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https://www.readbyqxmd.com/read/28723230/retrograde-endourological-management-of-upper-urinary-tract-abnormalities-in-patients-with-ileal-conduit-urinary-diversion-a-dual-center-experience
#1
Louise Olson, Hywel Satherley, Paul Cleaveland, Bachar Zelhof, Max Mokete, Donald Neilson, Shalom Srirangam
INTRODUCTION: Patients with ileal conduit urinary diversions are at an increased risk of long-term upper urinary tract (UUT) complications, including anastomotic strictures, infections, and urolithiasis. The reconstructed urinary system poses challenges for endoscopic manipulation. We present and describe our dual-center experience in performing retrograde ureteroscopy to treat or diagnose UUT abnormalities in patients with ileal conduit incontinent diversion. PATIENT AND METHODS: We performed a retrospective analysis of medical records for all patients with previous urinary diversion who underwent retrograde ureteroscopic procedures via the ileal loop in our institutions over a 9 year period (between June 2007 and August 2016)...
July 19, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28717867/totally-laparoscopic-living-donor-left-hepatectomy-for-liver-transplantation-in-a-child
#2
Helayel Almodhaiberi, Seok-Hwan Kim, Ki-Hun Kim
BACKGROUND: Minimally invasive surgery has been validated to be a new standard in living donor hepatectomy for adult-to-pediatric transplantation with less morbidity [1]. Laparoscopic donor hepatectomy can reduce the major concerns about pain and morbidity associated with open surgery and a slow return to daily activities of donors [2]. Herein, we present one case of totally laparoscopic living donor left hepatectomy including the middle hepatic vein (MHV). DONOR AND METHOD: A 37-year-old mother volunteered to donate to her 3-year-old son with biliary atresia (PELD score 7)...
July 17, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28717599/improving-the-trajectory-of-transpedicular-transdiscal-lumbar-screw-fixation-with-a-computer-assisted-3d-printed-custom-drill-guide
#3
Zhen-Xuan Shao, Jian-Shun Wang, Zhong-Ke Lin, Wen-Fei Ni, Xiang-Yang Wang, Ai-Min Wu
Transpedicular transdiscal screw fixation is an alternative technique used in lumbar spine fixation; however, it requires an accurate screw trajectory. The aim of this study is to design a novel 3D-printed custom drill guide and investigate its accuracy to guide the trajectory of transpedicular transdiscal (TPTD) lumbar screw fixation. Dicom images of thirty lumbar functional segment units (FSU, two segments) of L1-L4 were acquired from the PACS system in our hospital (patients who underwent a CT scan for other abdomen diseases and had normal spine anatomy) and imported into reverse design software for three-dimensional reconstructions...
2017: PeerJ
https://www.readbyqxmd.com/read/28712994/recognition-of-white-matter-bundles-using-local-and-global-streamline-based-registration-and-clustering
#4
REVIEW
Eleftherios Garyfallidis, Marc-Alexandre Côté, Francois Rheault, Jasmeen Sidhu, Janice Hau, Laurent Petit, David Fortin, Stephen Cunanne, Maxime Descoteaux
Virtual dissection of diffusion MRI tractograms is cumbersome and needs extensive knowledge of white matter anatomy. This virtual dissection often requires several inclusion and exclusion regions-of-interest that make it a process that is very hard to reproduce across experts. Having automated tools that can extract white matter bundles for tract-based studies of large numbers of people is of great interest for neuroscience and neurosurgical planning. The purpose of our proposed method, named RecoBundles, is to segment white matter bundles and make virtual dissection easier to perform...
July 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28711588/a-framework-for-computational-fluid-dynamic-analyses-of-patient-specific-stented-coronary-arteries-from-optical-coherence-tomography-images
#5
Susanna Migliori, Claudio Chiastra, Marco Bologna, Eros Montin, Gabriele Dubini, Cristina Aurigemma, Roberto Fedele, Francesco Burzotta, Luca Mainardi, Francesco Migliavacca
The clinical challenge of percutaneous coronary interventions (PCI) is highly dependent on the recognition of the coronary anatomy of each individual. The classic imaging modality used for PCI is angiography, but advanced imaging techniques that are routinely performed during PCI, like optical coherence tomography (OCT), may provide detailed knowledge of the pre-intervention vessel anatomy as well as the post-procedural assessment of the specific stent-to-vessel interactions. Computational fluid dynamics (CFD) is an emerging investigational tool in the setting of optimization of PCI results...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28710000/the-perisylvian-language-network-and-language-analytical-abilities
#6
Olga Kepinska, Egbert A J F Lakke, Eleanor M Dutton, Johanneke Caspers, Niels O Schiller
Aiming at exploring the brain's structural organisation underlying successful second language learning, we investigate the anatomy of the perisylvian language network in a group of healthy adults, consisting of participants with high and average language analytical abilities. Utilising deterministic tractography, six tracts per participant (left and right long direct segment, left and right indirect anterior segment and left and right indirect posterior segment) were virtually dissected and measurements pertaining to their microstructural organisation were collected...
July 11, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/28693000/a-new-active-contours-approach-for-finger-extensor-tendon-segmentation-in-ultrasound-images-using-prior-knowledge-and-phase-symmetry
#7
Nelson Martins, Saad Sultan, Diana Veiga, Manuel Ferreira, Filipa Teixeira, Miguel Coimbra
This work proposes a new approach for the segmentation of the extensor tendon in ultrasound images of the second metacarpophalangeal joint (MCPJ). The MCPJ is known to be frequently involved in early stages of rheumatic diseases like rheumatoid arthritis. The early detection and follow up of these diseases is important to start and adapt the treatments properly and, in that way, preventing irreversible damage of the joints. This work relies on an active contours framework, preceded by a phase symmetry preprocessing and with prior knowledge energies, to automatically identify the extensor tendon...
July 5, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28690952/targeted-radiofrequency-ablation-as-an-adjunct-in-treatment-of-lumbar-facet-cysts
#8
Jesse Hatgis, Michelle Granville, Aldo Berti, Robert E Jacobson
Lumbar facet cysts are frequently found in patients with facet degeneration and segmental instability. When the facet cyst is localized in the neural foramina and lateral recess or becomes large, it can cause radiculopathy or neurogenic claudication. These symptomatic cysts are typically treated interventionally with drainage and a corticosteroid injection or attempts via overinflation to rupture the cyst; however, these procedures have a significant recurrence rate (up to 50%) and often need to be repeated or lead to lumbar surgery if unsuccessful...
June 6, 2017: Curēus
https://www.readbyqxmd.com/read/28688203/assessment-of-colorectal-length-using-the-electromagnetic-capsule-tracking-system-a-comparative-validation-study-in-healthy-subjects
#9
E B Mark, J L Poulsen, A M Haase, J B Frøkjaer, V Schlageter, S M Scott, K Krogh, A M Drewes
AIM: We aimed to determine colorectal length with the 3D-Transit system by describing a 'centerline' of capsule movement and compare it to known anatomy, as determined by magnetic resonance imaging (MRI). Further, we aimed to test the day-to-day variation of colorectal length assessed with the system. METHOD: The 3D-Transit system consists of electromagnetic capsules that can be tracked as they traverse the gastrointestinal tract. 25 healthy subjects were examined with both 3D-Transit and MRI...
July 8, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28681477/optimal-image-reconstruction-using-multidetector-row-computed-tomography-to-facilitate-cardiac-resynchronization-therapy
#10
Yu Izawa, Shumpei Mori, Tatsuya Nishii, Hiroki Matsuzoe, Hiroshi Imada, Hideya Suehiro, Kazuhiko Nakayama, Kensuke Matsumoto, Hidekazu Tanaka, Sei Fujiwara, Koji Fukuzawa, Ken-Ichi Hirata
Preprocedural recognition of the segment of latest mechanical contraction along with the anatomy of the coronary venous system is important for successful and effective cardiac resynchronization therapy. We present a case of ischemic cardiomyopathy who underwent implantation of a cardiac resynchronization therapy device with a defibrillator, which was facilitated by preprocedural computed tomographic images reconstructed to visualize the left ventricular slab and the coronary venous system simultaneously on the cardiac contour...
July 2017: Echocardiography
https://www.readbyqxmd.com/read/28678704/auto-context-convolutional-neural-network-auto-net-for-brain-extraction-in-magnetic-resonance-imaging
#11
Seyed Sadegh Mohseni Salehi, Deniz Erdogmus, Ali Gholipour
Brain extraction or whole brain segmentation is an important first step in many of the neuroimage analysis pipelines. The accuracy and robustness of brain extraction, therefore, is crucial for the accuracy of the entire brain analysis process. State-of-the-art brain extraction techniques rely heavily on the accuracy of alignment or registration between brain atlases and query brain anatomy, and/or make assumptions about the image geometry; therefore have limited success when these assumptions do not hold or image registration fails...
June 28, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28667376/sexually-divergent-effect-of-comt-val-met-genotype-on-subcortical-volumes-in-schizophrenia
#12
Irene Bollettini, Marco Spangaro, Sara Poletti, Cristina Lorenzi, Adele Pirovano, Benedetta Vai, Enrico Smeraldi, Roberto Cavallaro, Francesco Benedetti
Structural and functional alterations of subcortical areas have been observed in schizophrenia. COMT Val108/158Met has been associated with schizophrenia and implicated in different cognitive and neurofunctional alterations. Recent studies suggested that COMT genotype influences neuronal growth. Genetic variations in COMT were associated with sexually dimorphic effects on enzymatic activity, brain anatomy and behavior suggesting that gender might be crucial in interpreting COMT-dependent effects. Based on these data, we investigated possible effects of the interaction between COMT Val108/158Met genotype and gender on subcortical volumes among 79 patients with schizophrenia...
June 30, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28663663/design-optimization-for-accurate-flow-simulations-in-3d-printed-vascular-phantoms-derived-from-computed-tomography-angiography
#13
Kelsey Sommer, Richard L Izzo, Lauren Shepard, Alexander R Podgorsak, Stephen Rudin, Adnan H Siddiqui, Michael F Wilson, Erin Angel, Zaid Said, Michael Springer, Ciprian N Ionita
3D printing has been used to create complex arterial phantoms to advance device testing and physiological condition evaluation. Stereolithographic (STL) files of patient-specific cardiovascular anatomy are acquired to build cardiac vasculature through advanced mesh-manipulation techniques. Management of distal branches in the arterial tree is important to make such phantoms practicable. We investigated methods to manage the distal arterial flow resistance and pressure thus creating physiologically and geometrically accurate phantoms that can be used for simulations of image-guided interventional procedures with new devices...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28663399/prediction-of-the-pre-morbid-3d-anatomy-of-the-proximal-humerus-based-on-statistical-shape-modelling
#14
S Poltaretskyi, J Chaoui, M Mayya, C Hamitouche, M J Bercik, P Boileau, G Walch
AIMS: Restoring the pre-morbid anatomy of the proximal humerus is a goal of anatomical shoulder arthroplasty, but reliance is placed on the surgeon's experience and on anatomical estimations. The purpose of this study was to present a novel method, 'Statistical Shape Modelling', which accurately predicts the pre-morbid proximal humeral anatomy and calculates the 3D geometric parameters needed to restore normal anatomy in patients with severe degenerative osteoarthritis or a fracture of the proximal humerus...
July 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28662061/ultra-high-field-upper-extremity-peripheral-nerve-and-non-contrast-enhanced-vascular-imaging
#15
Shailesh B Raval, Cynthia A Britton, Tiejun Zhao, Narayanan Krishnamurthy, Tales Santini, Vijay S Gorantla, Tamer S Ibrahim
OBJECTIVE: The purpose of this study was to explore the efficacy of Ultra-high field [UHF] 7 Tesla [T] MRI as compared to 3T MRI in non-contrast enhanced [nCE] imaging of structural anatomy in the elbow, forearm, and hand [upper extremity]. MATERIALS AND METHOD: A wide range of sequences including T1 weighted [T1] volumetric interpolate breath-hold exam [VIBE], T2 weighted [T2] double-echo steady state [DESS], susceptibility weighted imaging [SWI], time-of-flight [TOF], diffusion tensor imaging [DTI], and diffusion spectrum imaging [DSI] were optimized and incorporated with a radiofrequency [RF] coil system composed of a transverse electromagnetic [TEM] transmit coil combined with an 8-channel receive-only array for 7T upper extremity [UE] imaging...
2017: PloS One
https://www.readbyqxmd.com/read/28654385/3d-fusion-framework-for-infarction-and-angiogenesis-analysis-in-a-myocardial-infarct-minipig-model
#16
Xu Zhenzhen, Bo Tao, Yu Li, Jun Zhang, Xiaochao Qu, Feng Cao, Jimin Liang
The combination of different modality images can provide detailed and comprehensive information for the prognostic assessment and therapeutic strategy of patients with ischemic heart disease. In this study, a 3D fusion framework is designed to integrate coronary computed tomography (CT) angiography (CTA), 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]DG) positron emission tomography (PET)/CT, and [(68)Ga]-1,4,7-triazacyclononane-1,4,7-triacetic acid-(Arg-Gly-Asp)2 ([(68)Ga]-NOTA-PRGD2) PET/CT images of the myocardial infarction model in minipigs...
January 1, 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28652965/a-protocol-for-manual-segmentation-of-medial-temporal-lobe-subregions-in-7%C3%A2-tesla-mri
#17
D Berron, P Vieweg, A Hochkeppler, J B Pluta, S-L Ding, A Maass, A Luther, L Xie, S R Das, D A Wolk, T Wolbers, P A Yushkevich, E Düzel, L E M Wisse
Recent advances in MRI and increasing knowledge on the characterization and anatomical variability of medial temporal lobe (MTL) anatomy have paved the way for more specific subdivisions of the MTL in humans. In addition, recent studies suggest that early changes in many neurodegenerative and neuropsychiatric diseases are better detected in smaller subregions of the MTL rather than with whole structure analyses. Here, we developed a new protocol using 7 Tesla (T) MRI incorporating novel anatomical findings for the manual segmentation of entorhinal cortex (ErC), perirhinal cortex (PrC; divided into area 35 and 36), parahippocampal cortex (PhC), and hippocampus; which includes the subfields subiculum (Sub), CA1, CA2, as well as CA3 and dentate gyrus (DG) which are separated by the endfolial pathway covering most of the long axis of the hippocampus...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28648329/biomechanical-properties-of-3-dimensional-printed-volar-locking-distal-radius-plate-comparison-with-conventional-volar-locking-plate
#18
Sung-Jae Kim, Young-Hoon Jo, Wan-Sun Choi, Chang-Hun Lee, Bong-Gun Lee, Joo-Hak Kim, Kwang-Hyun Lee
PURPOSE: This study evaluated the biomechanical properties of a new volar locking plate made by 3-dimensional printing using titanium alloy powder and 2 conventional volar locking plates under static and dynamic loading conditions that were designed to replicate those seen during fracture healing and early postoperative rehabilitation. METHODS: For all plate designs, 12 fourth-generation synthetic composite radii were fitted with volar locking plates according to the manufacturers' technique after segmental osteotomy...
June 22, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28647774/automatic-identification-of-coronary-tree-anatomy-in-coronary-computed-tomography-angiography
#19
Qing Cao, Alexander Broersen, Michiel A de Graaf, Pieter H Kitslaar, Guanyu Yang, Arthur J Scholte, Boudewijn P F Lelieveldt, Johan H C Reiber, Jouke Dijkstra
An automatic coronary artery tree labeling algorithm is described to identify the anatomical segments of the extracted centerlines from coronary computed tomography angiography (CCTA) images. This method will facilitate the automatic lesion reporting and risk stratification of cardiovascular disease. Three-dimensional (3D) models for both right dominant (RD) and left dominant (LD) coronary circulations were built. All labels in the model were matched with their possible candidates in the extracted tree to find the optimal labeling result...
June 24, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28647748/single-level-anterior-cervical-corpectomy-and-fusion-using-a-new-3d-printed-anatomy-adaptive-titanium-mesh-cage-for-treatment-of-cervical-spondylotic-myelopathy-and-ossification-of-the-posterior-longitudinal-ligament-a-retrospective-case-series-study
#20
Teng Lu, Chao Liu, Baohui Yang, Jiantao Liu, Feng Zhang, Dong Wang, Haopeng Li, Xijing He
BACKGROUND The aim of this study was to evaluate the clinical and radiological outcomes of the use of a new 3D-printed anatomy-adaptive titanium mesh cage (AA-TMC) for single-level anterior cervical corpectomy and fusion (ACCF) in patients with cervical spondylotic myelopathy (CSM) and ossification of the posterior longitudinal ligament (OPLL). MATERIAL AND METHODS We retrospectively reviewed the records of 15 consecutive patients who underwent ACCF surgeries with AA-TMC implantation. The Japanese Orthopedic Association (JOA) scoring system, a visual analogue scale (VAS), the mean intervertebral height (MIBH) of the surgical segments, and the surgical segmental angle (SSA) were recorded preoperatively, immediately after surgery and at the final follow-up visit...
June 25, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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