Kazuo Tarutani1,2, Haruyuki Takaki3, Masataka Igeta4, Masayuki Fujiwara1, Ayako Okamura2, Futo Horio5, Yuki Toudou2, Satoshi Nakajima2, Kazufumi Kagawa2, Masao Tanooka6, Koichiro Yamakado1. 1. Department of Radiology, Hyogo College of Medicine, Hyogo, Japan. 2. Japan Organization of Occupational Health and Safety Kansai Rousai Hospital, Hyogo, Japan. 3. Department of Radiology, Hyogo College of Medicine, Hyogo, Japan; takakiharuyuki@gmail.com. 4. Department of Biostatistics, Hyogo College of Medicine, Hyogo, Japan. 5. Kobe Digital Labo Incorporated, Hyogo, Japan. 6. Department of Radiotherapy, Takarazuka City Hospital, Hyogo, Japan.
Abstract
BACKGROUND/AIM: To develop and evaluate the accuracy of augmented reality (AR)-based patient positioning systems in radiotherapy. MATERIALS AND METHODS: AR head-mounted displays (AR-HMDs), which virtually superimpose a three-dimensional (3D) image generated by the digital imaging and communications in medicine (DICOM) data, have been developed. The AR-based positioning feasibility was evaluated. Then, the setup errors of three translational axes directions and rotation angles between the AR and the conventional laser-based positioning were compared. RESULTS: The AR-based pelvic phantom positioning was feasible. The setup errors of AR-based positioning were comparable to laser-based positioning in all translational axis directions and rotation angles. The time necessary for AR-based positioning was significantly longer than that for laser-based positioning (171.0 s vs. 47.5 s, p<0.001). CONCLUSION: AR-based positioning for radiotherapy was feasible, and showed comparable positioning errors to those of conventional line-based positioning; however, a markedly longer setup time was necessary.
BACKGROUND/AIM: To develop and evaluate the accuracy of augmented reality (AR)-based patient positioning systems in radiotherapy. MATERIALS AND METHODS: AR head-mounted displays (AR-HMDs), which virtually superimpose a three-dimensional (3D) image generated by the digital imaging and communications in medicine (DICOM) data, have been developed. The AR-based positioning feasibility was evaluated. Then, the setup errors of three translational axes directions and rotation angles between the AR and the conventional laser-based positioning were compared. RESULTS: The AR-based pelvic phantom positioning was feasible. The setup errors of AR-based positioning were comparable to laser-based positioning in all translational axis directions and rotation angles. The time necessary for AR-based positioning was significantly longer than that for laser-based positioning (171.0 s vs. 47.5 s, p<0.001). CONCLUSION: AR-based positioning for radiotherapy was feasible, and showed comparable positioning errors to those of conventional line-based positioning; however, a markedly longer setup time was necessary.