Simulation of Hip Operations and Design of Custom-made Endoprostheses using Virtual Reality Techniques

2001 ◽  
Vol 40 (02) ◽  
pp. 74-77 ◽  
Author(s):  
J. Ehrhardt ◽  
W. Plötz ◽  
S. J. Pöppl ◽  
H. Handels
Keyword(s):  
Virtual Reality ◽  
Bone Tumor ◽  
Planning Process ◽  
3D Visualization ◽  
Three Dimensional ◽  
Tumor Surgery ◽  
Endoprosthetic Reconstruction ◽  
Virtual Planning ◽  
Custom Made ◽  
Bone Structures

AbstractIn this paper a system for the virtual planning of hip operations with endoprosthetic reconstruction and its application in bone tumor surgery is described. The system enables the simulation of the operation and the construction of a custom-made implant depending on the chosen resection planes and the patient’s anatomy. During the planning process integrated virtual reality techniques facilitate the interaction with the three-dimensional (3D) medical objects. Stereo viewing improves the perception of the 3D nature of bone structures and tumors. In comparison to conventional planning procedures, different operation strategies and their influence on the geometry of the custom-made endoprosthesis can be easily compared. Furthermore, the combination of multi-modal image information (CT and MR) enables an accurate 3D visualization of the bone tumor within the bone.

scholarly journals Overview: Virtual Reality in Medicine

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Claudio Pensieri ◽  
Maddalena Pennacchini
Keyword(s):  
Virtual Reality ◽  
Second Life ◽  
Surgical Simulation ◽  
3D Visualization ◽  
Economic Value ◽  
Three Dimensional ◽  
Communication Interface ◽  
Head Mounted Display ◽  
Wide Range ◽  
Interactive 3D

Background: Virtual Reality (VR) was defined as a collection of technological devices: “a computer capable of interactive 3D visualization, a head-mounted display and data gloves equipped with one or more position trackers”. Today, lots of scientists define VR as a simulation of the real world based on computer graphics, a three dimensional world in which communities of real people interact, create content, items and services, producing real economic value through e-Commerce.Objective: To report the results of a systematic review of articles and reviews published about the theme: “Virtual Reality in Medicine”.Methods: We used the search query string: “Virtual Reality”, “Metaverse”, “Second Life”, “Virtual World”, “Virtual Life” in order to find out how many articles were written about these themes. For the “Meta-review” we used only “Virtual Reality” AND “Review”. We searched the following databases: Psycinfo, Journal of Medical Internet Research, Isiknowledge till September 2011 and Pubmed till February 2012. We included any source published in either print format or on the Internet, available in all languages, and containing texts that define or attempt to define VR in explicit terms.Results: We retrieved 3,443 articles on Pubmed in 2012 and 8,237 on Isiknowledge in 2011. This large number of articles covered a wide range of themes, but showed no clear consensus about VR. We identified 4 general uses of VR in Medicine, and searched for the existing reviews about them. We found 364 reviews in 2011, although only 197 were pertinent to our aims: 1. Communication Interface (11 Reviews); 2. Medical Education (49 reviews); 3. Surgical Simulation (49 Reviews) and 4. Psychotherapy (88 Reviews).Conclusion: We found a large number of articles, but no clear consensus about the meaning of the term VR in Medicine. We found numerous articles published on these topics and many of them have been reviewed. We decided to group these reviews in 4 areas in order to provide a systematic overview of the subject matter, and to enable those interested to learn more about these particular topics.

Three-Dimensional Custom-Made Surgical Guides in Facial Feminization Surgery: Prospective Study on Safety and Accuracy

2021 ◽  
Author(s):  
Pierre Tawa ◽  
Nicolas Brault ◽  
Vlad Luca-Pozner ◽  
Laurent Ganry ◽  
Ghassen Chebbi ◽  
...  
Keyword(s):  
Maxillofacial Surgery ◽  
Three Dimensional ◽  
Cerebrospinal Fluid Leak ◽  
Mandibular Angle ◽  
Virtual Planning ◽  
Surgical Guides ◽  
Sinus Wall ◽  
Custom Made ◽  
Cutting Guides ◽  
Fluid Leak

Abstract Background Facial feminization surgery (FFS) includes several osseous modifications of the forehead, mandible and chin, procedures which require precision in order to provide the patient with a satisfactory result. Mispositioned osteotomies can lead to serious complications and bad aesthetic outcomes. Surgical cutting guides are commonly used in plastic and maxillofacial surgery to improve safety and accuracy. Yet, there is no report in the literature on the clinical application of cutting guides in FFS. Objectives The aim of this paper is to assess the safety and accuracy of custom surgical cutting guides in FFS procedures. Methods A prospective follow-up of forty-five patients regarding FFS with preoperative virtual planning and 3D custom-made surgical guides for anterior frontal sinus wall setback, mandibular angle reduction and/or osseous genioplasty was conducted. Accuracy (superimposing preoperative data on postoperative data by global registration with a 1 mm margin of error), safety (intradural intrusion for the forehead procedures and injury of the infra alveolar nerve for chin and mandibular angles) and patient satisfaction were assessed. Results A total of 133 procedures were documented. There was no cerebrospinal fluid leak on the forehead procedures nor any infra alveolar nerve or tooth root injury on both chin and mandibular angle operations (safety, 100%). Accuracy was 90.80 % on the forehead (n=25), 85.72% on the mandibular angles (n=44) and 96.20% on the chin (n=26). An overall satisfaction of 94.40% was recorded. Conclusions Custom-made surgical cutting guides could be a safe and accurate tool for forehead, mandibular angles and chin procedures for FFS.

Atlas-based Recognition of Anatomical Structures and Landmarks and the Automatic Computation of Orthopedic Parameters

2004 ◽  
Vol 43 (04) ◽  
pp. 391-397 ◽  
Author(s):  
H. Handels ◽  
W. Plötz ◽  
S. J. Pöppl ◽  
J. Ehrhardt
Keyword(s):  
Three Dimensional ◽  
Data Sets ◽  
Anatomical Landmarks ◽  
Landmark Detection ◽  
Virtual Planning ◽  
Automatic Computation ◽  
Registration Algorithm ◽  
Anatomical Point ◽  
Ct Data ◽  
Bone Structures

Summary Objective: This paper describes methods for the automatic atlas-based segmentation of bone structures of the hip, the automatic detection of anatomical point landmarks and the computation of orthopedic parameters to avoid the interactive, time-consuming preprocessing steps for the virtual planning of hip operations. Methods: Based on the CT data of the Visible Human Data Sets, two three-dimensional atlases of the human pelvis have been built. The atlases consist of labeled CT data sets, 3D surface models of the separated structures and associated anatomical point landmarks. The atlas information is transferred to the patient data by a non-linear gray value-based registration algorithm. A surface-based registration algorithm was developed to detect the anatomical landmarks on the patient’s bone structures. Furthermore, a software tool for the automatic computation of orthopedic parameters is presented. Finally, methods for an evaluation of the atlas-based segmentation and the atlas-based landmark detection are explained. Results: A first evaluation of the presented atlas-based segmentation method shows the correct labeling of 98.5% of the bony voxels. The presented landmark detection algorithm enables the precise and reliable localization of orthopedic landmarks. The accuracy of the landmark detection is below 2.5 mm. Conclusion: The atlas-based segmentation of bone structures, the atlas-based landmark detection and the automatic computation of orthopedic measures are suitable to essentially reduce the time-consuming user interaction during the pre-processing of the CT data for the virtual three-dimensional planning of hip operations.

Virtual Reality Angiogram vs 3-Dimensional Printed Angiogram as an Educational tool—A Comparative Study

Neurosurgery ◽  
2019 ◽  
Vol 85 (2) ◽  
pp. E343-E349 ◽  
Author(s):  
David Bairamian ◽  
Shinuo Liu ◽  
Behzad Eftekhar
Keyword(s):  
Virtual Reality ◽  
Depth Perception ◽  
3D Visualization ◽  
Three Dimensional ◽  
3D Models ◽  
Stereoscopic Depth ◽  
Educational Tool ◽  
Immersive Virtual Environment ◽  
3D Printed ◽  
Educational Potential

Abstract BACKGROUND Three-dimensional (3D) visualization of the neurovascular structures has helped preoperative surgical planning. 3D printed models and virtual reality (VR) devices are 2 options to improve 3D stereovision and stereoscopic depth perception of cerebrovascular anatomy for aneurysm surgery. OBJECTIVE To investigate and compare the practicality and potential of 3D printed and VR models in a neurosurgical education context. METHODS The VR angiogram was introduced through the development and testing of a VR smartphone app. Ten neurosurgical trainees from Australia and New Zealand participated in a 2-part interactive exercise using 3 3D printed and VR angiogram models followed by a questionnaire about their experience. In a separate exercise to investigate the learning curve effect on VR angiogram application, a qualified neurosurgeon was subjected to 15 exercises involving manipulating VR angiograms models. RESULTS VR angiogram outperformed 3D printed model in terms of resolution. It had statistically significant advantage in ability to zoom, resolution, ease of manipulation, model durability, and educational potential. VR angiogram had a higher questionnaire total score than 3D models. The 3D printed models had a statistically significant advantage in depth perception and ease of manipulation. The results were independent of trainee year level, sequence of the tests, or anatomy. CONCLUSION In selected cases with challenging cerebrovascular anatomy where stereoscopic depth perception is helpful, VR angiogram should be considered as a viable alternative to the 3D printed models for neurosurgical training and preoperative planning. An immersive virtual environment offers excellent resolution and ability to zoom, potentiating it as an untapped educational tool.

scholarly journals Enhancing the Student Learning in Engineering Education with the Virtual Reality Experiences

2018 ◽  
Vol 1 (1) ◽  
pp. 874-883
Author(s):  
Ali Sheharyar ◽  
Othmane Bouhali
Keyword(s):  
Virtual Reality ◽  
Engineering Education ◽  
Daily Life ◽  
3D Visualization ◽  
Three Dimensional ◽  
Academic Community ◽  
Virtual Reality Technology ◽  
American University ◽  
Constructive Learning ◽  
University Campuses

Virtual reality (VR), defined as three-dimensional immersive and realistic environment, is pushing its way into becoming the mainstream in many aspects of daily life. It promises to provide more engaging and immersive experiences in several areas, including training, safety and education. In the education sector particularly, it can increase student engagement, provide active and constructive learning, and provide a platform for visualizing complex concepts concretely. Texas A&M University at Qatar (TAMUQ), one of six American university campuses in Qatar, was one of the first in adopting the virtual reality technology in the education and research in the region. It acquired its first immersive VR system in 2008 and the second more sophisticated system in 2016. It organizes an annual project competition to promote the use of virtual reality and 3D visualization in the academic community. This paper describes the salient VR projects completed in last few years at TAMUQ.

scholarly journals High Infection Rate Outcomes in Long-bone Tumor Surgery with Endoprosthetic Reconstruction in Adults: A Systematic Review

2013 ◽  
Vol 471 (6) ◽  
pp. 2017-2027 ◽  
Author(s):  
Antonella Racano ◽  
Theresa Pazionis ◽  
Forough Farrokhyar ◽  
Benjamin Deheshi ◽  
Michelle Ghert
Keyword(s):  
Systematic Review ◽  
Infection Rate ◽  
Bone Tumor ◽  
Long Bone ◽  
Tumor Surgery ◽  
High Infection Rate ◽  
Endoprosthetic Reconstruction ◽  
High Infection
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