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3D Anatomy

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https://www.readbyqxmd.com/read/28720406/mri-anatomical-preoperative-evaluation-of-distally-based-peroneus-brevis-muscle-flap-in-reconstructive-surgery-of-the-lower-limb
#1
Federico Barbera, Fulvio Lorenzetti, Ricccardo Marsili, Matteo Ragoni, Andrea Lisa, Virna Zampa, Marcello Pantaloni
BACKGROUND: The distally based peroneus brevis muscle flap has proved to be a simple solution for small- to moderate-sized wounds of the lower limb. The length of the muscle belly suitable for coverage is a crucial parameter. In this study, we evaluated the capability of 3D MRI of the lower limb to measure it preoperatively. METHODS: Between 2008 and 2017, 32 patients with lower limb defects underwent preoperative MRI to measure the peroneus brevis muscle length...
June 27, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28719062/immersive-virtual-reality-as-a-teaching-tool-for-neuroanatomy
#2
Katelyn Stepan, Joshua Zeiger, Stephanie Hanchuk, Anthony Del Signore, Raj Shrivastava, Satish Govindaraj, Alfred Iloreta
BACKGROUND: Three-dimensional (3D) computer modeling and interactive virtual reality (VR) simulation are validated teaching techniques used throughout medical disciplines. Little objective data exists supporting its use in teaching clinical anatomy. Learner motivation is thought to limit the rate of utilization of such novel technologies. The purpose of this study is to evaluate the effectiveness, satisfaction, and motivation associated with immersive VR simulation in teaching medical students neuroanatomy...
July 18, 2017: International Forum of Allergy & Rhinology
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/28716518/virtual-animation-of-victim-specific-3d-models-obtained-from-ct-scans-for-forensic-reconstructions-living-and-dead-subjects
#4
C Villa, K B Olsen, S H Hansen
Post-mortem CT scanning (PMCT) has been introduced at several forensic medical institutions many years ago and has proved to be a useful tool. 3D models of bones, skin, internal organs and bullet paths can rapidly be generated using post-processing software. These 3D models reflect the individual physiognomics and can be used to create whole-body 3D virtual animations. In such way, virtual reconstructions of the probable ante-mortem postures of victims can be constructed and contribute to understand the sequence of events...
July 5, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28714118/body-wall-structure-in-the-starfish-asterias-rubens
#5
Liisa M Blowes, Michaela Egertová, Yankai Liu, Graham R Davis, Nick J Terrill, Himadri S Gupta, Maurice R Elphick
The body wall of starfish is composed of magnesium calcite ossicles connected by collagenous tissue and muscles and it exhibits remarkable variability in stiffness, which is attributed to the mechanical mutability of the collagenous component. Using the common European starfish Asterias rubens as an experimental animal, here we have employed a variety of techniques to gain new insights into the structure of the starfish body wall. The structure and organisation of muscular and collagenous components of the body wall were analysed using trichrome staining...
July 16, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28712105/evaluation-of-a-low-cost-3d-printed-model-for-bronchoscopy-training
#6
Matteo Parotto, Joshua Qua Jiansen, Ahmed AboTaiban, Svetlana Ioukhova, Alisher Agzamov, Richard Cooper, Gerald O'Leary, Massimiliano Meineri
BACKGROUND: Flexible bronchoscopy is a fundamental procedure in anesthesia and critical care medicine. Learning this procedure is a complex task, but the use of simulation-based training provides significant advantages like enhanced patient safety. Access to bronchoscopy simulators may be limited in low resources settings. We developed a low-cost 3D printed bronchoscopy training model. METHODS: A parametric airway model was obtained from an online medical model repository and fabricated using a low-cost 3D printer...
July 16, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28711588/a-framework-for-computational-fluid-dynamic-analyses-of-patient-specific-stented-coronary-arteries-from-optical-coherence-tomography-images
#7
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/28706865/echocardiography-of-the-tricuspid-valve-acknowledgements
#8
Jamahal Luxford, Levi Bassin, Michael D'Ambra
The tricuspid valve (TV), although occasionally considered "neglected" is the subject of renewed and increasing interest. Factors include an awareness that tricuspid value dysfunction is influential in patient outcomes, an improving understanding of valve anatomy and function and evolving techniques available to address tricuspid regurgitation. Tricuspid regurgitation (TR) can be classified as being due to primary diseases of the valve or functional in nature, with the majority being functional. Whilst it was previously believed that such functional TR, resulting from left sided disease, would resolve after correction of the underlying pathology this is now known not to be true...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28706589/catheter-ablation-of-atrial-fibrillation-facilitated-by-preprocedural-three-dimensional-transesophageal-echocardiography-long-term-outcome
#9
Klaus Kettering, Felix Gramley, Stephan von Bardeleben
AIM: To evaluate the long-term outcome of catheter ablation of atrial fibrillation (AF) facilitated by preprocedural three-dimensional (3-D) transesophageal echocardiography. METHODS: In 50 patients, 3D transesophageal echocardiography (3D TEE) was performed immediately prior to an ablation procedure (paroxysmal AF: 30 patients, persistent AF: 20 patients). The images were available throughout the ablation procedure. Two different ablation strategies were used. In most of the patients with paroxysmal AF, the cryoablation technique was used (Arctic Front Balloon, CryoCath Technologies/Medtronic; group A2)...
June 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28705216/surgical-management-of-hawkins-type-iii-talar-neck-fracture-through-the-approach-of-medial-malleolar-osteotomy-and-mini-plate-for-fixation
#10
Hui Liu, Zhida Chen, Wenrong Zeng, Yuanfei Xiong, Yongzhi Lin, Huacheng Zhong, Jin Wu
BACKGROUND: Fractures of the talar neck are relatively uncommon yet current interventions suffer from a high incidence of complications and poor functional outcomes. In the present study, we report a surgical treatment of Hawkins type III talar neck fracture through the approach of medial malleolar osteotomy and mini-plate for fixation and discuss the therapeutic effects after long-term follow-up. METHODS: From January 2010 to January 2015, 21 patients with 22 fractures were treated using this approach within days of sustaining the injury...
July 14, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28703332/validation-of-biplane-high-speed-fluoroscopy-combined-with-two-different-non-invasive-tracking-methodologies-for-measuring-in-vivo-distal-limb-kinematics-of-the-horse
#11
S M Geiger, E Reich, P Böttcher, S Grund, J Hagen
BACKGROUND: Biplane high-speed fluoroscopy is a new method for gait analysis of the equine distal extremity. This is the first study validating the non-invasive tracking possibilities (Autoscoping and Scientific Rotoscoping) taking equine anatomy into account. OBJECTIVES: To determine the resolution with which Autoscoping and Scientific Rotoscoping depict motion of the equine phalanges in comparison to the invasive gold standard marker-based registration. STUDY DESIGN: Comparative ex vivo study...
July 13, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28700420/comparison-of-2d-and-3d-video-displays-for-teaching-vitreoretinal-surgery
#12
Nisarg Chhaya, Omar Helmy, Niloofar Piri, Agustina Palacio, Shlomit Schaal
PURPOSE: To compare medical students' learning uptake and understanding of vitreoretinal surgeries by watching either 2D or 3D video recordings. METHODS: Three vitreoretinal procedures (tractional retinal detachment, exposed scleral buckle removal, and four-point scleral fixation of an intraocular lens [TSS]) were recorded simultaneously with a conventional recorder for two-dimensional viewing and a VERION 3D HD system using Sony HVO-1000MD for three-dimensional viewing...
July 11, 2017: Retina
https://www.readbyqxmd.com/read/28696484/vaginal-changes-due-to-varying-degrees-of-rectocele-prolapse-a-computational-study
#13
Arnab Chanda, Isuzu Meyer, Holly E Richter, Mark E Lockhart, Fabia R D Moraes, Vinu U Unnikrishnan
Pelvic organ prolapse (POP), downward descent of the pelvic organs resulting in a protrusion of the vagina, is a highly prevalent condition, responsible for 300,000 surgeries in the United States annually. Rectocele, a posterior vaginal wall prolapse of the rectum is the second most common type of POP after cystocele. A rectocele usually manifests itself along with other types of prolapse with multi-compartment pelvic floor defects. To date, the specific mechanics of rectocele formation are poorly understood, which does not allow its early stage detection and progression prediction over time...
July 11, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28690511/neurotessmesh-a-tool-for-the-generation-and-visualization-of-neuron-meshes-and-adaptive-on-the-fly-refinement
#14
Juan J Garcia-Cantero, Juan P Brito, Susana Mata, Sofia Bayona, Luis Pastor
Gaining a better understanding of the human brain continues to be one of the greatest challenges for science, largely because of the overwhelming complexity of the brain and the difficulty of analyzing the features and behavior of dense neural networks. Regarding analysis, 3D visualization has proven to be a useful tool for the evaluation of complex systems. However, the large number of neurons in non-trivial circuits, together with their intricate geometry, makes the visualization of a neuronal scenario an extremely challenging computational problem...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28688203/assessment-of-colorectal-length-using-the-electromagnetic-capsule-tracking-system-a-comparative-validation-study-in-healthy-subjects
#15
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/28688157/the-application-of-3-dimensional-printing-for-preoperative-planning-in-oral-and-maxillofacial-surgery-in-dogs-and-cats
#16
Jenna N Winer, Frank J M Verstraete, Derek D Cissell, Steven Lucero, Kyriacos A Athanasiou, Boaz Arzi
OBJECTIVE: To describe the application of 3-dimensional (3D) printing in advanced oral and maxillofacial surgery (OMFS) and to discuss the benefits of this modality in surgical planning, student and resident training, and client education. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs (n = 28) and cats (n = 4) with 3D printing models of the skulls. METHODS: The medical records of 32 cases with 3D printing prior to major OMFS were reviewed...
July 8, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28685477/design-and-implementation-of-a-prototype-head-and-neck-phantom-for-the-performance-evaluation-of-gamma-imaging-systems
#17
Mohammed S Alqahtani, John E Lees, Sarah L Bugby, Piyal Samara-Ratna, Aik H Ng, Alan C Perkins
BACKGROUND: A prototype anthropomorphic head and neck phantom has been designed to simulate the adult head and neck anatomy including some internal organs and tissues of interest, such as thyroid gland and sentinel lymph nodes (SLNs). The design of the head and neck phantom includes an inner jig holding the simulated SLNs and thyroid gland. The thyroid gland structure was manufactured using three-dimensional (3D) printing taking into consideration the morphology and shape of a healthy adult thyroid gland...
December 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/28680895/visualization-of-the-capitellum-during-elbow-arthroscopy-a-comparison-of-3-portal-techniques
#18
David P Trofa, Stephanie M Gancarczyk, Joseph M Lombardi, Eric C Makhni, Charles A Popkin, Christopher S Ahmad
BACKGROUND: Capitellar osteochondritis dissecans (OCD) is a debilitating condition of unknown etiology for which various arthroscopic treatments are available. Prior data suggest that greater than 75% of the capitellum can be visualized arthroscopically through a dual lateral portal approach. However, there is no literature assessing arthroscopic visualization of the capitellum via alternative portals. PURPOSE: To determine the percentage of capitellum visualized using the dual lateral, distal ulnar and soft spot, and posterolateral and soft spot portal configurations in a cadaver model...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28678704/auto-context-convolutional-neural-network-auto-net-for-brain-extraction-in-magnetic-resonance-imaging
#19
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/28673795/use-of-3d-reconstruction-cloacagrams-and-3d-printing-in-cloacal-malformations
#20
Jennifer J Ahn, Margarett Shnorhavorian, Anne-Marie E Amies Oelschlager, Beth Ripley, Giridhar M Shivaram, Jeffrey R Avansino, Paul A Merguerian
INTRODUCTION: Cloacal anomalies are complex to manage, and the anatomy affects prognosis and management. Assessment historically includes examination under anesthesia, and genitography is often performed, but these do not consistently capture three-dimensional (3D) detail or spatial relationships of the anatomic structures. Three-dimensional reconstruction cloacagrams can provide a high level of detail including channel measurements and the level of the cloaca (<3 cm vs. >3 cm), which typically determines the approach for surgical reconstruction and can impact long-term prognosis...
June 20, 2017: Journal of Pediatric Urology
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