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《Chinese Journal of Control of Endemic Disenaces》 2001-02
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The value of evaluation on quality of X-ray photographs in diagnosis of Ke-shan Disease

Zhang Huafang, Li Hengxiang, Xiang Youzhang (Shandong Provincial Institute of Endemic Diseases Control and Prevention, Jinan 250014)  
Objective To establish quality evluation standards for chest orthophoric X- ray photographs to be applied in diagnosis and surveillance of Ke - shan disease. Methods Chest orthophoric X - ray photographs of 500 cases with Ke- shan disease were selected from the population in the endemic areas. The subjective method was used to valuate quality, establishing4 grades(A,B,C,D) and observation contents to shaw the difference directly in the quality of chest X- ray photographs. At the same tine 3 regions were selected from observation contents of photograph, measuring with the densimeter. And the objective method was used to test and verify the effect of evaluation with the subjective method. Results In the fluctuating scape and difference of density detection for photographs, grade A grade B grade C, therefore grade A photographs were of best quality, with clear images,easy to be observed, and with a high rate of precision for cardiac measuring and diagnosing; Standards for grading of photograph quality were established to detect the quality of photographs, excluding the interference with and effect on the reliability of determining the size of the heart of the Ke - shan disease case by the factor of quality. Conclusions Evaluation on quality of chest orthophoric X - ray photographs is of great significance for diagnosis of Ke - shan disease and determination of the size of the heart and can be expanded for application.
【CateGory Index】: R542.3
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