the relationship with adjacent vessels from omnidirectional view, measuring the length of margin and future remnant liver...
April 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28334490/mr-cholangiography-in-potential-liver-donors-quantitative-and-qualitative-improvement-with-administration-of-an-oral-effervescent-agent
#10
Heon-Ju Kwon, Kyoung Won Kim, Sang Hyun Choi, Jin-Hee Jung, So Yeon Kim, Se-Young Kim, Jeongjin Lee, Dong-Hwan Jung, Tae-Yong Ha, Gi-Won Song, Sung-Gyu Lee
PURPOSE: To determine whether an oral effervescent agent improves magnetic resonance cholangiography (MRC) images, both qualitatively and quantitatively, in potential live liver donors. MATERIALS AND METHODS: This retrospective study was approved by the Institutional Review Board, and informed consent was waived. Seventy potential liver donors underwent 2D MRC before and after administration of an oral effervescent agent. One radiologist measured relative contrast ratio (rC) and relative signal intensity (rS) for right and left intrahepatic ducts (RHD and LHD), and common hepatic duct (CHD)...
March 23, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28331142/usefulness-of-color-coding-resected-samples-from-a-pancreaticoduodenectomy-with-tissue-marking-dyes-for-a-detailed-examination-of-surgical-margin-surrounding-the-uncinate-process-of-the-pancreas
#11
Satoshi Mizutani, Hideyuki Suzuki, Takayuki Aimoto, Seiji Yamagishi, Keisuke Mishima, Masanori Watanabe, Yasuhiko Kitayama, Norio Motoda, Saiko Isshiki, Eiji Uchida
BACKGROUND: Characteristics of a cancer-positive margin around a resected uncinate process of the pancreas (MUP) due to a pancreticoduodenectomy are difficult to understand by standardized evaluation because of its complex anatomy. The purposes of this study were to subclassify the MUP with tissue marking dyes of different colors and to identify the characteristics of sites that showed positivity for cancer cells in patients with pancreatic head carcinoma who underwent circumferential superior mesenteric arterial nerve plexus-preserving pancreaticoduodenectomy...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/28323442/an-investigation-of-human-body-model-morphing-for-the-assessment-of-abdomen-responses-to-impact-against-a-population-of-test-subjects
#12
Philippe Beillas, Fabien Berthet
OBJECTIVE: Human Body Models have the potential to better describe the human anatomy and variability than dummies. However, datasets available to verify the human response to impact are typically limited in numbers, and they are not size or gender specific. The objective of the study was to investigate the use of model morphing methodologies within that context. METHODS: In the current study, a simple human model scaling methodology was developed to morph two detailed human models (Global Human Body Model Consortium models 50(th) male, M50 and 5(th) female F05) to the dimensions of Post Mortem Human Surrogates (PMHS) used in published literature...
March 21, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28322287/anatomy-of-the-retrohepatic-tunnel-in-a-chinese-population-and-its-clinical-application-in-liver-surgery
#13
Wang Zheng, Ding Zi-Hai, Zhou Jie, Zhong Shi-Zhen, Lin Jian-Hua, Lin Yi-Xiong
Liver hanging maneuver (LHM) is an important technique in liver surgery. However, applied anatomy of the retrohepatic tunnel for the surgical approach in Chinese population needs further study. In this study, to explore the basic anatomy of retrohepatic tunnel and its clinical application in a Chinese population, a total of 32 formalin-fixed cadavers were dissected, related parameters were measured, and their clinical applications were discussed. The length of the retrohepatic tunnel was (60.6 ± 9.9) mm...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28320741/hypoxia-enhances-antibody-dependent-dengue-virus-infection
#14
Esther Shuyi Gan, Wei Fun Cheong, Kuan Rong Chan, Eugenia Ziying Ong, Xiaoran Chai, Hwee Cheng Tan, Sujoy Ghosh, Markus R Wenk, Eng Eong Ooi
Dengue virus (DENV) has been found to replicate in lymphoid organs such as the lymph nodes, spleen, and liver in post-mortem analysis. These organs are known to have low oxygen levels (~0.5-4.5% O2) due to the vascular anatomy. However, how physiologically low levels of oxygen affect DENV infection via hypoxia-induced changes in the immune response remains unknown. Here, we show that monocytes adapted to 3% O2 show greater susceptibility to antibody-dependent enhancement of DENV infection. Low oxygen level induces HIF1α-dependent upregulation of fragment crystallizable gamma receptor IIA (FcγRIIA) as well as HIF1α-independent alterations in membrane ether lipid concentrations...
March 20, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28317122/an-anthropomorphic-abdominal-phantom-for-deformable-image-registration-accuracy-validation-in-adaptive-radiation-therapy
#15
Yuliang Liao, Linjing Wang, Xiangdong Xu, Haibin Chen, Jiawei Chen, Guoqian Zhang, Huaiyu Lei, Ruihao Wang, Shuxu Zhang, Xuejun Gu, Xin Zhen, Linghong Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropomorphic abdominal phantom for geometric accuracy and dose summation accuracy evaluations of deformable image registration (DIR) algorithms for adaptive radiation therapy (ART). METHOD: Organ molds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, were 3D printed using contours from an ovarian cancer patient. The organ molds were molded with deformable gels made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28295949/portosystemic-shunt-as-a-bridge-to-liver-transplantation-in-infants-a-comparison-of-two-techniques
#16
Dor Yoeli, N Thao N Galván, Daniel J Ashton, Kayla R Kumm, Michael L Kueht, Ellen D Witte, Tamir A Miloh, Ronald T Cotton, Abbas Rana, Christine A O'Mahony, John A Goss
Portosystemic shunts can serve as a bridge to liver transplantation in patients with end-stage liver disease by providing portal decompression to treat life-threatening variceal bleeding and prevent recurrent episodes until an organ becomes available. The conventional TIPS procedure, however, is technically challenging to perform in infants due to the small size of their intrahepatic vasculature. We report two cases of emergent creation of portosystemic shunts as a bridge to liver transplantation in infants with life-threatening variceal bleeding using a conventional TIPS technique in the first case and a percutaneous DIPS technique in the other...
March 13, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28291931/investigation-of-dosimetric-variations-of-liver-radiotherapy-using-deformable-registration-of-planning-ct-and-cone-beam-ct
#17
Pu Huang, Gang Yu, Jinhu Chen, Changsheng Ma, Shaohua Qin, Yong Yin, Yueqiang Liang, Hongsheng Li, Dengwang Li
Many patients with technically unresectable or medically inoperable hepatocellular carcinoma (HCC) had hepatic anatomy variations as a result of interfraction deformation during fractionated radiotherapy. We conducted this retrospective study to investigate interfractional normal liver dosimetric consequences via reconstructing weekly dose in HCC patients. Twenty-three patients with HCC received conventional fractionated three-dimensional conformal radiation therapy (3DCRT) were enrolled in this retrospective investigation...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291918/organ-motion-in-pediatric-high-risk-neuroblastoma-patients-using-four-dimensional-computed-tomography
#18
Sneha Kannan, Boon-Keng Kevin Teo, Timothy Solberg, Christine Hill-Kayser
PURPOSE/OBJECTIVE(S): High-risk neuroblastoma (HR-NBL) requires multimodality treatment, including external beam radiation of the primary tumor site following resection. Radiotherapy planning must take into account motion of the target and adjacent normal anatomy, both of which are poorly understood in the pediatric population, and which may differ significantly from those in adults. METHODS/MATERIALS: We examined 4DCT scans of 15 consecutive pediatric patients treated for HR-NBL, most with tumors in the abdominal cavity...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28286672/is-ultrasonography-useful-for-population-studies-on-schistosomiasis-mansoni-an-evaluation-based-on-a-survey-on-a-population-from-kome-island-tanzania
#19
Mats Sl Asztely, Bo Eriksson, Reverianus M Gabone, Lars-Åke Nilsson
BACKGROUND: Observation of characteristic alterations at liver ultrasonography in clinical schistosomiasis mansoni cases has initiated utilization of this examination method in population surveys in areas where this disease is endemic. PURPOSE: To present results of liver ultrasonography and their relation to epidemiological data of a population in an area endemic for S. mansoni, to estimate the precision of classification of periportal anatomy changes known as periportal fibrosis (PPF), and to evaluate the relevance of ultrasonography in epidemiological studies on S...
December 2016: Acta Radiologica Open
https://www.readbyqxmd.com/read/28285339/acoustic-window-planning-for-ultrasound-acquisition
#20
Rüdiger Göbl, Salvatore Virga, Julia Rackerseder, Benjamin Frisch, Nassir Navab, Christoph Hennersperger
Autonomous robotic ultrasound has recently gained considerable interest, especially for collaborative applications. Existing methods for acquisition trajectory planning are solely based on geometrical considerations, such as the pose of the transducer with respect to the patient surface. PURPOSE: This work aims at establishing acoustic window planning to enable autonomous ultrasound acquisitions of anatomies with restricted acoustic windows, such as the liver or the heart. METHODS: We propose a fully automatic approach for the planning of acquisition trajectories, which only requires information about the target region as well as existing tomographic imaging data, such as X-ray computed tomography...
March 11, 2017: International Journal of Computer Assisted Radiology and Surgery
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