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Anatomical segmentation

Oholi Tovia-Brodie, Bernard Belhassen, Aharon Glick, Haim Shmilovich, Galit Aviram, Raphael Rosso, Yoav Michowitz
INTRODUCTION: A new imaging software (CARTO® Segmentation Module, Biosense Webster) allows pre-procedural 3-D reconstruction of all heart chambers based on cardiac CT. We describe our initial experience with the new module during ablation of ventricular arrhythmias. METHODS AND RESULTS: Eighteen consecutive patients with idiopathic ventricular arrhythmias or ischemic ventricular tachycardia (VT) were studied. In the latter group, a combined endocardial and epicardial ablation was performed...
October 20, 2016: Journal of Cardiovascular Electrophysiology
M C Burg, P Lunkenheimer, P Niederer, C Brune, K Redmann, M Smerup, U Spiegel, F Becker, D Maintz, W Heindel, R H Anderson
Purpose: There are ongoing arguments as to how cardiomyocytes are aggregated together within the ventricular walls. We used pneumatic distension through the coronary arteries to exaggerate the gaps between the aggregated cardiomyocytes, analyzing the pattern revealed using computed tomography, and validating our findings by histology. Methods: We distended 10 porcine hearts, arresting 4 in diastole by infusion of cardioplegic solutions, and 4 in systole by injection of barium chloride. Mural architecture was revealed by computed tomography, measuring also the angulations of the long chains of cardiomyocytes...
November 2016: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
Roxane Maurer, Michel Rivoire, Valéria Basso, Pierre Meeus, Patrice Peyrat, Aurélien Dupré
BACKGROUND: The portal vascularization of segment IV (S4) of the liver has not been well described. Knowledge of the portal supply to S4 is of great interest for liver surgery and for interventional radiological procedures. This study aimed to analyse the distribution of portal vein branches supplying S4. METHODS: We retrospectively analysed data from patients operated on for liver tumours between 2007 and 2016. Patients with involvement of S4 branches or the left portal vein, previous liver surgery or poor quality imaging were excluded...
October 18, 2016: Surgical and Radiologic Anatomy: SRA
Peter A Lioufas, Michelle R Quayle, James C Leong, Paul G McMenamin
: To explore the potential viability and limitations of 3D printed models of children with cleft palate deformity. BACKGROUND: The advantages of 3D printed replicas of normal anatomical specimens have previously been described. The creation of 3D prints displaying patient-specific anatomical pathology for surgical planning and interventions is an emerging field. Here we explored the possibility of taking rare pediatric radiographic data sets to create 3D prints for surgical education...
September 2016: Plastic and Reconstructive Surgery. Global Open
Luca Portigliotti, David Fuks, Oleg Slivca, Christophe Bourdeaux, Takeo Nomi, Mostefa Bennamoun, Sergio Gentilli, Brice Gayet
INTRODUCTION: The benefit of by laparoscopic resection for lesions located in postero-superior segments is unclear. The present series aimed at comparing intraoperative and post-operative results in patients undergoing either laparoscopic RPS or laparoscopic RH for colorectal liver metastases located in the right postero-superior segments. METHODS: From 2000 to 2015, patients who underwent laparoscopic resection of segment 6 and/or 7 (RPS group) were compared with those with right hepatectomy (RH group) in terms of tumour characteristics, surgical treatment, and short-term outcomes...
October 17, 2016: Surgical Endoscopy
Lin Li, Mary Cazzell, Olajide Babawale, Hanli Liu
Atlas-guided diffuse optical tomography (atlas-DOT) is a computational means to image changes in cortical hemodynamic signals during human brain activities. Graph theory analysis (GTA) is a network analysis tool commonly used in functional neuroimaging to study brain networks. Atlas-DOT has not been analyzed with GTA to derive large-scale brain connectivity/networks based on near-infrared spectroscopy (NIRS) measurements. We introduced an automated voxel classification (AVC) method that facilitated the use of GTA with atlas-DOT images by grouping unequal-sized finite element voxels into anatomically meaningful regions of interest within the human brain...
October 2016: Neurophotonics
Leo Fradet, Xiaoyu Wang, Lawrence G Lenke, Carl-Eric Aubin
BACKGROUND: Proximal junctional failure is a severe proximal junctional complication following adult spinal instrumentation and involving acute proximal junctional kyphotic deformity, mechanical failure at the upper instrumented vertebra or just above, and/or proximal junctional osseoligamentous disruption. Clinical studies have identified potential risk factors, but knowledge on their biomechanics is still lacking for addressing the proximal junctional failure issues. The objective of this study was to develop comprehensive computational modeling and simulation techniques to investigate proximal junctional failure...
October 11, 2016: Clinical Biomechanics
Jake S Burrell, Simon Walker-Samuel, Jessica K R Boult, Lauren C J Baker, Yann Jamin, Jane Halliday, John C Waterton, Simon P Robinson
The aim of this study was to use the combined carbogen-ultrasmall superparamagnetic iron oxide (CUSPIO) magnetic resonance imaging (MRI) method, which uses spatial correlations in independent susceptibility imaging biomarkers, to investigate and compare the impact of tumor size and anatomical site on vascular structure and function in vivo. Mice bearing either subcutaneous or orthotopic PC3 LN3 prostate tumors were imaged at 7 T, using a multi-gradient echo sequence to quantify R2, before and during carbogen (95% O2/5% CO2) breathing, and subsequently following intravenous administration of USPIO particles...
October 2016: Topics in Magnetic Resonance Imaging: TMRI
Hidenao Kayawake, Toyofumi F Chen-Yoshikawa, Akihiro Aoyama, Hideki Motoyama, Kyoko Hijiya, Toshi Menju, Toshihiko Sato, Makoto Sonobe, Hiroshi Date
OBJECTIVES: Donor lobectomies in living-donor lobar lung transplantation sometimes require additional surgical procedures on the interlobar pulmonary artery. We retrospectively reviewed the surgical techniques and outcomes of living-donor lobectomy. METHODS: Between 2008 and 2015, 116 living-donor lobectomies were performed in 64 consecutive living-donor lobar lung transplantations (52 bilateral, 12 single). The surgical techniques and outcomes were reviewed retrospectively...
October 15, 2016: European Journal of Cardio-thoracic Surgery
Yibin Xie, Young-Jin Kim, Jianing Pang, Jung-Sun Kim, Qi Yang, Janet Wei, Christopher T Nguyen, Zixin Deng, Byoung Wook Choi, Zhaoyang Fan, C Noel Bairey Merz, Prediman K Shah, Daniel S Berman, Hyuk-Jae Chang, Debiao Li
OBJECTIVES: The aim of this work is the development of coronary atherosclerosis T1-weighted characterization with integrated anatomical reference (CATCH) technique and the validation by comparison with high-risk plaque features (HRPF) observed on intracoronary optical coherence tomography (OCT) and invasive coronary angiography. BACKGROUND: T1-weighted cardiac magnetic resonance with or without contrast media has been used for characterizing coronary atherosclerosis showing promising prognostic value...
October 6, 2016: JACC. Cardiovascular Imaging
Fuyou Liang, Xiaosheng Liu, Ryuhei Yamaguchi, Hao Liu
Recent studies raised increasing concern about the reliability of computer models in reproducing in vivo hemodynamics in cerebral aneurysms. Boundary condition problem is among the most frequently addressed issues since three-dimensional (3-D) modeling is usually restricted to local arterial segments. The present study focused on aneurysms on the anterior communicating artery (ACoA) which represent a large subgroup of detected cerebral aneurysms and, in particular, have a relatively high risk of rupture compared to aneurysms located in other regions...
October 6, 2016: Journal of Biomechanics
Marianne E Witte, Suzanne Holewijn, Ramon R van Eekeren, Jean-Paul de Vries, Clark J Zeebregts, Michel M P J Reijnen
PURPOSE: To report the midterm results of mechanochemical ablation (MOCA) for treating great saphenous vein (GSV) insufficiency. METHODS: In a 1-year period, 85 consecutive patients (median age 51.4 years; 71 women) undergoing MOCA with polidocanol in 104 limbs were enrolled in a prospective registry. The patients were evaluated at baseline and during follow-up (4 weeks and 1, 2, and 3 years) using duplex ultrasound, the CEAP (clinical, etiologic, anatomic and pathophysiologic) classification, the Venous Clinical Severity Score (VCSS), the RAND Short Form 36-Item Health Survey (RAND-SF36), and the Aberdeen Varicose Vein Questionnaire (AVVQ)...
October 14, 2016: Journal of Endovascular Therapy
Guillaume Zahnd, Kostas Kapellas, Martijn van Hattem, Anouk van Dijk, André Sérusclat, Philippe Moulin, Aad van der Lugt, Michael Skilton, Maciej Orkisz
The aim of this study was to introduce and evaluate a contour segmentation method to extract the interfaces of the intima-media complex in carotid B-mode ultrasound images. The method was applied to assess the temporal variation of intima-media thickness during the cardiac cycle. The main methodological contribution of the proposed approach is the introduction of an augmented dimension to process 2-D images in a 3-D space. The third dimension, which is added to the two spatial dimensions of the image, corresponds to the tentative local thickness of the intima-media complex...
October 12, 2016: Ultrasound in Medicine & Biology
Mickael Dinomais, Sebastien Celle, Guillaume T Duval, Frederic Roche, Samir Henni, Robert Bartha, Olivier Beauchet, Cedric Annweiler
The clinical utility of the Mini-Mental State Examination (MMSE) and its shorter version (SMMSE) is still debated. There is a need to better understand the neuroanatomical correlates of these cognitive tests. The objective of this cross-sectional study was to determine whether lower MMSE and SMMSE scores correlated with focal brain volume reduction in older adults. Participants from the GAIT study (n = 207; mean, 70.9±5.9 years; 57% female; mean MMSE 26.2±3.9; mean SMMSE 5.1±1.1) were evaluated using the MMSE and SMMSE and received a 1...
2016: PloS One
Bon-Jour Lin, Tzu-Tsao Chung, Meng-Chi Lin, Chin Lin, Dueng-Yuan Hueng, Yuan-Hao Chen, Chung-Ching Hsia, Da-Tong Ju, Hsin-I Ma, Ming-Ying Liu, Chi-Tun Tang
Cavernous segment internal carotid artery (CSICA) injury during endoscopic transsphenoidal surgery for pituitary tumor is rare but fatal. The aim of this study is to investigate anatomical relationship between pituitary macroadenoma and corresponding CSICA using quantitative means with a sense to improve safety of surgery.In this retrospective study, a total of 98 patients with nonfunctioning pituitary macroadenomas undergoing endoscopic transsphenoidal surgeries were enrolled from 2005 to 2014. Intercarotid distances between bilateral CSICAs were measured in the 4 coronal levels, namely optic strut, convexity of carotid prominence, median sella turcica, and dorsum sellae...
October 2016: Medicine (Baltimore)
Peter B Terry, Richard J Traystman
Oxygen delivery and carbon dioxide removal being critical to cell survival, mammals have developed collateral vascular and ventilation systems to ensure tissue viability. Collateral ventilation, defined as ventilation of alveoli via pathways that bypass normal airways, is present in humans and many other species. The presence of collateral ventilation can be beneficial in certain disease states, while its relative absence can predispose to other diseases. These well defined anatomical pathways contribute little to ventilation in normal humans, but modulate ventilation perfusion imbalance in a variety of diseases including obstructive diseases such as asthma and emphysema...
October 14, 2016: Annals of the American Thoracic Society
Le Xiao, Jian-Wei Li, Shu-Guo Zheng
BACKGROUND: The reported protocol was difficult to expose the hepatic veins for laparoscopic anatomical hepatectomy of segments VII and VIII. We introduce a new, convenient, applicable approach with the hepatic vein exposed from the head side. METHODS: This study included 10 patients who underwent laparoscopic liver resection for HCC in the segments VII and VIII between October, 2014 and November, 2015. Their perioperative course and operative techniques were retrospectively evaluated...
October 14, 2016: Journal of Surgical Oncology
Norikazu Kawai, Takeshi Kawaguchi, Motoaki Yasukawa, Takashi Tojo
Anatomical variations of the pulmonary artery increase the risks for vessel injury and critical mistakes during pulmonary artery resection. The mediastinal basal pulmonary artery is a rare branch abnormality and is the first branch of the pulmonary artery to flow into the basal segment. We report a patient who underwent video-assisted thoracic surgery (VATS) right lower lobectomy for lung cancer with a mediastinal basal pulmonary artery. The mediastinal basal pulmonary artery was detected preoperatively by computed tomography...
October 13, 2016: General Thoracic and Cardiovascular Surgery
C Belvedere, A Ensini, M d'Amato, P Barbadoro, A Leardini
PURPOSE: Physiological elongation and orientation of patellar tendon fibres are among the scopes of total knee arthroplasty, but little is known in the three dimensions. The study aims to assess in vitro these variations at the intact and replaced knee, with and without patellar resurfacing. It was hypothesised that fibre patterns differ before and after prosthesis implantation, and between specific prosthesis designs. It was also expected that patellar resurfacing would affect relevant results...
October 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Maarten van Eerd, Arno Lataster, Micha Sommer, Jacob Patijn, Maarten van Kleef
The cervical facet joints, also called the zygapophyseal joints, are a potential source of neck pain (cervical facet joint pain). The cervical facet joints are innervated by the cervical medial branches (CMBs) of the cervical segmental nerves. Cervical facet joint pain has been shown to respond to multisegmental radiofrequency denervation of the cervical medial branches. This procedure is performed under fluoroscopic guidance. Currently, three approaches are described and used. Those three techniques of radiofrequency treatment of the CMBs, classified on the base of the needle trajectory toward the anatomical planes, are as follows: the posterolateral technique, the posterior technique, and the lateral technique...
October 13, 2016: Pain Practice: the Official Journal of World Institute of Pain
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