Bendriem B, Soussaline F, Campagnolo R, Verrey B, Wajnberg P, Syrota A
J Comput Assist Tomogr. 1986 Mar-Apr;10(2):287-95. doi: 10.1097/00004728-198603000-00021.
The time-of-flight information has been used in the development of a correction technique for the effects of radiation scattering in a positron emission tomography system. A two-dimensional function describing the scattered radiation distribution is added to the response of the system. A deconvolution filter that depends on parameters that were experimentally determined from measurements of a linear source located in a scattering medium is derived. The method was tested on cold spot cylindrical phantoms. The relative intensity of events from scattered radiation is significantly reduced and the contrast is thus improved. This technique does not require any additional computing time and can be included in standard reconstruction procedure.
飞行时间信息已被用于开发一种校正技术，以校正正电子发射断层扫描系统中辐射散射的影响。一个描述散射辐射分布的二维函数被添加到系统的响应中。推导了一种反卷积滤波器，该滤波器取决于通过对位于散射介质中的线性源进行测量而实验确定的参数。该方法在冷区圆柱形体模上进行了测试。来自散射辐射的事件的相对强度显著降低，从而提高了对比度。该技术不需要任何额外的计算时间，并且可以包含在标准重建程序中。
