Development and evaluation of prototype virtual reality telemedicine system for asynchronous gait analysis

2014 ◽  
Author(s):  
M.S. Khan ◽  
W. Chan ◽  
V. Charissis ◽  
D.K. Harrison ◽  
S. Sakellariou
Keyword(s):  
Virtual Reality ◽  
Gait Analysis ◽  
Telemedicine System

Affordable Human Gait Analysis Using a Virtual Reality-Based Platform

2020 ◽  
Vol 15 (4) ◽  
pp. 307-313
Author(s):  
Juan David Guzman ◽  
Diego Enrique Guzman ◽  
Carlos Felipe Rengifo
Keyword(s):  
Virtual Reality ◽  
Gait Analysis ◽  
Human Gait ◽  
Human Gait Analysis

scholarly journals Exploring the Development Requirements for Virtual Reality Gait Analysis

2019 ◽  
Vol 3 (2) ◽  
pp. 24
Author(s):  
Mohammed Soheeb Khan ◽  
Vassilis Charissis ◽  
Sophia Sakellariou
Keyword(s):  
Virtual Reality ◽  
Gait Analysis ◽  
Cost Effective ◽  
Rural And Remote ◽  
Physical Presence ◽  
Alternative Means ◽  
Virtual Presence ◽  
Cost Effective Alternative ◽  
Analysis System ◽  
Local Proximity

The hip joint is highly prone to traumatic and degenerative pathologies resulting in irregular locomotion. Monitoring and treatment depend on high-end technology facilities requiring physician and patient co-location, thus limiting access to specialist monitoring and treatment for populations living in rural and remote locations. Telemedicine offers an alternative means of monitoring, negating the need for patient physical presence. In addition, emerging technologies, such as virtual reality (VR) and immersive technologies, offer potential future solutions through virtual presence, where the patient and health professional can meet in a virtual environment (a virtual clinic). To this end, a prototype asynchronous telemedicine VR gait analysis system was designed, aiming to transfer a full clinical facility within the patients’ local proximity. The proposed system employs cost-effective alternative motion capture combined with the system’s immersive 3D virtual gait analysis clinic. The user interface and the tools in the application offer health professionals asynchronous, objective, and subjective analyses. This paper investigates the requirements for the design of such a system and discusses preliminary comparative data of its performance evaluation against a high-fidelity gait analysis clinical application.

scholarly journals Three-dimensional gait analysis using a virtual reality tracking system

Measurement ◽  
2021 ◽  
pp. 110627
Author(s):  
Magdalena Żuk ◽  
Magdalena Wojtków ◽  
Michał Popek ◽  
Jakub Mazur ◽  
Katarzyna Bulińska
Keyword(s):  
Virtual Reality ◽  
Gait Analysis ◽  
Tracking System ◽  
Three Dimensional

scholarly journals Evaluating the Accuracy of Virtual Reality Trackers for Computing Spatiotemporal Gait Parameters

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3325
Author(s):  
Michelangelo Guaitolini ◽  
Fitsum E. Petros ◽  
Antonio Prado ◽  
Angelo M. Sabatini ◽  
Sunil K. Agrawal
Keyword(s):  
Virtual Reality ◽  
Gait Analysis ◽  
Healthy Subjects ◽  
Stride Length ◽  
Clinical Care ◽  
Heel Strike ◽  
Mean Square ◽  
Virtual Reality System ◽  
Gait Parameters ◽  
Gait Features

Ageing, disease, and injuries result in movement defects that affect daily life. Gait analysis is a vital tool for understanding and evaluating these movement dysfunctions. In recent years, the use of virtual reality (VR) to observe motion and offer augmented clinical care has increased. Although VR-based methodologies have shown benefits in improving gait functions, their validity against more traditional methods (e.g., cameras or instrumented walkways) is yet to be established. In this work, we propose a procedure aimed at testing the accuracy and viability of a VIVE Virtual Reality system for gait analysis. Seven young healthy subjects were asked to walk along an instrumented walkway while wearing VR trackers. Heel strike (HS) and toe off (TO) events were assessed using the VIVE system and the instrumented walkway, along with stride length (SL), stride time (ST), stride width (SW), stride velocity (SV), and stance/swing percentage (STC, SWC%). Results from the VR were compared with the instrumented walkway in terms of detection offset for time events and root mean square error (RMSE) for gait features. An absolute offset between VR- and walkway-based data of (15.3 ± 12.8) ms for HS, (17.6 ± 14.8) ms for TOs and an RMSE of 2.6 cm for SW, 2.0 cm for SL, 17.4 ms for ST, 2.2 m/s for SV, and 2.1% for stance and swing percentage were obtained. Our findings show VR-based systems can accurately monitor gait while also offering new perspectives for VR augmented analysis.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

Laparoscopic Cholecystectomy

Swiss Surgery ◽  
2002 ◽  
Vol 8 (6) ◽  
pp. 250-254
Author(s):  
Vogelbach ◽  
Bogdan ◽  
Rosenthal ◽  
Pfefferkorn ◽  
Triponez
Keyword(s):  
Virtual Reality ◽  
Laparoscopic Cholecystectomy ◽  
Neue Technik

Fragestellung: Die dieser Untersuchung zugrunde liegende Frage war, ob das angewandte Ausbildungskonzept geeignet war, um am Beispiel der Einführung der laparoskopischen Cholezystektomie eine neue Operationsmethode in einer universitären Ausbildungsklinik mit einer grossen Anzahl Chirurgen zu etablieren. Patienten und Methodik: Seit Einführung der ersten laparoskopischen Cholezystektomie wurden alle Cholezystektomien während zwei Jahren (Mai 1990 bis Mai 1992) prospektiv erfasst. Ein Ausbildungskonzept wurde gewählt, bei dem jeweils ein Operateur durch einen Tutor geschult wurde und so 15 konsekutive Eingriffe durchführte, um dann die Technik einem weiteren auszubildenden Chirurgen zu instruieren. Resultate: In zwei Jahren wurden 355 Patienten cholezystektomiert. 60% der Operationen wurden laparoskopisch durchgeführt oder begonnen. 40% der Operationen wurden offen durchgeführt. In den ersten zwei Jahren konnten 13 Operateure (durchschnittlich 16 Operationen / Operateur , range 1 - 60) in die neue Technik eingeführt werden. Es traten keine schweren Komplikationen, insbesondere keine Gallenwegsverletzungen in dieser Einführungsphase auf. Diskussion: In der Literatur wird dieses Vorgehen bei der Einführungsphase seit 1992 wiederholt vorgestellt, diskutiert und empfohlen. Zwischenzeitlich gibt es Richtlinien von Fachgesellschaften und nationalen Institutionen, welche die Ausbildung zur Ausführung neuer chirurgischer Techniken reglementieren. In den letzten Jahren verlagern sich die ersten Ausbildungsschritte in Richtung Trainingskurse an skill-stations und virtual reality Trainer. Schlussfolgerung: Das beschriebene Ausbildungskonzept bewährte sich in der Einführungsphase der laparoskopischen Cholezystektomie zu Beginn der 90er-Jahre.

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