Addendum to the AAPM's TG-51 protocol for clinical reference dosimetry of high-energy photon beams
Addendum to the AAPM's TG-51 protocol for clinical reference dosimetry of high-energy photon beams
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DOI：
10.1118/1.4866223
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发表时间：
2014-04-01
期刊：
影响因子：
3.8
通讯作者：
Seuntjens, Jan
中科院分区：
文献类型：
--
作者：
McEwen, Malcolm;DeWerd, Larry;Seuntjens, Jan
本文对美国原子物理学会（AAPM）的TG-51协议提出了一个附录，用于确定兆伏光子束中水的吸收剂量。本附录延续了TG-51中规定的程序，但根据Monte Carlo模拟提供了光子束的新k（Q）数据，并给出了提高协议实施的准确性和一致性的建议。介绍了参考点水吸收剂量测量不确定度的组成，并讨论了各分量的大小。最后讨论了N-D、N-w系数实验测定的一致性。假设用户已经熟悉TG-51，预计本附录的实施将是简单的。本报告所作的改动一般都很小，但新的建议可能会导致个别用户的程序改动。预计医学物理学家实施本附录的工作量不会很大，可以作为年度直线加速器校准的一部分。(C)2014年美国医学物理学家协会。
An addendum to the AAPM's TG-51 protocol for the determination of absorbed dose to water in megavoltage photon beams is presented. This addendum continues the procedure laid out in TG-51 but new k(Q) data for photon beams, based on Monte Carlo simulations, are presented and recommendations are given to improve the accuracy and consistency of the protocol's implementation. The components of the uncertainty budget in determining absorbed dose to water at the reference point are introduced and the magnitude of each component discussed. Finally, the consistency of experimental determination of N-D,N-w coefficients is discussed. It is expected that the implementation of this addendum will be straightforward, assuming that the user is already familiar with TG-51. The changes introduced by this report are generally minor, although new recommendations could result in procedural changes for individual users. It is expected that the effort on the medical physicist's part to implement this addendum will not be significant and could be done as part of the annual linac calibration. (C) 2014 American Association of Physicists in Medicine.