微型X射线数字成像系统研究

X射线数字成像检测与诊断技术是X射线检测的发展趋势，微型X射线数字成像系统采用X射线敏感CCD面阵探测器作为射线探测元件，具有体积小、分辨率高、实时性好的特点。本文研制了基于X射线敏感CCD的微型X射线数字成像系统，介绍了整个系统的组成，阐述了X射线敏感CCD的工作原理，选定了系统采用的X射线敏感CCD，设计了CCD探测器的驱动电路、模数转化电路、数据采集与通讯电路、图像获取及处理软件等。该系统采用USB2.0接口与计算机进行通讯，直接采用USB接口电源供电，无需外部电源，结构简单。分辨率测试表明，该系统的分辨率>10lp/mm。

Research on a Compact Digital X-ray Imaging System

Digital X-ray imaging inspection technology is the developing trend of X-ray inspection, the compact digital X-ray imaging system，which adopts X-ray sensitive CCD as detective device, has the characteristics of small volumn, high resolution, good real-time character. This paper introduces the development of the compact digital X-ray imaging system based on X-ray sensitive CCD, describes the working principle of X-ray sensitive CCD. According to the selected CCD, dirver, A/D, data acquistion and communication curcuits are designed and manufactured. The system communicates with computer through USB2.0 interface, which supplies power for the system, no additional power supply makes it have simple constructions. The resolution testing results instruct that the resolution of this imaging system is higer than 10lp/mm.