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Development and Accuracy Evaluation of Augmented Reality-based Patient Positioning System in Radiotherapy: A Phantom
Kazuo Tarutani1,2, Haruyuki Takaki3, Masataka Igeta4
1Department of Radiology, Hyogo College of Medicine, Hyogo, Japan.
In Vivo (Athens, Greece)
|June 28, 2021
Summary
Augmented reality (AR) patient positioning in radiotherapy is feasible, showing accuracy comparable to laser systems. However, AR positioning requires significantly more setup time than conventional methods.
Area of Science:
- Medical Physics
- Radiotherapy Technology
- Image-Guided Therapy
Background:
- Patient positioning is critical for accurate radiotherapy delivery.
- Conventional laser-based systems have limitations in precision and visualization.
- Augmented reality (AR) offers potential for improved 3D visualization in medical applications.
Purpose of the Study:
- To develop and evaluate the accuracy of an augmented reality (AR)-based patient positioning system for radiotherapy.
- To compare the positioning accuracy and setup time of AR systems with conventional laser-based methods.
Main Methods:
- Developed AR head-mounted displays (AR-HMDs) to superimpose 3D images from DICOM data.
- Evaluated the feasibility of AR-based patient positioning using a pelvic phantom.
- Compared setup errors (translational and rotational) between AR and laser-based positioning.
Main Results:
- AR-based positioning was feasible for a pelvic phantom.
- Positioning errors with AR were comparable to laser-based systems across all axes and angles.
- AR-based positioning took significantly longer (171.0 s) compared to laser-based positioning (47.5 s).
Conclusions:
- AR-based patient positioning is a feasible technology for radiotherapy.
- AR systems demonstrate comparable accuracy to conventional laser positioning.
- A significant drawback of current AR systems is the increased setup time required.
