Statistical analysis of positioning errors based on OPS radiotherapy real-time positioning early warning system(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2021年第12期
- Page:
- 1477-1481
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Statistical analysis of positioning errors based on OPS radiotherapy real-time positioning early warning system
- Author(s):
- WANG Yuhui1; WANG Dongyan2; ZHOU Jundong2; WU Chuanfeng2; GE Yun1; CHEN Ying1; HUANG Xiaolin1; LI Weifeng1
- 1. School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China 2. Department of Radiotherapy, Suzhou Municipal Hospital (East District), Suzhou 215000, China
- Keywords:
- Keywords: optical positioning system radiotherapy positioning error statistics real-time early warning
- PACS:
- R318；R811.1
- DOI:
- DOI:10.3969/j.issn.1005-202X.2021.12.005
- Abstract:
- Abstract: Objective To analyze and monitor the errors related to equipment performance and posture by OPS radiotherapy real-time positioning early warning system based on the massive data accumulated by radiotherapy positioning, thereby guiding the positioning in real time. Methods The positioning data in the study were selected from 264 cases of abdominal cancer, 195 cases of head and neck cancer and 186 cases of head cancer. A normalization conversion system was build to quantify and label different positioning results and differences produced by different positioning methods, and then to convert the existing positioning results to a coordinate system. Finally, based on the massive data generated by radiotherapy positioning, an early warning system was developed for the real-time monitoring of 5 kinds of positioning errors which were caused by isocenter registration, camera movement, laser line deviation, body membrane deformation or CBCT mechanical problems. Results The OPS radiotherapy real-time positioning early warning system could monitor the positioning data in real time. The numbers of cases with 5 kinds of positioning errors were 5, 1, 11, 4 and 7 among 264 cases of abdominal cases, 13, 4, 40, 0 and 27 among 195 cases of head and neck cancer, and 10, 3, 25, 0 and 19 among 186 cases of head cancer. Conclusion OPS radiotherapy real-time positioning early warning system can provide more accurate real-time early warning of the quality and accuracy of the positioning. When there is a large positioning error, the system can quickly alarm, point out the problems existing in the positioning in time, and remind and correct it immediately.
Last Update: 2021-12-24