Noninvasive digital energy subtraction angiography with a channeling-radiation x-ray source.
Noninvasive digital energy subtraction angiography with a channeling-radiation x-ray source.
复制标题
使用通道辐射 X 射线源进行无创数字能量减影血管造影。
DOI：
10.1118/1.597116
复制
发表时间：
1993
期刊：
影响因子：
3.8
通讯作者：
Rothbart,GB
中科院分区：
文献类型：
--
作者：
Gary,CK;Piestrup,MA;Boyers,DG;Pincus,CI;Pantell,RH;Rothbart,GB
闪烁辐射可以为数字能量减影血管造影（德萨）提供可行的来源。使用6 mA 100 ms 20 MeV电子束脉冲和金刚石沟道晶体作为X射线源，可以实现0.5 mm×0.5 mm分辨率的6.2信噪比（SNR）。本文研究了通道辐射德萨造影剂的选择和通道辐射X射线源的参数，以开发通道辐射德萨成像系统。讨论了双能量峰值的产生、最大可用X射线通量、区域曝光的优点、镶嵌布拉格晶体滤波器减少患者剂量的必要性、准单色X射线源峰值的最佳能量分离以及骨信号的减少，从而得出了通道辐射成像系统的估计SNR和图像分辨率。文中还讨论了计算图象质量的计算机分析方法。
Channeling radiation could provide a viable source for digital energy subtraction angiography (DESA). A signal to noise ratio (SNR) of 6.2 for a resolution of 0.5 mm×0.5 mm could be achieved using a 6‐mA 100‐ms 20‐MeV electron‐beam pulse and a diamond channeling crystal as the x‐ray source. This article investigates the choice of a DESA contrast agent and the parameters of a channeling‐radiation x‐ray source to develop a channeling‐radiation DESA imaging system. The production of dual‐energy peaks, the maximum available x‐ray flux, the advantages of an area exposure, the necessity of a mosaic Bragg‐crystal filter to reduce patient dose, the optimal energy separation of the peaks for a quasimonochromatic x‐ray source, and the reduction of the signal from bone are discussed, leading to estimated SNRs and image resolution for a channeling‐radiation imaging system. The computer analysis developed to calculate the image quality is also discussed.