Implementation of a visual feedback system for motion management during radiation therapy

Area of Science:

• Medical Physics
• Radiotherapy Technology
• Image Guidance

Background:

• Motion management is critical in radiotherapy for accurate dose delivery.
• Real-time patient feedback systems can enhance adherence to breathing protocols.
• Integrating commercial components offers a cost-effective solution for advanced radiotherapy techniques.

Purpose of the Study:

• To describe the assembly and implementation of an in-house video goggles feedback system.
• To detail equipment, assembly, patient setup, and user settings for the system.
• To share experience with a novel video feedback system for radiotherapy.

Main Methods:

• Assembled a system using commercially available goggles, converters (RJ45 to DVI, DVI to HDMI), and network/extender cables.
• Integrated the video coaching system with CT simulator and Varian True Beam linear accelerator.
• Incorporated respiratory motion management (RPM) system for enhanced coaching.

Main Results:

• The video feedback system has been in clinical use since August 2017, treating 13 patients over ~150 fractions.
• Patient coaching for Deep Inspiration Breath Hold (DIBH) using the goggles was satisfactory.
• Patients effectively regulated their breathing cycles, leading to improved treatment accuracy and efficiency.

Conclusions:

• Successfully implemented an in-house video feedback system for motion management in radiotherapy.
• The system is effective in both CT simulation and linear accelerator treatment delivery.
• This approach enhances patient cooperation and optimizes radiotherapy outcomes.