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CT(Computed Tomography),即电子计算机断层扫描,它是利用精确准直的X线束与灵敏度极高的探测器一同围绕人体的某一部位做一个接一个的断面扫描,每次扫描过程中由探测器接收穿过人体后的衰减X线信息,再由快速模/数(A/D)转换器将模拟量转换成数字量,后经电子计算机高速计算,得出该层面各点的X线吸收系数值,用这些数据组成图像的矩阵。从20世纪70年代至今,CT在临床
CT (Computed Tomography), that is, computed tomography, which is the use of precise collimation of the X-ray beam and the detector with high sensitivity together around a part of the human body to do one after another section of the scan, each scan by the detection The device receives the attenuation X-ray information after passing through the human body, and then converts the analog quantity into a digital quantity by a fast A / D converter, and then calculates the X-ray absorption at each point of the layer by a high-speed electronic computer Coefficient values, using these data to form a matrix of images. From the 1970s to the present, CT is in clinical practice