Performance Evaluation of Virtual Laser-Based Surface-Guided Radiation Therapy Setup System Using Humanoid Head Phantom
Performance Evaluation of Virtual Laser-Based Surface-Guided Radiation Therapy Setup System Using Humanoid Head Phantom
We believe that the SGRT system, with the function of the virtual laser, can provide accurate alignment information of a large area and the area of interest set before treatment, which can provide accuracy of treatment and stable treatment setup...
We aimed to verify patient setup accuracy using a combination of virtual laser-based SGRT systems (LUNA 3D, LAP, Germany). The experiments were divided into (1) skin-surface guidance with virtual laser and (2) mold-surface guidance with optical laser. The humanoid head phantom setups were analyzed into vertical (mm), lateral (mm), longitudinal (mm), and rotational (yaw in degree). In the virtual laser-based SGRT results, the displacement in the lateral direction is less than 0.5 mm, and the displacement in the longitudinal direction is more pronounced. In comparison, the vertical direction shows a difference of about 1 mm. The mold-based optical laser system showed vertical and longitudinal direction errors up to 2 mm. The SGRT system with the virtual laser can provide accurate alignment information of a large area and the area of interest set before treatment, providing accuracy of treatment and stable treatment setup.
Keywords: SGRT, virtual laser, optical laser, head phantom
Authors
Jeong-Woo Lee1,2, Byoung-Moon Park1, Yong-Ki Bae1, Min-Young Kang1 and Semie Hong1,2
1Department of Radiation Oncology, Konkuk University Medical Center, Seoul, Korea
2Department of Medical Physics Convergence, Graduate School of Engineering, Konkuk University, Seoul, Korea
ICCR 2024 XXth International Conference on the use of Computers in Radiation therapy
Conference Proceedings, 8-11 July 2024, Lyon France 20th edition, pp. 661-663