Study of establishment of evaluation index system for stability of linac equipment
10.3760/cma.j.cn113030-20210124-00042
- VernacularTitle:直线加速器设备稳定性评价指标体系建构研究
- Author:
Jinhui YUAN
1
;
Qingsong LI
;
Yan SHEN
Author Information
1. 浙江大学医学院附属第二医院放疗科，杭州 310009
- Keywords:
Linear accelerator;
Delphi;
Index system
- From:
Chinese Journal of Radiation Oncology
2022;31(2):182-186
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To build an evaluation index system for linac stability and establish a scientific, systematic and objective evaluation standard for the stability of linac equipment.Methods:Based on the Delphi and AHP methods, a three-level index system for the stability of linac equipment was established, and the correlation coefficients and weights were calculated using Microsoft Excel 2007 and SPSS 16.0.Results:The enthusiasm of experts in two rounds was 85%(17/20) and 92%(23/25), the authority coefficients were 0.79 and 0.87, and the expert Kendall coordination coefficients were 0.957(first-level index, P<0.05), 0.637(second-level index, P<0.05) and 0.527(third-level index, P<0.05), respectively. Finally, a three-level index system covering 2 first-level indicators of mechanical treatment system and accessory system, 9 second-level indicators and 32 third-level indicators was established. The CVs of all levels of indicators were less than 0.25 and passed the consistency test. Conclusion:The evaluation index system for linac equipment stability has good scientificity, operability and versatility, which can provide theoretical and quantitative reference for linac stability evaluation and equipment purchase.
