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X线成像技术经历了100多年的漫长历程,这其中包含了X线穿过人体信息的种种转换——从单独X线胶片到增感屏暗盒系统(中、高、感绿增感屏)——从影像增强器加电荷耦合器件(CCD)到CR(计算机摄影)系统。这些中间转换无论哪种方法、哪种方式都很大程度地损失了 X线穿过人体的有用信息。当今最先进的非晶硅X线平板探测器数字成像系统有效地利用穿过人体的X线信息,实现了X线成像的本质飞越。 1 非晶硅X线平板探测器的主要结构和原理 1.1 探测器主要由三层结构组成:表面一层为碘化铯闪烁体材料;第二层是以非晶硅为材料的光电二极管电路; 最底层TFT(大面积薄膜晶体管阵列)电荷信号读出电路
X-ray imaging has undergone a long history of more than 100 years. This includes the conversion of the X-ray through the human body information - from X-ray film to the sensory screen cassette system (medium, high, green sensitive screen) - From image intensifier plus charge-coupled device (CCD) to CR (computer photography) system. Either way, these methods of intermediate conversion greatly lose the useful information of the X-ray through the human body. Today’s most advanced amorphous silicon X-ray flat panel detector digital imaging system to effectively use the X-ray information through the body to achieve the nature of X-ray imaging over. 1 amorphous silicon X-ray flat panel detector main structure and principle 1.1 detector consists of three layers: the first layer of cesium iodide scintillator material; the second layer is based on amorphous silicon photodiode circuit; The bottommost TFT (Large Area Thin Film Transistor Array) charge signal readout circuit