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《Modern Medical Imagelogy》 2012-01
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To Study Infants of Thorax Iow Dose DR Radiography

Guo Liangdong Lou Conghui Sun Jincheng Huang Ru Liu Jia Department of Radiography,The People′s Hospital of Pizhou, Jiang su,Province 221300,P.R.China  
Purpose:Infants of thorax low dose DR photography reasonable exposure technique condition,reduce the subject's exposure(mAs) and ensure the image quality and radiation dose.Materials and Methods:July-September 2011 randomly selected came to our hospital for chest DR photography of children under 2 years old in 60 cases as the research object,aged 3 days to 21 mouth,mean age 5.5 months,gender random;30 cases of conventional dose groups,using the system to set up fixed chest radiography in infant conditions(65kV,4mAs,4.44ms),30 patients with low dose group,the 90kV,AEC automatic exposure mode for automatic exposure,automatic exposure control sensitivity selection 400.Records of two groups of exposure parameters and carries on statistics processing.Results:90kV 65kV photography exposure than the highest decrease by 5.37 times,2.61 times the minimum reduction,reduced the average 3.69 times;dose area product values(DAP) decreased 4.04 times the highest,lowest 1.38 times lower,reduced the average 1.98 times;two groups of mAs were paired t test,t=70.5,P 0.0005,with statistical significance,on two groups of DAP paired t test,t = 52,P0.0005,with statistical significance;on two groups of image quality were analyzed by x2 test,X2=0.6,P0.05,not statistically significant.Conclusion:Infants under 2 years of age DR chest photography thousand Fu Yi chose 90kVp,can reduce the subject's mAs and radiation dose,and the image quality and conventional dose groups have not obvious difference.
【CateGory Index】: R816.92
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