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通过对252例常规电压和高仟伏胸片对照阅片后,提出高仟伏胸片由于不再是光电吸牧,绝大部份为康普顿-吴有训吸收,其结果是黑白对比下降,细微结构显示清楚,全片层次丰富。再加上高仟伏摄影能有效利用胶片最佳性能的直线部,其密度增长与透过量成正比,透过量稍有变化,影像密度的变化肉眼即能辨别,因此对尘肺在X线片上的3mm以下的影像(p、q、s、t),清晰度、解像力都有显著提高。分析结果证明高仟伏胸片此常规电压胸片提高校正率达24.6％,是诊断尘肺的较好手段,值得广泛应用。
After 252 cases of conventional voltage and high thousands of volt chest X-ray control reading, the proposed high 1000 volt chest film is no longer photo-electric grazing, the vast majority of Compton - Wu Youxun absorption, the result is a decline in black and white contrast, Fine structure shows clearly, the entire film-rich. Coupled with high-kV photography can effectively use the best performance of the film straight line, its density increases with the penetration is proportional to the amount of slight changes in the image density changes can be identified with the naked eye, so the pneumoconiosis on the X-ray film 3mm below the image (p, q, s, t), sharpness, resolution are significantly improved. The results show that high-kV chest X-ray film to improve the correction rate of the conventional voltage chest film up to 24.6%, is a good tool for the diagnosis of pneumoconiosis, it is widely used.