Virtual Reality-based Research Articles

3 Impacts of Intrafraction Virtual Reality-Based Environment Modification on Procedural Anxiety, Heart Rate, and External Beam Radiotherapy Experience

3 Impacts of Intrafraction Virtual Reality-Based Environment Modification on Procedural Anxiety, Heart Rate, and External Beam Radiotherapy Experience

Towards engineering a portable platform for laparoscopic pre-training in virtual reality with haptic feedback

BackgroundLaparoscopic surgery is a surgical technique in which special instruments are inserted through small incision holes inside the body. For some time, efforts have been made to improve surgical pretraining through practical exercises on abstracted and reduced models. MethodsThe authors strive for a portable, easy to use and cost-effective Virtual Reality-based (VR) laparoscopic pre-training platform and therefore address the question of how such a system has to be designed to achieve the quality of today's gold standard using real tissue specimens. Current VR controllers are limited regarding haptic feedback. Since haptic feedback is necessary or at least beneficial for laparoscopic surgery training, the platform to be developed consists of a newly designed prototype laparoscopic VR controller with haptic feedback, a commercially available head-mounted display, a VR environment for simulating a laparoscopic surgery, and a training concept. ResultsTo take full advantage of benefits such as repeatability and cost-effectiveness of VR-based training, the system shall not require a tissue sample for haptic feedback. It is currently calculated and visually displayed to the user in the VR environment. On the prototype controller, a first axis was provided with perceptible feedback for test purposes. Two of the prototype VR controllers can be combined to simulate a typical both-handed use case, e.g., laparoscopic suturing. A Unitybased VR prototype allows the execution of simple standard pre-trainings. ConclusionsThe first prototype enables full operation of a virtual laparoscopic instrument in VR. In addition, the simulation can compute simple interaction forces. Major challenges lie in a realistic real-time tissue simulation and calculation of forces for the haptic feedback. Mechanical weaknesses were identified in the first hardware prototype, which will be improved in subsequent versions. All degrees of freedom of the controller are to be provided with haptic feedback. To make forces tangible in the simulation, characteristic values need to be determined using real tissue samples. The system has yet to be validated by cross-comparing real and VR haptics with surgeons.

Best Abstract: Innovations in Peripheral Nerve Surgery: Multimodal Virtual Reality-Based Individualized Preoperative Planning in Complex Peripheral Nerve Surgery

Best Abstract: Innovations in Peripheral Nerve Surgery: Multimodal Virtual Reality-Based Individualized Preoperative Planning in Complex Peripheral Nerve Surgery

The Effect of Multimodal Intervention through Virtual Reality-Based Immersion Program on Cognitive Function and Brain activity in Patients with Mild Cognitive Impairment

The Effect of Multimodal Intervention through Virtual Reality-Based Immersion Program on Cognitive Function and Brain activity in Patients with Mild Cognitive Impairment

Learning promotion of physiotherapy in neurological diseases: Design and application of a virtual reality-based game.

INTRODUCTION:The virtual reality-based (VR) game can be considered as a new approach to education and to enhance the skills of health-care students.AIMS:The purposes of this research were to design a VR game and to apply it to teach physiotherapy in neurological diseases.METHODOLOGY:In this study, at first, a VR game was designed for upper limb rehabilitation in brain-injured patients based on the literature and the opinions of physiotherapy experts and game designers. Then, the designed game was used for teaching physiotherapy in neurological diseases. Thereafter, the opinions of 31 undergraduate students about the teaching session were evaluated by two anonymous questionnaires. Data analysis was performed using descriptive statistics through SPSS (version 19).RESULTS:The VR game developed under expert supervision. The evaluation showed that the median score for students’ perception of learning was 3.11. The median scores of questions related to the “facilitating level of virtual reality” and “student satisfaction” were 8.66 and 9, respectively. The analysis of students’ responses to open-ended questions highlighted the therapeutic aspect of the game compared to its educational aspect.CONCLUSIONS:Application of VR games in education can enhance the students’ perception of learning. Furthermore, it can provide a better understanding of physiotherapy in patients with neurological diseases as well as the satisfaction of students. However, the survey indicated that the good results of this teaching method are due to the use of VR for guiding the patient's movements.

EFEITO DA TERAPIA COM REALIDADE VIRTUAL NO EQUILÍBRIO DINÂMICO DE INDIVÍDUOS PÓS-ACIDENTE VASCULAR ENCEFÁLICO

The aim of this study was to analyze the effect of virtual reality-based (VR) therapy on balance training of patients after stroke. 10 hemiparetic participants received twelve individual physical therapy sessions using the VR therapeutic, through Nintendo Wii® Fit Plus and Wii Sports Resort™. The analysis revealed that the Dynamic Gait Index (DGI) instrument, responsible for evaluating the dynamic balance, obtained significant difference (p=0.0085) between the basal (17.30±3.59) and final (20.30±2.94) evaluation. The Penguin Slide game had no significance between the scores (p=0.918), but there was a moderate correlation between the DGI instrument (r=0.662; p=0.037). This study obtained favorable results related to dynamic balance and also suggests that VR therapy as in general influenced the improvement of dynamic balance in individuals with hemiparesis after stroke.

Virtual Reality-Based Product Representations in Conjoint Analysis

Innovations are an important factor for companies to build and sustain a competitive advantage. Even though companies generate up to 51 % of their income with products and services launched less than three years ago, the failure rate of new product development is still at around 90 %. One way to reduce the failure rate of innovations is to conduct customers’ preference measurements in the early stages of new product development processes. However, customers often display a substantial amount of uncertainty when having to evaluate highly innovative products as they may not be able to grasp its features and functionalities. Therefore, some empirical studies have already compared different presentation forms in a conjoint setting. These studies aim to optimize preference measurement results by exposing respondents to state-of-the-art product descriptions in the new product development process. Based on a quantitative-empirical analysis, this thesis contributes to this research vein by integrating virtual reality-based (VR) product representations within a conjoint setting for the measurement of preferences in the development process of a technically complex innovation. The results of this study point out that VR offers the potential for early customer integration within the new product development process.