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3D Anatomy

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https://www.readbyqxmd.com/read/29775596/digital-museum-of-retinal-ganglion-cells-with-dense-anatomy-and-physiology
#1
J Alexander Bae, Shang Mu, Jinseop S Kim, Nicholas L Turner, Ignacio Tartavull, Nico Kemnitz, Chris S Jordan, Alex D Norton, William M Silversmith, Rachel Prentki, Marissa Sorek, Celia David, Devon L Jones, Doug Bland, Amy L R Sterling, Jungman Park, Kevin L Briggman, H Sebastian Seung
When 3D electron microscopy and calcium imaging are used to investigate the structure and function of neural circuits, the resulting datasets pose new challenges of visualization and interpretation. Here, we present a new kind of digital resource that encompasses almost 400 ganglion cells from a single patch of mouse retina. An online "museum" provides a 3D interactive view of each cell's anatomy, as well as graphs of its visual responses. The resource reveals two aspects of the retina's inner plexiform layer: an arbor segregation principle governing structure along the light axis and a density conservation principle governing structure in the tangential plane...
May 17, 2018: Cell
https://www.readbyqxmd.com/read/29775014/-the-application-of-3d-reconstruction-in-investigating-the-frontal-sinus-drainage-pathway-based-on-computer-tomography-data
#2
Y Liu, X Q Ma, X H Sun, S Dai, J F Zhang, H B Li, X Ma, J Y Wang, Q Dou, J Y Tian, J P Jia
Objective: The aim of this study is to explore the value of 3D reconstruction technology based on computer tomography data in understanding the frontal sinus drainage pathway. Method: Three-dimensional reconstruction of DICOM data from 100 cases of sinus CT was performed by using Mimics 19.0 software. The 3D models were used to study types, the relative locations of frontal sinus and recess cells as well as the influence of the frontal sinus drainage pathway. Result: The 3D model of frontal sinus, frontal recess cells and frontal sinus drainage pathway were reconstructed successfully...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774599/deep-convolutional-neural-network-for-segmentation-of-knee-joint-anatomy
#3
Zhaoye Zhou, Gengyan Zhao, Richard Kijowski, Fang Liu
PURPOSE: To describe and evaluate a new segmentation method using deep convolutional neural network (CNN), 3D fully connected conditional random field (CRF), and 3D simplex deformable modeling to improve the efficiency and accuracy of knee joint tissue segmentation. METHODS: A segmentation pipeline was built by combining a semantic segmentation CNN, 3D fully connected CRF, and 3D simplex deformable modeling. A convolutional encoder-decoder network was designed as the core of the segmentation method to perform high resolution pixel-wise multi-class tissue classification for 12 different joint structures...
May 17, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29774187/multimodality-imaging-for-the-quantitative-assessment-of-mitral-regurgitation
#4
REVIEW
Pei G Chew, Katrina Bounford, Sven Plein, Dominik Schlosshan, John P Greenwood
The natural history of mitral regurgitation (MR) results in significant morbidity and mortality. Innovations in non-invasive imaging have provided new insights into the pathophysiology and quantification of MR, in addition to early detection of left ventricular (LV) dysfunction and prognostic assessment in asymptomatic patients. Transthoracic (TTE) and transesophageal (TOE) echocardiography are the mainstay for diagnosis, assessment and serial surveillance. However, the advance from 2D to 3D imaging leads to improved assessment and characterization of mitral valve (MV) disease...
April 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29774184/a-systematic-review-of-clinical-value-of-three-dimensional-printing-in-renal-disease
#5
Zhonghua Sun, Dongting Liu
The aim of this systematic review is to analyse current literature related to the clinical value of three-dimensional (3D) printed models in renal disease. A literature search of PubMed and Scopus databases was performed to identify studies reporting the clinical application and usefulness of 3D printed models in renal disease. Fifteen studies were found to meet the selection criteria and were included in the analysis. Eight of them provided quantitative assessments with five studies focusing on dimensional accuracy of 3D printed models in replicating renal anatomy and tumour, and on measuring tumour volume between 3D printed models and original source images and surgical specimens, with mean difference less than 10%...
April 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29771086/-design-of-cross-sectional-anatomical-model-focused-on-drainage-pathways-of-paranasal-sinuses
#6
Y Zha, W Lv, Y L Gao, Z Z Zhu, Z Q Gao
Objective: To design and produce cross-sectional anatomical models of paranasal sinuses for the purpose of demonstrating drainage pathways of each nasal sinus for the young doctors. Method: We reconstructed the three-dimensional model of sinuses area based on CT scan data, and divided it into 5 thick cross-sectional anatomy models by 4 coronal plane,which cross middle points of agger nasi cell, ethmoid bulla, posterior ethmoid sinuses and sphenoid sinus respectively. Then a 3D printerwas used to make anatomical cross-sectional anatomical models...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29770532/novel-approaches-to-study-coronary-vasculature-development-in-mice
#7
Hana Kolesová, Martin Bartoš, Wan Chin Hsieh, Veronika Olejníčková, David Sedmera
BACKGROUND: Coronary artery development is an intensely studied field. Mice are a popular genetic model for developmental studies, but there is no widely accepted protocol for high-throughput, high-resolution imaging of their developmental and adult coronary artery anatomy. RESULTS: Using tissue clearing protocols and confocal microscopy, we have analyzed embryonic and juvenile mouse hearts in Cx40:GFP knock-in models with a special focus on septal artery development...
May 17, 2018: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/29770296/an-overview-of-mechanical-circulatory-support-in-single-ventricle-patients
#8
REVIEW
Jacob R Miller, Timothy S Lancaster, Connor Callahan, Aaron M Abarbanell, Pirooz Eghtesady
The population of people with a single-ventricle is continually increasing due to improvements across the spectrum of medical care. Unfortunately, a proportion of these patients will develop heart failure. Often, for these patients, mechanical circulatory support (MCS) represents the only available treatment option. While single-ventricle patients currently represent a small proportion of the total number of patients who receive MCS, as the single-ventricle patient population increases, this number will increase as well...
April 2018: Translational Pediatrics
https://www.readbyqxmd.com/read/29770294/three-dimensional-modelling-and-three-dimensional-printing-in-pediatric-and-congenital-cardiac-surgery
#9
REVIEW
Laszlo Kiraly
Three-dimensional (3D) modelling and printing methods greatly support advances in individualized medicine and surgery. In pediatric and congenital cardiac surgery, personalized imaging and 3D modelling presents with a range of advantages, e.g., better understanding of complex anatomy, interactivity and hands-on approach, possibility for preoperative surgical planning and virtual surgery, ability to assess expected results, and improved communication within the multidisciplinary team and with patients. 3D virtual and printed models often add important new anatomical findings and prompt alternative operative scenarios...
April 2018: Translational Pediatrics
https://www.readbyqxmd.com/read/29764740/are-computed-tomography-3d-measurements-of-the-upper-airways-in-mouth-breathing-children-in-agreement-with-the-ent-clinical-diagnosis-of-obstruction
#10
Bruno César Ladeira Vidigal, Carolina Morsani Mordente, Paula Loureiro Cheib, Flávio Ricardo Manzi, Letícia Paiva Franco, Helena Maria Gonçalves Becker, Bernardo Quiroga Souki
INTRODUCTION: Imaging studies have hystorically been used to support the clinical otorhinolaryngological evaluation of the upper respiratory tract for the diagnosis of obstructive causes of oral breathing. OBJECTIVE: The objective of this study was to compare 3D volumetric measurements of nasal cavity, nasopharynx and oropharynx of obstructed mouth-breathing children with measurements of non-obstructed mouth-breathing children. METHODS: This retrospective study included 25 mouth-breathing children aged 5-9 years evaluated by otorhinolaryngological clinical examination, flexible nasoendoscopy and full-head multi-slice computed tomography...
March 11, 2018: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/29753444/a-biplanar-x-ray-approach-for-studying-the-3d-dynamics-of-human-track-formation
#11
Kevin G Hatala, David A Perry, Stephen M Gatesy
Recent discoveries have made hominin tracks an increasingly prevalent component of the human fossil record, and these data have the capacity to inform long-standing debates regarding the biomechanics of hominin locomotion. However, there is currently no consensus on how to decipher biomechanical variables from hominin tracks. These debates can be linked to our generally limited understanding of the complex interactions between anatomy, motion, and substrate that give rise to track morphology. These interactions are difficult to study because direct visualization of the track formation process is impeded by foot and substrate opacity...
May 9, 2018: Journal of Human Evolution
https://www.readbyqxmd.com/read/29753181/weighted-regularized-statistical-shape-space-projection-for-breast-3d-model-reconstruction
#12
Guillermo Ruiz, Eduard Ramon, Jaime García, Federico M Sukno, Miguel A González Ballester
The use of 3D imaging has increased as a practical and useful tool for plastic and aesthetic surgery planning. Specifically, the possibility of representing the patient breast anatomy in a 3D shape and simulate aesthetic or plastic procedures is a great tool for communication between surgeon and patient during surgery planning. For the purpose of obtaining the specific 3D model of the breast of a patient, model-based reconstruction methods can be used. In particular, 3D morphable models (3DMM) are a robust and widely used method to perform 3D reconstruction...
May 2, 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29750762/the-functional-anatomy-of-the-superficial-fat-compartments-of-the-face-a-detailed-imaging-study
#13
Thilo L Schenck, Konstantin C Koban, Alexander Schlattau, Konstantin Frank, Jonathan M Sykes, Stefan Targosinski, Katharina Erlbacher, Sebastian Cotofana
BACKGROUND: The superficial (subcutaneous) facial fat compartments contribute to the signs of facial aging, but a comprehensive anatomic description of their location and their functional behavior during the application of soft tissue fillers still remains elusive. METHODS: We investigated 30 fresh frozen cephalic specimens from 13 male and 17 female Caucasian body donors (age: 78.3 ± 14.2 years, body mass index: 23.1 ± 5.3 kg/m). Upright positioned contrast enhanced CT scans and additional MR imaging was performed...
March 15, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29749697/canine-and-feline-fundus-photography-and-videography-using-a-nonpatented-3d-printed-lens-adapter-for-a-smartphone
#14
Filipe Espinheira Gomes, Eric Ledbetter
OBJECTIVE: To describe an indirect funduscopy imaging technique for dogs and cats using low cost and widely available equipment: a smartphone, a three-dimensional (3D) printed indirect lens adapter, and a 40 diopters (D) indirect ophthalmoscopy lens. METHODS: Fundus videography was performed in dogs and cats using a 40D indirect ophthalmoscopy lens and a smartphone fitted with a 3D printed indirect lens adapter. All animals were pharmacologically dilated with topical tropicamide 1% solution...
May 11, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29748151/patient-specific-3d-printing-simulation-to-guide-complex-coronary-intervention
#15
Manuel Oliveira-Santos, Eduardo Oliveira Santos, Ana Vera Marinho, Luís Leite, Jorge Guardado, Vítor Matos, Guilherme Mariano Pego, João Silva Marques
The field of three-dimensional printing applied to patient-specific simulation is evolving as a tool to enhance intervention results. We report the first case of a fully simulated percutaneous coronary intervention in a three-dimensional patient-specific model to guide treatment. An 85-year-old female presented with symptomatic in-stent restenosis in the ostial circumflex and was scheduled for percutaneous coronary intervention. Considering the complexity of the anatomy, patient setting and intervention technique, we elected to replicate the coronary anatomy using a three-dimensional model...
May 7, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29744824/usefulness-of-personalized-three-dimensional-printed-model-on-the-satisfaction-of-preoperative-education-for-patients-undergoing-robot-assisted-partial-nephrectomy-and-their-families
#16
Jun Teishima, Yukihiro Takayama, Shogo Iwaguro, Tetsutaro Hayashi, Shogo Inoue, Keisuke Hieda, Shunsuke Shinmei, Ryoji Kato, Koji Mita, Akio Matsubara
OBJECTIVE: To clarify the usefulness of a personalized three-dimensional (3D) printed model of the kidney for preoperative education among patients who underwent robot-assisted partial nephrectomy (RAPN). METHODS: Twenty-nine cases of patients who planned to undergo RAPN and 19 of their families participated in this study. A three-dimensional model consisting of the kidney, tumors, ureter, inferior vena cava, and abdominal aorta in each case was generated using a Z Printer 450 based on the findings of preoperative enhanced CT...
May 9, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29736557/the-seamless-integration-of-three-dimensional-rotational-angiography-images-into-electroanatomical-mapping-systems-to-guide-catheter-ablation-of-atrial-fibrillation
#17
Satoshi Fujita, Eitaro Fujii, Yoshihiko Kagawa, Katsuhiro Inoue, Tsuyoshi Yamada, Masaaki Ito
It is important to visually confirm radiofrequency ablation lesions during atrial fibrillation (AF) ablation for procedural efficiency, which requires the integration of a three-dimensional (3D) left atrial image reconstructed from computed tomography (CT) or a magnetic resonance imaging. However, an EP Navigator allows seamless integration of 3D anatomy obtained through 3D rotational angiography (3D-ATG) into an electroanatomical mapping system. We hypothesized that 3D-ATG can be used during AF ablation while significantly reducing the effective dose (ED) and without compromising image morphology compared to a 3D-CT image...
May 7, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29731281/three-dimensional-angioarchitecture-and-microsurgical-treatment-of-arteriovenous-fistulas-at-the-craniocervical-junction
#18
So Fujimoto, Keisuke Takai, Hirofumi Nakatomi, Taichi Kin, Nobuhito Saito
Digital subtraction angiography (DSA) is the gold standard for diagnosing vascular malformations; however, difficulties are associated with visualizing the angioarchitecture of arteriovenous fistulas at the craniocervical junction (CCJ AVFs) using DSA because of their complex regional neurovascular anatomy. The present study evaluated the application of 3-dimensional computer graphics (3D CG) to the surgical planning of CCJ AVFs. Six patients with CCJ AVFs who underwent microsurgery and/or endovascular treatment were included...
May 3, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29730457/anterior-posterior-length-discrepancy-of-the-spinal-column-in-adolescent-idiopathic-scoliosis-a-3d-ct-study
#19
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Steve C N Hui, Max A Viergever, Winnie C W Chu, Jack C Y Cheng, René M Castelein
BACKGROUND CONTEXT: One of the characteristics of reported observations in adolescent idiopathic scoliosis (AIS) is that the thoracic spine is longer anteriorly than posteriorly, more pronounced around the apex than the transitional zones. This reversal of the normal kyphotic anatomy of the thoracic spine is related to questions of etiopathogenesis of AIS. The changes in the anatomy of the anterior column have been described rather in detail, however, the role of the posterior spinal column and the laminae has so far not been elucidated...
May 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29729609/virtual-surgical-planning-and-three-dimensional-printing-in-multidisciplinary-oncologic-chest-wall-resection-and-reconstruction-a-case-report
#20
Basel Sharaf, M Diya Sabbagh, Aparna Vijayasekaran, Mark Allen, Jane Matsumoto
INTRODUCTION: Primary sarcomas of the sternum are extremely rare and present the surgical teams involved with unique challenges. Historically, local muscle flaps have been utilized to reconstruct the resulting defect. However, when the resulting oncologic defect is larger than anticipated, local tissues have been radiated, or when preservation of chest wall muscles is necessary to optimize function, local reconstructive options are unsuitable. PRESENTATION OF CASE: Virtual surgical planning (VSP) and in house three-dimensional (3D) printing provides the platform for improved understanding of the anatomy of complex tumours, communication amongst surgeons, and meticulous pre-operative planning...
April 30, 2018: International Journal of Surgery Case Reports
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