Mechanical parameter measurement and analysis system for a medical linear accelerator(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2019年第5期
- Page:
- 585-589
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- Mechanical parameter measurement and analysis system for a medical linear accelerator
- Author(s):
- FANG Chuan1; GE Yun1; HUANG Xiaolin1; CHEN Ying1; JIN Jianhua2; CAI Jing2; CHU Kaiyue2
- 1. School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China; 2. Department of Radiotherapy, Nantong Tumor Hospital, Nantong 226361, China
- Keywords:
- ; Keywords: medical linear accelerator; mechanical parameter; binocular optical measurement kit; analysis report
- PACS:
- R318
- DOI:
- DOI:10.3969/j.issn.1005-202X.2019.05.018
- Abstract:
- Abstract: Objective To design and implement a mechanical parameter measurement system that can measure and quantitatively analyze the isocenter and other mechanical parameters of medical linear accelerators. Methods The hardware of the system adopted binocular optical measurement kit. A positioning ball was attached to the components of the accelerator. The binocular camera output the spatial coordinates of the positioning ball at a frequency of 20 Hz. According to the coordinates, the fitting of three-dimensional model of the accelerator and the movement parameters of each component was updated with software, thereby realizing the motion tracking on medical linear accelerators. When the measurement was completed, the software output the measurement analysis report which included the mechanical motion parameters of various components of the accelerator and the characteristic variables which could reflect the performance. The measurement accuracy was up to 0.5 mm. Results After the system was established, multi-measurement and analysis were conducted on two medical linear accelerators that had been working for different hours in two hospitals. The accelerators were separately measured and analyzed to obtain the isocenter errors, mechanical motion parameters of gantry and treatment couch and their statistics, repeatability errors of gantry and treatment couch, etc. Conclusion The proposed system can effectively assist technicians and physicists in the maintenance of accelerators and provide guidance for daily inspection and quality control of medical linear accelerators.
Last Update: 2019-05-23