Application of scripts in Pinnacle TPS for collision protection in linac-based radiotherapy(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2020年第6期
- Page:
- 666-670
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Application of scripts in Pinnacle TPS for collision protection in linac-based radiotherapy
- Author(s):
- MIAO Junjie; FU Guishan; NIU Chuanmeng; LIU Zhiqiang; TIAN Yuan; ZHANG Ke; LI Minghui; DAI Jianrong
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
- Keywords:
- Keywords: linear accelerator radiotherapy treatment plan collision protection scripting
- PACS:
- R312；R815.6
- DOI:
- DOI:10.3969/j.issn.1005-202X.2020.06.002
- Abstract:
- Abstract: Objective To realize the collision detection during linac-based radiotherapy by applying the scripts of Pinnacle treatment planning system (TPS) in treatment planning, thereby improving the reliability of radiotherapy planning and ensuring the safety of treatment. Methods According to the geometry information of the gantry of C-arm accelerator, patients CT images and treatment couch, the minimum safety distance between the treatment center and rotating gantry was determined. Pinnacle TPS was used to design scripts. The motion trajectory of the critical safe position during gantry rotation was simulated according to the field center of the radiotherapy plan. Then the motion trajectory was imported into Pinnacle TPS in the form of region of interest. Finally, based on the superimposed image of CT images and ROI, it would be determined whether there was a risk of collision between accelerator gantry and treatment couch or the patient. Results According to the setting parameters such as patient positioning and treatment center, the scripts could generate the auxiliary ROI structure automatically and import it back into the planning system. The auxiliary ROI track was showed as a circular structure on the cross section of the CT image. During radiotherapy planning, the auxiliary ROI was generated quickly (within 2 s) after a single mouse click. On the superimposed image of ROI and CT images, it could be clearly and intuitively determined whether there was a risk of collision in the current treatment plan, thus avoiding collisions when the plan was delivered. Conclusion Implementing the collision detection in Pinnacle TPS is proved to be clinically feasible. During the stage of treatment planning, it is possible to determine whether there is a risk of collision in current radiotherapy plan by the proposed method, thereby avoiding the time delay caused by the repeat of treatment planning and ensuring the safety of treatment.
Last Update: 2020-07-03