Simulation studies of dual-energy x-ray absorptiometry.
Simulation studies of dual-energy x-ray absorptiometry.
复制标题
双能X射线吸收法的模拟研究。
DOI：
10.1118/1.596405
复制
发表时间：
1989
期刊：
影响因子：
3.8
通讯作者：
Steven W. Smith
中科院分区：
文献类型：
--
作者：
James A. Sorenson;Peter R. Duke;Steven W. Smith
计算机模拟被用来预测双能X射线吸收法的性能特性。详细分析了K边缘滤波技术，并在输出强度、精度、患者剂量、图像对比度、射束硬化和骨髓脂肪效应方面与153Gd源进行了比较。对文献中已报道的两种双千伏技术进行了类似的分析。仿真结果表明，K边滤波技术，或双千伏技术与K边滤波相结合，可以提供与153Gd系统相同或超过的性能。具有传统(铝或铜)过滤的(70/140)双千伏技术在源输出强度方面也有优势，但在患者剂量和射束硬化效应方面比K边缘技术和153Gd低2-3倍。
Computer simulations were performed to predict the performance characteristics of dual-energy x-ray absorptiometry. K-edge filter techniques were analyzed in detail and compared to 153Gd sources in terms of output intensity, precision, patient dose, image contrast, beam hardening, and marrow fat effects. Similar analyses were performed for two dual-kV techniques that have been reported in the literature. The simulations indicate that K-edge filter techniques, or a dual-kV technique combined with K-edge filtering, can provide performance capabilities that equal or exceed those achievable with 153Gd systems. A (70/140) dual-kV technique with conventional (Al or Cu) filtration also has advantages in terms of source output intensity, but is 2-3 X inferior to the K-edge techniques and 153Gd in terms of patient dose and beam-hardening effects.