二维半导体面阵列实时剂量验证系统的研制及应用

调强放疗(IMRT)是放疗技术的发展方向。为实现精确放疗的目标和严格的射线质量控制,以及技术安全保证,自主研发的二维半导体面阵列剂量实时验证测量系统,(TQ-2000B剂量分布图检测仪)该系统由445个半导体探测器按面阵列栅格精确排列,主要用于放疗射线质量控制:加速器QAI、MRT的TPS实时验证。通过实测的等剂量图、剂量值与相同条件下TPS计算的结果以及剂量胶片测量的结果进行比较,从而实现对调强放疗TPS实时验证。同时还介绍了它在加速器QA方面部分项目的测试应用。二维半导体面阵列剂量实时验证测量系统的研制成功,填补了国内空白,其主要技术指标和性能达到了国外同类产品的先进水平。

Development and application of dose distribution real-time testing and verification with 2D arrays of semiconductor system

Intensity-modulated radiotherapy(IMRT) is a new development direction of radiotherapy.To achieve precise radiotherapy and improve treatment efficacy and technical security guarantees,the radiotherapy equipment such as accelerator must be strict in quality control and quality assurance.This Paper presented the independent research and development of TQ-2000B dose distributions measurement and verification system.The TQ-2000B system contained 445 diode detectors arranged in a precise grid,associated circuit and supporting software,which is used in quality control of radiotherapy,such as accelerator QA,TPS of IMRT real-time verification.Measured dose distribution results could compare with dose-films results and TPS output results in the same condition.The results indicate the TQ-2000B system is the ideal device of real-time verification.Meanwhile it can be broadly used in a conventional radiotherapy,accelerator QA.The successful development and application of this system,provide a clinically security assurances in radiotherapy in our country.