Research on the Acceptance and Commissioning of
Optical Surface Imaging with AlignRT System
WANG Meijiao1, LI Kaixuan2, YAO Kaining1, DU Yi1, LI Junyu1, ZHOU Shun1, ZHANG Jian1, YUE Haizhen1
1. Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiation Oncology,
Peking University Cancer Hospital & Institute, Beijing 100142, China;
2. Department of Outpatient, People’s Liberation Army Unit 93199, Harbin Heilongjiang 150001, China
Abstract：Objective To evaluate the acceptance and commissioning performance of the AlignRT system, ensuring the accuracy and
reliability of patient setup and real-time motion monitoring during treatment. Methods With reference to the relevant national and
international standards, system configuration, system calibration, performance test and complete end-to-end test of AlignRT were
evaluated. Results All indicators met the relevant standards, the results showed that: a. There was 0.5 mm drift in y and z direction
at the beginning of 800 s, and gradually stabilized, while the thermal stability in the other four directions was stable, and the drift
was not obvious; b. The maximum deviation of the pod occlusion was only 0.19 mm; c. The ambient lighting was stable, and the
change of 6-dimensional direction was 0; d. The relative shift test had the largest deviation in y direction, which was only 0.03 mm;
e. There was little dependence on the angle of the treatment bed, and the maximum deviation of Roll direction was 0.3°only at 90°;
f. For multicenter treatment plan, the monitoring accuracy of AlignRT was in the sub-millimeter level. Conclusion The performance
test results of the AlignRT system showed that it can ensure the accuracy of patient setup and real-time motion monitoring during
treatment. For system calibration, plate calibration and cube calibration are recommended at least once a month, and daily quality
control should be done to ensure that the deviation between AlignRT and linear accelerator radiation isocenter is minimized. Based
on clinical needs, it is recommended to complete an end-to-end test of the SRS plan to ensure that the accuracy of the optical surface
monitoring system is within the threshold limit.
王美娇1，李凯旋2，姚凯宁1，杜乙1，李俊禹1，周舜1，张健1，岳海振1. AlignRT系统光学体表的验收和服役测试[J]. 中国医疗设备, 2022, 37(3): 18-22.
WANG Meijiao1, LI Kaixuan2, YAO Kaining1, DU Yi1, LI Junyu1, ZHOU Shun1, ZHANG Jian1, YUE Haizhen1. Research on the Acceptance and Commissioning of
Optical Surface Imaging with AlignRT System. China Medical Devices, 2022, 37(3): 18-22.
