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liver 3D reconstruction

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https://www.readbyqxmd.com/read/27913340/efficient-3d-reconstruction-in-ultrasound-elastography-via-a-sparse-iteration-based-on-markov-random-fields
#1
Atul Ingle, Tomy Varghese, William Sethares
Percutaneous needle-based liver ablation procedures are becoming increasingly common for treatment of small isolated tumors in hepatocellular carcinoma patients who are not candidates for surgery. Rapid three dimensional visualization of liver ablations has potential clinical value because it can enable interventional radiologists to plan and execute needle-based ablation procedures with real time feedback. Ensuring the right volume of tissue is ablated is desirable to avoid recurrence of tumors from residual untreated cancerous cells...
November 29, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27913222/human-liver-regeneration-in-advanced-cirrhosis-is-organized-by-the-portal-tree
#2
Katalin Dezső, András Rókusz, Edina Bugyik, Armanda Szücs, András Szuák, Bence Dorogi, Mátyás Kiss, Ágnes Nemeskéri, Péter Nagy, Sándor Paku
BACKGROUND&AIMS: In advanced cirrhosis new hepatocytic nodules are generated by budding of ductules in areas of parenchymal extinction. However, the vascular alterations in the areas of parenchymal extinction, the blood supply and the structure of the new hepatocytic nodules have not been analyzed in detail. METHODS: Explanted human cirrhotic livers of three different etiologies and two experimental models of cirrhosis in rats were examined thoroughly. 3D reconstruction of the immunohistochemically stained serial sections and casting of human and experimental cirrhotic livers have been used to reveal the structural organization of the regenerative buds...
November 29, 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27908164/comparison-of-low-contrast-detectability-between-two-ct-reconstruction-algorithms-using-voxel-based-3d-printed-textured-phantoms
#3
Justin Solomon, Alexandre Ba, François Bochud, Ehsan Samei
PURPOSE: To use novel voxel-based 3D printed textured phantoms in order to compare low-contrast detectability between two reconstruction algorithms, FBP (filtered-backprojection) and SAFIRE (sinogram affirmed iterative reconstruction) and determine what impact background texture (i.e., anatomical noise) has on estimating the dose reduction potential of SAFIRE. METHODS: Liver volumes were segmented from 23 abdominal CT cases. The volumes were characterized in terms of texture features from gray-level co-occurrence and run-length matrices...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27889104/three-dimensional-reconstruction-of-the-embryonic-pancreas-in-the-grass-snake-natrix-natrix-l-lepidosauria-serpentes-based-on-histological-studies
#4
Magdalena Kowalska, Mateusz Hermyt, Weronika Rupik
The aim of this study was to evaluate two research hypotheses: H0-the embryonic pancreas in grass snakes develops in the same manner as in all previously investigated amniotes (from three buds) and its topographical localization within the adult body has no relation to its development; H1-the pancreas develops in a different manner and is related to the different topography of internal organs in snakes. For the evaluation of these hypotheses we used histological methods and three-dimensional (3D) reconstructions of the position of the pancreatic buds and surrounding organs at particular developmental stages and of the final position and shape of the pancreatic gland...
November 11, 2016: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/27791997/stem-cells-and-vascular-regenerative-medicine
#5
J-F Stoltz, D Bensoussan, N De Isla, L Zhang, Z Han, J Magdalou, C Huselstein, J S Ye, N Li, V Decot, L Reppel
Most human tissues do not regenerate spontaneously, which is why "cell therapy" are promising alternative treatments. The Principe is simple: patients' or donors' cells are collected and introduced into the injured tissues or organs directly or in a porous 3D material, with or without modification of their properties. This concept of regenerative medicine is an emerging field which can be defined as "the way to improve health and quality of life by restoring, maintaining, or enhancing tissue and organ functions"...
October 27, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27733321/human-hepatocytes-loaded-in-3d-bioprinting-generate-mini-liver
#6
Cheng Zhong, Hai-Yang Xie, Lin Zhou, Xiao Xu, Shu-Sen Zheng
BACKGROUND: Because of an increasing discrepancy between the number of potential liver graft recipients and the number of organs available, scientists are trying to create artificial liver to mimic normal liver function and therefore, to support the patient's liver when in dysfunction. 3D printing technique meets this purpose. The present study was to test the feasibility of 3D hydrogel scaffolds for liver engineering. METHODS: We fabricated 3D hydrogel scaffolds with a bioprinter...
October 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/27716273/a-clinical-combined-gadobutrol-bolus-and-slow-infusion-protocol-enabling-angiography-inversion-recovery-whole-heart-and-late-gadolinium-enhancement-imaging-in-a-single-study
#7
Animesh Tandon, Lorraine James, Markus Henningsson, René M Botnar, Amanda Potersnak, Gerald F Greil, Tarique Hussain
BACKGROUND: The use of gadolinium contrast agents in cardiovascular magnetic resonance is well-established and serves to improve both vascular imaging as well as enable late gadolinium enhancement (LGE) imaging for tissue characterization. Currently, gadofosveset trisodium, an intravascular contrast agent, combined with a three-dimensional inversion recovery balanced steady state free precession (3D IR bSSFP) sequence, is commonly used in pediatric cardiac imaging and yields excellent vascular imaging, but cannot be used for late gadolinium enhancement...
October 5, 2016: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/27616447/efficient-non-arterialized-mouse-liver-transplantation-using-3d-printed-instruments
#8
Graziano Oldani, Stéphanie Lacotte, Lorenzo A Orci, Vaihere Delaune, Florence Slits, Quentin Gex, Philippe Morel, Laura Rubbia-Brandt, Christian Toso
BACKGROUND: Due to the wide availability of genetically modified animals, mouse orthotopic liver transplantation is often preferred over rat liver transplantation. We present a simplified mouse liver transplantation technique, and compare transplantation outcomes with versus without hepatic artery anastomosis. METHODS: Instruments for liver implantation were designed and 3D-printed. The suprahepatic vena cava anastomosis was performed with 10-0 running suture. The vena porta and infrahepatic vena cava were joined on extraluminal cuffs, using the 3D-printed device for spatial alignment and stabilisation...
September 12, 2016: Liver Transplantation
https://www.readbyqxmd.com/read/27595838/coronal-2d-mr-cholangiography-overestimates-the-length-of-the-right-hepatic-duct-in-liver-transplantation-donors
#9
Bohyun Kim, Kyoung Won Kim, So Yeon Kim, So Hyun Park, Jeongjin Lee, Gi Won Song, Dong-Hwan Jung, Tae-Yong Ha, Sung Gyu Lee
PURPOSE: To compare the length of the right hepatic duct (RHD) measured on rotatory coronal 2D MR cholangiography (MRC), rotatory axial 2D MRC, and reconstructed 3D MRC. MATERIALS AND METHODS: Sixty-seven donors underwent coronal and axial 2D projection MRC and 3D MRC. RHD length was measured and categorized as ultrashort (≤1 mm), short (>1-14 mm), and long (>14 mm). The measured length, frequency of overestimation, and the degree of underestimation between two 2D MRC sets were compared to 3D MRC...
September 5, 2016: European Radiology
https://www.readbyqxmd.com/read/27587215/-application-of-three-dimensional-visualization-technology-in-surgical-treatment-for-patients-with-hepatic-alveolar-echinococcosis
#10
Y B He, L Bai, T Li, X W Ji, Aji Tuerganaili, Y Jiang, J M Zhao, Y M Shao, W Y Liu, H Wen
OBJECTIVE: To determine the clinical value of three-dimensional(3D) visualization technology in pre-operative assessment and surgical planning for patients with hepatic alveolar echinococcosis. METHODS: Eighty-five hepatic alveolar echinococcosis patients received surgical treatment in the First Affiliated Hospital of Xinjiang Medical University between May 2011 and May 2015.3D reconstruction and virtual surgeries were performed on diseased livers using a 3D visualization reconstruction system for liver, which based on the data set of 64-slice CT from those patients and indicated the feasibility and safety of liver resection...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27587214/-application-of-three-dimensional-visualization-technique-in-pediatric-living-donor-liver-transplantation
#11
Y Luo, M Zhang, T Zhou, J J Zhang, Q Xia
OBJECTIVE: To investigate the value of three-dimensional(3D) visualization technology for donor evaluation in pediatric living donor liver transplantation(LDLT). METHODS: The clinical data of 348 familial donors who underwent LDLT from January 2013 to December 2015 in Renji Hospital, Shanghai Jiaotong University School of Medicine were reviewed retrospectively.3D visualize-vascular type and liver grafts volume were analyzed and compared to the actual volume and anatomy...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27587213/-significance-of-three-dimensional-reconstruction-as-a-method-of-preoperative-planning-of-laparoscopic-radiofrequency-ablation
#12
W W Zhang, H G Wang, X J Shi, M Y Chen, S C Lu
OBJECTIVE: To discuss the significance of three-dimensional reconstruction as a method of preoperative planning of laparoscopic radiofrequency ablation(LRFA). METHODS: Thirty-two cases of LRFA admitted from January 2014 to December 2015 in Department of Hepatobiliary Surgery, Chinese People's Liberation Army General Hospital were analyzed(3D-LRFA group). Three-dimensional(3D) reconstruction were taken as a method of preoperative planning in 3D-LRFA group.Other 64 LRFA cases were paired over the same period without three-dimensional reconstruction before the operation (LRFA group)...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27587211/-the-construction-of-three-dimensional-visualization-platform-and-its-application-in-diagnosis-and-treatment-for-hilar-cholangiocarcinoma
#13
N Zeng, C H Fang, Y F Fan, J Yang, N Xiang, W Zhu, J Liu, W Cai, Z K Mo
OBJECTIVE: To explore the construction and clinical efficacy of three-dimensional(3D) visualization platform about diagnosis and treatment of hilar cholangiocarcinoma. METHODS: From January 2009 to December 2015, a total of 32 patients with hilarcholangiocarcinoma treated in Zhujiang Hospital of Southern Medical University were analyzed.There were 20 male and 12 female patients aged from 40 to 85 years. Bismuth-Corlette 3D visualization type: 2 cases with type Ⅰ, 5 cases with type Ⅱ, 10 cases with type Ⅲa, 11 cases with type Ⅲb, 4 cases with type Ⅳ...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27587209/-safety-assessment-of-hepatectomy-for-huge-hepatocellular-carcinoma-by-three-dimensional-reconstruction-technique
#14
L Chen, H P Luo, S L Dong, X P Chen
OBJECTIVE: To explore the effectiveness of three-dimentional(3D)reconstruction technique in safety assessment of hepatectomy for large hepatocellular carcinoma(HCC). METHODS: The clinical records of 28 patients who underwent resection of HCC greater than 10 cm in diameter from January 2013 to December 2015 at Department of Hepatic Surgery, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology were studied retrospectively. All patients underwent enhanced computer tomography (CT), then 3D images of liver and tumor were reconstructed by uploading the CT imaging data to IQQA-Liver system...
September 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27566028/usefulness-of-three-dimensional-3d-simulation-software-in-hepatectomy-for-pediatric-hepatoblastoma
#15
Gang Zhang, Xian-Jun Zhou, Cheng-Zhan Zhu, Qian Dong, Lin Su
BACKGROUND: Hepatoblastoma (HB) is the most common malignant liver tumor in childhood. Complete HB surgical resection which is technically demanding is the cornerstone of effective therapy with a good prognosis. The aim of our study is to evaluate the usefulness of 3D simulation software in assisting hepatectomy in pediatric patients with HB. METHODS: 21 children with HB who underwent hepatectomy were enrolled in this study. All patients underwent computer tomography (CT) imaging preoperatively...
September 2016: Surgical Oncology
https://www.readbyqxmd.com/read/27538822/polyhedral-3d-structure-of-human-plasma-very-low-density-lipoproteins-by-individual-particle-cryo-electron-tomography1
#16
Yadong Yu, Yu-Lin Kuang, Dongsheng Lei, Xiaobo Zhai, Meng Zhang, Ronald M Krauss, Gang Ren
Human VLDLs assembled in the liver and secreted into the circulation supply energy to peripheral tissues. VLDL lipolysis yields atherogenic LDLs and VLDL remnants that strongly correlate with CVD. Although the composition of VLDL particles has been well-characterized, their 3D structure is elusive because of their variations in size, heterogeneity in composition, structural flexibility, and mobility in solution. Here, we employed cryo-electron microscopy and individual-particle electron tomography to study the 3D structure of individual VLDL particles (without averaging) at both below and above their lipid phase transition temperatures...
October 2016: Journal of Lipid Research
https://www.readbyqxmd.com/read/27522708/-abdominal-radiology-in-oncology-the-new-trends-in-computed-tomography-and-magnetic-resonance-imaging
#17
REVIEW
A B Lukiyanchenko, V E Sinitsin, V O Panov
Paper gives a review of recent technical innovations in computed tomography (CT) and magnetic resonance imaging (MRI) that could be applied in abdominal oncology. Perfusion and dualenergy CT gives new opportunities for tissue characterization. Interactive reconstruction algorythms decrease radiation exposure to patients. Abdominal MRI has some important advantages over CT in detection and staging of abdominal malignancies. Nowadays standard MR protocols include DWI and dynamic 3D sequences with extracellular or liver-specific contrast media...
March 2016: Vestnik Rentgenologii i Radiologii
https://www.readbyqxmd.com/read/27501904/performance-of-adaptive-iterative-dose-reduction-3d-integrated-with-automatic-tube-current-modulation-in-radiation-dose-and-image-noise-reduction-compared-with-filtered-back-projection-for-80-kvp-abdominal-ct-anthropomorphic-phantom-and-patient-study
#18
Chien-Ming Chen, Yang-Yu Lin, Ming-Yi Hsu, Chien-Fu Hung, Ying-Lan Liao, Hui-Yu Tsai
OBJECTIVES: Evaluate the performance of Adaptive Iterative Dose Reduction 3D (AIDR 3D) and compare with filtered-back projection (FBP) regarding radiation dosage and image quality for an 80-kVp abdominal CT. MATERIALS AND METHODS: An abdominal phantom underwent four CT acquisitions and reconstruction algorithms (FBP; AIDR 3D mild, standard and strong). Sixty-three patients underwent unenhanced liver CT with FBP and standard level AIDR 3D. Further post-acquisition reconstruction with strong level AIDR 3D was made...
September 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27490316/surface-reconstruction-for-planning-and-navigation-of-liver-resections
#19
Rafael Palomar, Faouzi A Cheikh, Bjørn Edwin, Azeddine Beghdadhi, Ole J Elle
Computer-assisted systems for planning and navigation of liver resection procedures rely on the use of patient-specific 3D geometric models obtained from computed tomography. In this work, we propose the application of Poisson surface reconstruction (PSR) to obtain 3D models of the liver surface with applications to planning and navigation of liver surgery. In order to apply PSR, the introduction of an efficient transformation of the segmentation data, based on computation of gradient fields, is proposed. One of the advantages of PSR is that it requires only one control parameter, allowing the process to be fully automatic once the optimal value is estimated...
October 2016: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/27459980/robotic-lymphadenectomy-during-pancreatoduodenectomy-with-first-superior-mesenteric-artery-dissection
#20
R Memeo, V De Blasi, O Perotto, D Mutter, J Marescaux, P Pessaux
BACKGROUND: An expert consensus meeting had defined the standard lymphadenectomy during pancreatoduodenectomy for an adenocarcinoma of the head of the pancreas. There is a controversy regarding the possibility to perform this optimal lymphadenectomy by minimally invasive approach. PATIENTS: The patient was a 68-year-old man with the diagnosis of an adenocarcinoma of the head of the pancreas. The 3D reconstructions evidenced the existence of a right hepatic artery...
July 26, 2016: Annals of Surgical Oncology
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