X射线发生器实际峰值电压的测量

Practical peak voltage of X-ray generator

目的初步分析X射线发生器实际峰值电压(PPV)的测量误差及其测量差异。方法采用PPV测量方法对不同X射线成像设备进行测量。结果平均峰值电压的测量误差为-1.4～+1.7kV,最大峰值电压测量变化为-0.9～+2.2kV,PPV测量偏差为-3.7～-0.8kV。结论由于计算方法的不同,PPV测量值普遍低于设定电压值和平均值,因而总体测量误差高于平均值和最大峰值电压的测量误差。

Objective To analyze the measurement variation for practical peak voltage（PPV）.Methods Different X-ray imaging equipments were measured by PPV method.Results The variation of average peak voltage was-1.4 to ＋ 1.7 kV and the maximum peak voltage measurement was-0.9 to ＋ 2.2 kV and the actual peak voltage measurement error was-3.7 to-0.8 kV.Conclusion Since the calculation methods are different,the PPV values are generally lower than kV settings and average peak voltage,thus the overall measurement error of PPV is higher than the measurement error of average and maximum peak voltage.