Abstract

Info

Title:: Setup accuracy of laser system: a study based on optical positioning system

Author(s):: WANG Dafei1; HUANG Xinyang2; XU Yifen1; ZHU Guomin1; CHEN Shengdong1; GE Yun2; 1. Department of Radiotherapy, Cancer Hospital of Yixing City, Yixing 214206, China 2. School of Electronic Science and Engineering, Nanjing University, Nanjing 210046, China

Keywords:: Keywords: tumor radiotherapy optical positioning system indoor laser system setup accuracy

Abstract:: Abstract: Objective To evaluate the setup accuracy of indoor laser system in radiotherapy of tumors at different sites by optical positioning system (OPS). Methods A total of 404 patients with tumors of head and neck, chest, abdomen and pelvic who were treated with conventional radiotherapy were enrolled in the study to verify the instability of indoor laser system for patient setup. The patients positions were adjusted by indoor laser system, and meanwhile the setup errors displaying in OPS in X (left-right), Y (anterior-posterior) and Z (superior-inferior) axes were recorded. Results and Conclusion The setup accuracy of indoor laser system is various in patients with tumors at different sites, and the results reveal that indoor laser system has a lower setup accuracy and poor stability, especially for chest tumors. It is recommended to perform radiotherapy setup directly using OPS.