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Real-Time Web-Based Wireless Visual Guidance System for Radiotherapy

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D Lee

D Lee*, S Kim , J Palta , T Kim , Virginia Commonwealth University, Richmond, VA


SU-I-GPD-T-79 (Sunday, July 30, 2017) 3:00 PM - 6:00 PM Room: Exhibit Hall

Purpose: Describe a Web-based wireless visual guidance system that mitigates issues associated with hard-wired, audio-visual aided, patient interactive motion management systems that are cumbersome to use in routine clinical practice.

Methods: A Web-based wireless visual display duplicates an existing visual display of a respiratory-motion management system for visual guidance. The visual display of the existing system is sent to legacy Web clients over a private wireless network, thereby allowing a wireless setting for real-time visual guidance. In this study, an active-breathing-coordinator (ABC) trace was used as an input for the visual display, captured an ABC computer display and transmitted to Web clients. Virtual reality goggles require left-and-right-eye-view images for the visual display. We investigated the performance of Web-based wireless visual guidance by quantifying (1) network latency of visual displays between an ABC computer display and Web clients of a laptop, an iPad mini 2 and an iPhone 6, and (2) the frame rate of the visual display on the Web clients in frames per second (fps).

Results: The network latency of the visual display between the ABC computer and Web clients was about 100 ms, and the frame rate was 14.0 fps (laptop), 9.2 fps (iPad mini 2) and 11.2 fps (iPhone 6). In addition, the visual display for the virtual reality goggles was successfully shown on the iPhone 6. Furthermore, power/data cable-related safety issues and image artifacts were eliminated.

Conclusion: This study demonstrated that Web-based wireless visual guidance can be a promising technique for clinical motion management systems which require real-time visual display of their outputs. Based on the results of this study, our approach has the potential to reduce clutter associated with wired-systems, reduce space requirements, and extend the use of medical devices from static usage to interactive and dynamic usage in a radiotherapy treatment vault.

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