TY - JOUR T1 - Development and Accuracy Evaluation of Augmented Reality-based Patient Positioning System in Radiotherapy: A Phantom Study JF - In Vivo JO - In Vivo SP - 2081 LP - 2087 DO - 10.21873/invivo.12477 VL - 35 IS - 4 AU - KAZUO TARUTANI AU - HARUYUKI TAKAKI AU - MASATAKA IGETA AU - MASAYUKI FUJIWARA AU - AYAKO OKAMURA AU - FUTO HORIO AU - YUKI TOUDOU AU - SATOSHI NAKAJIMA AU - KAZUFUMI KAGAWA AU - MASAO TANOOKA AU - KOICHIRO YAMAKADO Y1 - 2021/07/01 UR - http://iv.iiarjournals.org/content/35/4/2081.abstract N2 - 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. ER -