Cho P S, Johnson R H, Griffin T W
Department of Radiation Oncology, University of Washington School of Medicine, Seattle 98195-6043, USA.
Phys Med Biol. 1995 Nov;40(11):1863-83. doi: 10.1088/0031-9155/40/11/007.
Clinical implementation of cone-beam tomography has been hampered by the lack of two-dimensional electronic x-ray detectors that can encompass the full width of the body. We encountered the undersized detector problem in our development of a cone-beam CT system for radiotherapy applications. In order to mitigate the problem, we developed an algorithm which permits an increased reconstruction volume to be imaged using a detector of a given size. We describe the algorithm and report on its implementation using a radiotherapy simulator configured with a digital fluorography unit.
锥形束断层扫描的临床应用因缺乏能覆盖身体全宽的二维电子X射线探测器而受到阻碍。我们在开发用于放射治疗的锥形束CT系统时遇到了探测器尺寸过小的问题。为了缓解这一问题，我们开发了一种算法，该算法允许使用给定尺寸的探测器对更大的重建体积进行成像。我们描述了该算法，并报告了其在配置有数字荧光摄影装置的放射治疗模拟器上的实施情况。
