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一、绪言 X线断层扫描仪(CT=Computed Tomography)是1979年发明的一种新型诊断装置。CT和一般的X线断层术不同,它能对人体任一断面进行扫描显示。根据正常器官组织与病变组织对X线吸收程度的差异,辨
I. Introduction X-ray computed tomography (CT = Computed Tomography) was invented in 1979 as a new diagnostic device. CT and the general X-ray tomography different, it can scan the body of any section display. According to normal organs and lesions of the X-ray absorption of the differences, identified