AAPM protocol for 40-300 kV x-ray beam dosimetry in radiotherapy and radiobiology
AAPM protocol for 40-300 kV x-ray beam dosimetry in radiotherapy and radiobiology
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DOI：
10.1118/1.1374247
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发表时间：
2001-06-01
期刊：
影响因子：
3.8
通讯作者：
Seuntjens, JP
中科院分区：
文献类型：
--
作者：
Ma, CM;Coffey, CW;Seuntjens, JP
美国医学物理学家协会（AAPM）提出了一项由放射治疗委员会第61工作组制定的新协议，用于放射治疗和放射生物学的低能量和中等能量X射线的参考剂量测定（40 kV小于或等于管电位小于或等于300 kV）。它是基于电离室校准空气中的空气比释动能。如果感兴趣点位于或接近表面，则应使用整个能量范围内的统一方法，根据空气中测量值确定水模表面的水吸收剂量（“空中”方法），如果感兴趣点在某一深度，对于大于或等于100 kV的管电位，应使用2 cm深度的水中测量（“体模内”方法）。不建议将体模内方法用于管电位
The American Association of Physicists in Medicine (AAPM) presents a new protocol, developed by the Radiation Therapy Committee Task Group 61, fur reference dosimetry of low- and medium-energy x rays for radiotherapy and radiobiology (40kV less than or equal to tube potential less than or equal to 300 kV). It is based on ionization chambers calibrated in air in terms of air kerma. If the point of interest is at or close to the surface, one unified approach over the entire energy range shall be used to determine absorbed dose to water at the surface of a water phantom based on an in-air measurement (the "in-air" method), If the point of interest is at a depth, an in-water measurement at a depth of 2 cm shall be used for tube potentials greater than or equal to 100 kV (the "in-phantom'' method). The in-phantom method is not recommended for tube potentials