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目前,对医用诊断X射线辐射源检定的依据是JJG744-2004《医用诊断X射线辐射源》检定规程。在检定过程中笔者发现,分别用X射线机标称值和实测值来计算的辐射输出非线性的结果存在较大偏差。笔者认为使用实测值更能准确真实地反映辐射源的特性。按JJG744-2004的要求,在检定辐射输出的线性时,应将X射线球管管电压调至规定的挡位,任意选择两挡辐照时间和X射线球管管电流的积,根据其辐射输
At present, the basis of the medical diagnostic X-ray radiation source test is JJG744-2004 “medical diagnostic X-ray radiation source” test protocol. During the verification process, the author found that the results of the nonlinearity of the radiation output calculated by using the nominal values and the measured values of the X-ray machine respectively have large deviations. I believe that the use of measured values more accurately and accurately reflect the characteristics of the radiation source. According to the requirements of JJG744-2004, when verifying the linearity of the radiation output, the X-ray tube voltage should be adjusted to the prescribed gear position, and the product of the irradiation time of the two-beam tube and the X-ray tube current should be arbitrarily selected. According to the radiation lose