Deshpande N A, Wilkinson J M
North Western Medical Physics Department, Christie Hospital, Manchester, UK.
Br J Radiol. 1994 Feb;67(794):194-9. doi: 10.1259/0007-1285-67-794-194.
A technique for deriving the reference air kerma rate for low activity brachytherapy sources that is traceable to the therapy level standard at the National Physical Laboratory is presented. Correction factors have been generated to account for the finite source and detector size. The air kerma rate calibration of the secondary standard for caesium quality has been derived by polynomial curve fitting. The reference air kerma rates for several caesium tubes and needles have been determined and the results compared with the manufacturers' source test reports. For all the source types used the agreement between methods was within 2%.
本文介绍了一种用于推导低活度近距离放射治疗源参考空气比释动能率的技术，该技术可追溯至国家物理实验室的治疗水平标准。已生成校正因子以考虑源和探测器的有限尺寸。通过多项式曲线拟合得出了铯质量二级标准的空气比释动能率校准值。已确定了几种铯管和针的参考空气比释动能率，并将结果与制造商的源测试报告进行了比较。对于所使用的所有源类型，不同方法之间的一致性在2%以内。
