脑部计算机断层扫描中的对比度。
Contrast in computerized transverse axial tomography of brain.
作者信息
Drukier A K
出版信息
Phys Med Biol. 1977 Sep;22(5):912-8. doi: 10.1088/0031-9155/22/5/010.
PMID:909927
Abstract
A study of contrast in photon transmission tomography of brain is presented. Quantitative evaluation of linear attenuation coefficients due to photo-electric, Compton and pair creation effects suggests that the use of photons of a few MeV considerably improves the contrast between white and grey brain matter. The patient dose at different photon energies is calculated.
摘要
本文介绍了一项关于脑部光子传输断层扫描中对比度的研究。对光电效应、康普顿效应和电子对产生效应所导致的线性衰减系数进行定量评估表明，使用几兆电子伏特的光子可显著提高脑白质和脑灰质之间的对比度。计算了不同光子能量下的患者剂量。
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