EFFECT OF ABSORPTION-EDGE FILTERS ON DIAGNOSTIC X-RAY-SPECTRA
EFFECT OF ABSORPTION-EDGE FILTERS ON DIAGNOSTIC X-RAY-SPECTRA
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DOI：
10.1148/115.2.431
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发表时间：
1975-01-01
期刊：
影响因子：
19.7
通讯作者：
GREENBERG, D
中科院分区：
文献类型：
--
作者：
ATKINS, HL;FAIRCHILD, RG;GREENBERG, D
用锗半导体探测器测量了诊断X射线束的光谱。利用该系统可以确定钨靶的k α1、kα2、kβ1和k β2特征峰。利用特征吸收边产生“带通”效应，研究了各种滤波器对光束的影响。用于对比研究的诊断射束的钆过滤选择性地去除较高能量光子（> 50 keV）和较低能量光子（< 33 keV），从而增强碘和钡的对比度，同时显著降低辐射剂量。
The spectra of diagnostic x-ray beams were measured with a germanium semiconductor detector. With this system it was possible to define thekα1,kα2,kβ1, andkβ2 characteristic peaks of the tungsten target. The effects of various filters on the beam using characteristic absorption edges to create a “bandpass” effect were studied. Gadolinium filtration of the diagnostic beam used for contrast studies selectively removed both higher energy photons (> 50 keV) and lower energy photons (< 33 keV) thus enhancing contrast for iodine and barium while substantially reducing radiation dose.