Thomas R G, Sluis-Cremer G K
Br J Ind Med. 1977 Nov;34(4):281-90. doi: 10.1136/oem.34.4.281.
Some details of the physics of xeroradiography, and the bearing these have on films of the lung obtained by this technique, are discussed. In experiments designed to obtain useful films with a minimum of radiation exposure it was found that an exposure range of 10-30 mas at 200 kV at 1.35 m (4 1/2 ft) without a grid or air gap gave very satisfactory results. The positive model of development was considered to give more information than the negative mode. One hundred and fourteen miners who had been exposed to silica dust, asbestos dusts or both, were examined by this technique. The xeroradiographs were compared with silver halide films taken at 200 kV. The xeroradiographs were considered to be superior in several respects, especially in the delineation of vascular shadows, normal and abnormal linear opacities. Linear opacities in asbestos-exposed subjects were better shown on the xeroradiographs and were occasionally seen on these films when the 200 kV conventional film was entirely normal. Small rounded opacities of silicosis were very poorly shown on the xeroradiographs. Pleural thickening and pleural plaques may be very well demonstrated.
本文讨论了干板X线照相术的一些物理细节，以及这些细节对用该技术获得的肺部X光片的影响。在旨在以最小辐射暴露获得有用X光片的实验中发现，在200 kV、1.35米（4.5英尺）距离且无滤线栅或空气间隙的条件下，10 - 30毫安秒的曝光范围能给出非常令人满意的结果。正片显影模式被认为比负片模式能提供更多信息。用该技术对114名曾接触二氧化硅粉尘、石棉粉尘或两者皆接触的矿工进行了检查。将干板X线照片与在200 kV下拍摄的卤化银胶片进行了比较。干板X线照片在几个方面被认为更具优势，尤其是在描绘血管阴影、正常和异常线性阴影方面。在接触石棉者中，线性阴影在干板X线照片上显示得更好，并且当200 kV传统胶片完全正常时，在这些胶片上偶尔也能看到。矽肺的小圆形阴影在干板X线照片上显示得很差。胸膜增厚和胸膜斑可能显示得非常好。
