众所周知,X 线计算机化断层术(X-CT)对医学影像学作出了极大的贡献。目前它还继续向着高性能、动态显示、多功能、多维空间重建一代代地向前发展。但由于造价昂贵,其应用有一定的局限性。多年来,国外一些医疗单位和大学在 X-CT 的普及和廉价方面作了初步探索。本文拟简介国外在廉价CT 方面的一般情况,以供借鉴。 As we all know, X-ray computed tomography (X-CT) made a great contribution to medical imaging. It is also continuing to move forward with generations of high-performance, dynamic display, multi-purpose, and multi-dimensional space. However, due to the high cost, its application has some limitations. Over the years, some foreign medical units and universities have made preliminary exploration in the popularization and cheapness of X-CT. This article will outline the general situation of foreign countries in cheap CT, for reference.