| GUO Yan-yan,BI Ping,LI Xiao-dong,et al.Comparison of the absorbed dose measurement methods for high-energy electron beams[J].Chinese Journal of Radiological Medicine and Protection,2013,33(3):314-317 |
| Comparison of the absorbed dose measurement methods for high-energy electron beams |
| Received:October 26, 2012 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.03.024 |
| KeyWords:Radiotherapy Dosimetry Absorbed dose Ionization chamber |
| FundProject: |
| Author Name | Affiliation | E-mail | | GUO Yan-yan | Department of Radiation Oncology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China | | | BI Ping | Department of Radiation Oncology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China | biping63@yahoo.com | | LI Xiao-dong | Department of Radiation Oncology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China | | | DAI Yue | Department of Radiation Oncology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China | |
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| Abstract:: |
| Objective To study the difference in the measurement of the absorbed dose in water between the dosimetry protocols of IAEA TRS-398 and TRS-277 for high-energy electron beams.Methods The differences were compare in absorbed doses from 6 kinds of electron beams among the three methods of using cylindrical chamber,plane-parallel chamber and cross-calibrated plane-parallel chamber which was calibrated in user’s high-energy electron beam according to IAEA TRS-398 and IAEA TRS-277. Results The difference in absorbed doses measured, following the two protocols, was 0.4%-2.3% for plane-parallel chamber, 0.6%-2.2% for cylindrical chamber,and 0.5%-2.0% for cross-calibrated chamber. The differences in measured absorbed doses between the two dosimetry protocols were slight. Conclusions The methods used to determine absorbed dose to water recommanded by IAEA TRS-398 for high-energy beams are more accurate and more suitable for clinical users to measure compared to the TRS-277. |
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