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医用诊断计算机断层摄影装置（CT）在1972年引入临床实践，30年间先后发展了从头颅到螺旋CT和超高速CT等五代产品。从而能再现人体横断剖面的高质量影像，在X线成像领域引发了一场革命。此技术在低对比探测性方面的改善使得软组织的可视性提高，但同时也带来了相对较高的辐射吸
Medical diagnostic computerized tomography (CT) was introduced into clinical practice in 1972. Over the past 30 years, five generations of products ranging from skull to spiral CT and ultra-high speed CT have been developed. Enabling the reproduction of high quality images of the human body in cross-section, triggering a revolution in the field of X-ray imaging. The improvements in low contrast detectivity of this technique result in improved soft tissue visibility, but at the same time bring a relatively high radiation absorption