血液对相衬X射线成像的对比效果。
Contrast effect of blood on phase-contrast X-ray imaging.
作者信息
Momose A, Takeda T, Itai Y
机构信息
Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Japan.
出版信息
Acad Radiol. 1995 Oct;2(10):883-7. doi: 10.1016/s1076-6332(05)80067-4.
RATIONALE AND OBJECTIVES
As a preliminary study for application of phase-contrast X-ray imaging to medicine, we measured the X-ray refractive index of human blood and its influence on image contrast.
METHODS
Using an X-ray interferometer, the X-ray phase shifts caused by human blood and its ingredients were measured from the interval of interference fringes.
RESULTS
The X-ray phase shift caused by blood was 3% larger than that caused by serum.
CONCLUSION
The large phase shift caused by blood is due to red blood cells, which contain hemoglobin molecules with iron atoms. It is possible that blood produces a structure in a phase-contrast X-ray image.
原理与目的
作为将相衬X射线成像应用于医学的初步研究，我们测量了人体血液的X射线折射率及其对图像对比度的影响。
方法
使用X射线干涉仪，根据干涉条纹的间距测量人体血液及其成分引起的X射线相移。
结果
血液引起的X射线相移比血清引起的大3%。
结论
血液引起的大相移归因于红细胞，其含有带有铁原子的血红蛋白分子。血液有可能在相衬X射线图像中产生一种结构。
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