scholarly journals Review of temporal bone dissection teaching: how it was, is and will be

2009 ◽  
Vol 124 (2) ◽  
pp. 119-125 ◽  
Author(s):  
A P George ◽  
R De
Keyword(s):  
Virtual Reality ◽  
Temporal Bone ◽  
Three Dimensional ◽  
Review Of The Literature ◽  
Anatomical Dissection ◽  
Pubmed Database ◽  
Fresh Frozen ◽  
History Of ◽  
Temporal Bone Anatomy ◽  
Three Dimensional Models

AbstractObjective:We aimed to review the history of anatomical dissection, and to examine how modern educational techniques will change the way temporal bone dissection is taught to otolaryngology trainees.Method:Review of the literature using Medline, Embase and PubMed database searches.Results:Temporal bone anatomy has traditionally been taught using cadaveric specimens. However, resources such as three-dimensional reconstructed models and ‘virtual reality’ temporal bone simulators have a place in educating the otolaryngology trainee.Conclusion:We should encourage the use of fresh frozen cadaveric temporal bone specimens for future otologists. Artificial three-dimensional models and virtual reality temporal bone simulators can be used to educate junior trainees, thus conserving the scarce resource of cadaveric bones.

Development of a virtual reality clinically oriented temporal bone anatomy module with randomised control study of three-dimensional display technology

2020 ◽  
pp. bmjstel-2020-000592
Author(s):  
Bridget Copson ◽  
Sudanthi Wijewickrema ◽  
Laurence Sorace ◽  
Randall Jones ◽  
Stephen O'Leary
Keyword(s):  
Virtual Reality ◽  
Learning Outcomes ◽  
Temporal Bone ◽  
Clinical Relevance ◽  
Test Score ◽  
Three Dimensional ◽  
Large Effect Size ◽  
Display Technology ◽  
Temporal Bone Anatomy ◽  
Total Test

ObjectiveTo investigate the effectiveness of a virtual reality (VR), three-dimensional (3D) clinically orientated temporal bone anatomy module, including an assessment of different display technologies.MethodsA clinically orientated, procedural and interactive anatomy module was generated from a micro-CT of a cadaveric temporal bone. The module was given in three different display technologies; 2D, 3D with monoscopic vision, and 3D with stereoscopic vision. A randomised control trial assessed the knowledge acquisition and attitudes of 47 medical students though a pretutorial and post-tutorial questionnaire. The questionnaire included questions identifying anatomic structures as well as understanding structural relations and clinical relevance. Furthermore, a five-point Likert scale assessed the students’ attitudes to the module and alternative learning outcomes, such as interest in otology and preparedness for clinical rotations.ResultsAs a whole cohort, the total test score improved significantly, with a large effect size (p≤0.005, Cohen’s d=1.41). The 23 students who returned the retention questionnaire had a significant improvement in total test score compared with their pretutorial score, with a large effect size (p≤0.005, Cohen’s d=0.83). Display technology did not influence the majority of learning outcomes, with the exception of 3D technologies, showing a significantly improvement in understanding of clinical relevance and structural relations (p=0.034). Students preferred 3D technologies for ease of use, perceived effectiveness and willingness to use again.ConclusionsThe developed VR temporal bone anatomy tutor was an effective self-directed education tool. 3D technology remains valuable in facilitating spatial learning and superior user satisfaction.

Three-Dimensional Computer Reconstruction of a Temporal Bone

1989 ◽  
Vol 101 (5) ◽  
pp. 522-526 ◽  
Author(s):  
Charles Lutz ◽  
Akira Takagi ◽  
Ivo P. Janecka ◽  
Isamu Sando
Keyword(s):  
Temporal Bone ◽  
Internal Carotid ◽  
Computer Graphic ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Computer Reconstruction ◽  
Temporal Bone Anatomy ◽  
Bone Structures ◽  
Graphic Software ◽  
Computer Graphics System

The complexities of the temporal bone and the critical inter-relationships among its key structures can be simplified with three-dimensional computer-assisted reconstruction. Knowledge of the topography of these structures and their mutual relationships in essential in any surgical approach to the temporal bone. Sixty sagittal histologic sections of a normal left temporal bone were examined. Each section, 30 μm in thickness, was optically enlarged. Segments representing the facial nerve, internal carotid artery, and inner ear structures from individual slides were traced and data were entered into a computer. A personal computer was used for data processing and analysis. Graphic software developed in our laboratory generated images with x-y-z coordinates that could be rotated In any plane. The high resolution of the computer graphics system, combined with the precision of histologic sections, permitted study of the critical three-dimensional anatomic relationships among essential intratemporal bone structures. The capability of reproducing individual and joint images of the intratemporal bone structures and viewing them from all surgical angles gives skull base and otologic surgeons Important topographic guidance. Accurate spatial measurements of temporal bone anatomy are now possible with the application of computer graphic technology.

scholarly journals The environmental navigation using geometric virtual reality

2018 ◽  
Vol 10 (6) ◽  
pp. 168781401878363 ◽  
Author(s):  
Nien-Tsu Hu ◽  
Pu-Sheng Tsai ◽  
Ter-Feng Wu ◽  
Jen-Yang Chen ◽  
Lin Lee
Keyword(s):  
Virtual Reality ◽  
System Architecture ◽  
Three Dimensional ◽  
Wearable Devices ◽  
Wireless Transmission ◽  
Wearable Electronics ◽  
Virtual Reality Environment ◽  
Landscape Models ◽  
Three Dimensional Models ◽  
Animation Software

This article explores the construction of a geometric virtual reality platform for the environmental navigation. Non-panoramic photos and wearable electronics with Bluetooth wireless transmission functions are used to combine the user’s actions with the virtual reality environment in a first-person virtual reality platform. The 3ds Max animation software is used to create three-dimensional models of real buildings. These models are combined with the landscape models in Unity3d to create a virtual campus scene that matches real landscape. The wearable device included an ATMega168 chip as a microcontroller; it was connected to a three-axis accelerometer, a gyroscope, and a Bluetooth transmitter to detect and transmit various movements of the user. Although the development of the mechatronics, software, and engineering involved in the three-dimensional animation are the main objective, we believe that the methods and techniques can be modified for various purposes. After the system architecture was created and the operations of the platform were verified, wearable devices and virtual reality scenes are concluded to be able to be used together seamlessly.

scholarly journals Morpholithodynamics of lagoonal straits of the North-Eastern Sakhalin

2019 ◽  
pp. 79-94
Author(s):  
V. V. Afanasev
Keyword(s):  
Additional Data ◽  
Three Dimensional ◽  
Remote Sensing Data ◽  
Water Area ◽  
The North ◽  
North Eastern ◽  
Geological Information ◽  
History Of ◽  
Three Dimensional Models ◽  
And Migration

The results of the analysis of geospatial and geological information on the structure and dynamics of the lagoon coast of the North-Eastern Sakhalin are presented. On the basis of a number of parameters of the coastal erosion-accumulation processes and migration of lagoon straits during the period 1927–2014. the morpholithodynamics system of the North-Eastern Sakhalin was considered. The volume of sediments transported during the migration of the straits, was estimated with the help of three-dimensional models, in which, parallel with time-averaged areas of erosion and accumulation, additional data were used, namely: bathymetry of the straits and adjacent water area, characteristics of the relief of the barrier forms and geological information obtained as a result of georadar survey and drilling. Georadar data, together with remote sensing data, have made it possible to create a model of sedimentation, which formed the basis for the analysis of the history of the coast formation beyond the period of observations. Currently, we can trace the situation as long as to the middle of the XIXth century.

A brief history of the filling simulation of injection moulding

2008 ◽  
Vol 223 (3) ◽  
pp. 711-721 ◽  
Author(s):  
D Cardozo
Keyword(s):  
Computer Simulation ◽  
Injection Moulding ◽  
Three Dimensional ◽  
History Of ◽  
Dimensional Models ◽  
Three Dimensional Models ◽  
Set Up ◽  
Filling Simulation ◽  
Basic Features ◽  
Plastic Parts

Injection moulding is one of the most important manufacturing processes for mass production of complex plastic parts. The quality of injection moulded parts depends not only on the material, shape, and function of the part design, but also on how the material is processed during moulding. Traditional design approaches based on intuition, prior experience, and trial-and-error methodology have been becoming less efficient and effective. With advances in numerical modelling and computer simulation techniques, there have been tremendous efforts made to develop computer simulation tools to facilitate injection moulding design and process set-up. This paper reviews the history of research and development in the filling simulation of injection moulding. The existing models are classified into three categories: one-dimensional models, 2.5D models, and three-dimensional models. The basic features and relative key techniques about these models have been discussed. The techniques of tacking the moving flow front have also been presented. It is then followed by conclusions and discussions of these mentioned models.

Temporal bone Pneumatization in Otosclerosis

2008 ◽  
Vol 139 (6) ◽  
pp. 850-853 ◽  
Author(s):  
Daniel T. Ganc ◽  
Robert W. Jyung
Keyword(s):  
Temporal Bone ◽  
Statistical Significance ◽  
Three Dimensional ◽  
Neck Surgery ◽  
Adult Patients ◽  
Control Group ◽  
Test Analysis ◽  
Temporal Bone Pneumatization ◽  
History Of ◽  
Temporal Bones

Objectives To determine whether there is a difference in the pneumatization of temporal bones with otosclerosis versus normal temporal bones. Methods A retrospective study of 46 ears from 24 adult patients with otosclerosis and 64 ears from 47 adult patients in a control group. The study group included temporal bone CT scans available from patients with otosclerosis. The control group consisted of patients who had temporal bone CTs for reasons likely unrelated to a history of middle ear disease. Data were obtained with a virtual reality system that allows three-dimensional manipulation and analysis. Results The temporal bone pneumatization for the otosclerosis group was 4.82 ± 2.27 cm3 vs 6.06 ± 2.71 cm3 for the control group. Two-sample t test analysis revealed no statistical significance ( P = 0.059) between pneumatization in the control vs otosclerosis groups. Conclusion There is no difference in temporal bone pneumatization between patients with otosclerosis and a control population. Therefore, temporal bone pneumatization by itself is not an adequate explanation for the apparent protective effect of otosclerosis against otitis media. © 2008 American Academy of Otolaryngology-Head and Neck Surgery Foundation. All rights reserved.

scholarly journals Virtual Palimpsest and Pentimenti for an Architecture in Reality

2021 ◽  
Author(s):  
◽  
Keegan Hannaway
Keyword(s):  
Virtual Reality ◽  
Historical Context ◽  
Three Dimensional ◽  
Design Tool ◽  
City Council ◽  
Architectural Theory ◽  
Scaled Model ◽  
History Of ◽  
Modernist Architecture ◽  
A Site

<p>Behind every site is an unseen history. Before us, countless people have lived their lives through an ever evolving environment. This research examines how a process of uncovering site specific architectural and cultural histories using virtual reality can facilitate for the development of a design intervention that builds upon former histories of the site.  This has been done through a process of digitally unveiling traces of historic architectures, using notions of palimpsest and pentimento.   Palimpsest and pentimento are terms from art and literary studies which are concerned with the physical traces of historic processes left on parchment and canvas, the reworking and adding to a new piece that reflects what was before. Palimpsest as an architectural theory is somewhat related to ideas of historicism in 1980s post-modernist architecture.  This research was undertaken initially through conventional historical research using archival plans and photographs of former buildings on the site. These were obtained from sources such as the Wellington City Council and National Library of New Zealand in order to accurately determine what has previously existed. This history was then visually represented in three-dimensional digital models and overlaid onto a model of the site.  By digitally rebuilding each built intervention, users can occupy each phase separately or simultaneously in a virtual reality environment. This full scaled model enables an accurate visualisation of how the historic architecture really existed. Ideas such as scale, phenomenology, depth, form, and detail can be represented in virtual reality in a way that allows a greater understanding than simple flat images and plans.  This process then leads to a way of developing an architecture based off what made the previous buildings successful. Once Again using virtual reality, this time as a design tool, to root the new building in to its historical context, creating a deeper architectural experience.  Developing this process of using the history of a site as a tool for generating a new architecture allows for a greater meaning of the site, and for a deeper meaning to the architecture.</p>

Ergonomic Provisions of the Shelter's Safety at the Chernobyl Nuclear Power Plant

1998 ◽  
Vol 42 (10) ◽  
pp. 740-744
Author(s):  
Gennady E. Zhuravlyov
Keyword(s):  
Virtual Reality ◽  
Human Factors ◽  
Nuclear Power ◽  
Three Dimensional ◽  
Training Needs ◽  
Chernobyl Nuclear Power Plant ◽  
Psychological Training ◽  
Shelter Workers ◽  
Three Dimensional Models ◽  
Traffic Organization

This paper outlines the main Human Factors/Ergonomic tasks to be solved to enhance the safety of the Shelter (Sarcophagus) of the Chernobyl Nuclear Power Plants's destroyed Unit #4 during current maintanance and forthcoming reconstruction as were observed during our visit to this site. The convential Human Factors problems are connected to personnel activities such as: traffic organization, radiation cartography, communications, monitoring of the personnel activity inside the Shelter, protective clothes, instruments, illumination, and ventilation. Macroergonomic problems include: uncertainty, risk to health, and high technical level of instruments and equipment used. Shelter workers have to assimilate many different professions and the scope of their training needs to be very large. Both situational and spatial uncertainties of the Shelter set special training problems. Three dimensional models and virtual reality tools are needed to help in solve these problems. Psychological training should also be conducted. The investigation was performed within the framework of cooperation between Russian an American ergonomists (Parsons et al. 1992).

Tensor Veli Palatinopexy as a Novel Treatment for Eustachian Tube Dysfunction: A Cadaveric Feasibility Study

2020 ◽  
pp. 019459982095240
Author(s):  
Eric A. Eisen ◽  
Xiaotian Wu ◽  
Christiaan A. Rees ◽  
David A. Pastel ◽  
Joseph A. Paydarfar ◽  
...  
Keyword(s):  
Eustachian Tube ◽  
Study Design ◽  
Medical Center ◽  
Academic Medical Center ◽  
Three Dimensional ◽  
Intraoperative Computed Tomography ◽  
Novel Treatment ◽  
Fresh Frozen ◽  
Tensor Veli Palatini Muscle ◽  
Three Dimensional Models

Objective To demonstrate the feasibility of a novel procedure whereby a suture is placed transorally in the tensor veli palatini muscle to tighten it, thereby dilating the cartilaginous portion of the eustachian tube (ET). Study Design The study design was a prospective cadaveric experiment to examine the feasibility of a novel treatment for ET dysfunction. Setting Academic medical center in a research-oriented operating room with intraoperative computed tomography (CT) capabilities. Methods Seven fresh-frozen cadaver heads were obtained, each of which was thawed for 36 hours prior to use. The preprocedural volumes of the cartilaginous ET were measured by filling the ET with an iodine-containing radiocontrast agent via the nasopharynx and then obtaining CT images. Submucosal flaps in the soft palate were raised, and sutures were placed in the tensor veli palatini bilaterally to increase tension. After completion of the procedure, contrast placement and CT imaging were repeated. Three-dimensional models of the ETs were created, and the volumes were measured and compared. Results Of the 14 ETs evaluated, 13 showed an increase in postprocedure volume. On average, postprocedure volumes showed a 57% increase from preprocedure volumes (mean relative change, 57.1%; P = .013). Conclusion Placement of a tension-holding suture in the tensor veli palatini muscle can reliably dilate the cartilaginous portion of the ET. Such a procedure may be useful in the treatment of ET dysfunction.

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