摘要
介绍了一种放疗加速器束流剂量实时成像系统,采用数字化脉冲X射线成像技术获取放疗加速器的束流强度分布图像,并利用数字图像处理技术生成实时3D剂量图。利用该系统可以实时、直观地获得加速器束流强度的相对分布曲面,给出任意剖面的束流强度分布曲线和FWHM、半影、峰值、对称度、均整度等参数。利用本系统的实时性,在国内首次实现了放疗加速器动态楔形剂量分布和束流过渡过程的测量。给出了系统配置和实测的放疗加速器束流强度分布图像。
This paper describes a realtime beam profile imaging system for actinotheraphy accelerator. With the flash Xray imager and the technique of digital image processing, a realtime 3demension dosage image is created from the intensity profile of the accelerator beam in real time. This system helps to obtain all the physical characters of the beam in any section plane, such as FWHM, penumbra, peak value, symmetry and homogeneity. This system has been used to acquire a 3dimension dosage distribution of dynamic wedge modulator and the transient process of beam dosage. The system configure and the tested beam profile images are also presented.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2003年第6期554-556,562,共4页
Nuclear Electronics & Detection Technology
