The status of osteoporosis in 54 volunteers was measured by Single Photon Absorptiometry and measurement of the X-ray film with a self-control trial design.

用单光子吸收扫描与X线摄片计测法，对54例测试者的骨质疏松情况进行了自身对照测定和比较。

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The paper analytically discusses two factors, the spectrum of photon and the scattered radiation by the detector, which affect the attenuation efficient of the object in flash X-ray radiography.

研究闪光照相中影响材料有效吸收系数的两个主要因素，即X光的能谱效应和散射影响。

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Shield material with some certain composition can absorb a large part of low energy photon of X-ray and reduce the radiation effect on electronic component.

采用一定组分的材料对X射线进行辐射屏蔽，可以吸收大部分的低能光子，减少X射线对电子系统的辐射损伤。

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