随着医学影像技术的飞速发展, 影像检查的范围不断扩大,各种影像设备的检查领域相互渗透、重叠。而问世于20世纪70年代中期的X-射线CT扫描机以其安全、高效的检查方式和高的空间、密度分辨率的图像在多种影像设备中始终处于主导地位。20世纪80年代中期以来,新技术、新材料及数字图像处理技术不断 With the rapid development of medical imaging technology, the scope of image examination is continuously expanding, and the examination fields of various imaging devices are mutually infiltrated and overlapped. The advent of X-ray CT scanners in the mid-1970s, with their safe and efficient inspection methods and high spatial and density resolution images, has been dominating in a variety of imaging devices. Since the mid-1980s, new technologies, new materials and digital image processing technologies have continued