[日本医学物理学会01号和12号光子束中对水的吸收剂量比较]

[A comparison of absorbed doses to water in photon beams in Japan Society of Medical Physics 01 and 12].

作者信息

Kinoshita Naoki, Takemura Akihiro, Nishimoto Yasuhiro, Kita Akinobu, Toi Akiko, Murai Emi, Shimada Masato, Sasamoto Kouhei, Adachi Toshiki

机构信息

Department of Radiology, University of Fukui Hospital, Japan.

出版信息

Nihon Hoshasen Gijutsu Gakkai Zasshi. 2013 Mar;69(3):284-7. doi: 10.6009/jjrt.2013_jsrt_69.3.284.

DOI:10.6009/jjrt.2013_jsrt_69.3.284

PMID:23514857

Abstract

A comparison of absorbed doses to water at a calibration depth determined by Japan Society of Medical Physics (JSMP) 12 and 01 was conducted, using a farmer type ionization chamber. The absorbed dose to water calibration factor (ND,W,Q0) and beam quality conversion factor (kQ,Q0) for JSMP 12 were smaller than the absorbed dose to water calibration factor and beam quality conversion factor for JSMP 01. Differences in absorbed doses at a calibration depth were -0.78% for 6 MV photon beam and -0.94% for 10 MV photon beam. In the present experiment, absorbed doses at a calibration depth were measured, using a farmer type ionization chamber. Further experiments at a larger number of facilities should be conducted to reveal the status of measurement of absorbed doses at a calibration depth using JSMP 12.

摘要

使用 Farmer 型电离室，对日本医学物理学会（JSMP）12 和 01 确定的校准深度处水的吸收剂量进行了比较。JSMP 12 的水吸收剂量校准因子（ND,W,Q0）和射束质转换因子（kQ,Q0）小于 JSMP 01 的水吸收剂量校准因子和射束质转换因子。校准深度处吸收剂量的差异，对于 6 MV 光子束为 -0.78%，对于 10 MV 光子束为 -0.94%。在本实验中，使用 Farmer 型电离室测量了校准深度处的吸收剂量。应在更多设施中进行进一步实验，以揭示使用 JSMP 12 测量校准深度处吸收剂量的情况。