| HAN Jun,LI Qin,CAO Ting,LIANG Zhi-wen,CHEN Mi.The dose rate response characterization of four kinds of dosimeters for linear accelerator[J].Chinese Journal of Radiological Medicine and Protection,2012,32(5):527-529 |
| The dose rate response characterization of four kinds of dosimeters for linear accelerator |
| Received:March 26, 2012 |
| DOI：10.3760/cma.j.issn.0254-5098.2012.05.023 |
| KeyWords:Dose rate Dose verification Dosimeter Response characterization |
| FundProject: |
| Author Name | Affiliation | E-mail | | HAN Jun | Oncology Center, Union Hospital, Huazhong University of Science and Technology, Tongji Medical College, Wuhan 430023, China | | | LI Qin | Oncology Center, Union Hospital, Huazhong University of Science and Technology, Tongji Medical College, Wuhan 430023, China | lq20092wh@yahoo.com.cn | | CAO Ting | Oncology Center, Union Hospital, Huazhong University of Science and Technology, Tongji Medical College, Wuhan 430023, China | | | LIANG Zhi-wen | Oncology Center, Union Hospital, Huazhong University of Science and Technology, Tongji Medical College, Wuhan 430023, China | | | CHEN Mi | Oncology Center, Union Hospital, Huazhong University of Science and Technology, Tongji Medical College, Wuhan 430023, China | |
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| Abstract:: |
| Objective To explore the dose rate response characterization of four kinds of dosimeters for clinical application. Methods Within the range of 100-600 cGy/min, the dose rate responses of the PTW 0.6 cm3 ion chamber, 0.015 cm3 ion chamber, Matrixx Evolution 2D diode array and MapCHECK 2D diode array under the same measuring conditions were measured. The dose rate response of the PTW 0.6 cm3 ion chamber under different energy and working voltage were analyzed.Results All ionization chamber types of measured equipment showed certain dose rate dependence for 6 MV X-rays. All the differences were below 1%.The dose rate dependence disappeared for 15 MV X-rays. The 2D diode array had strong dose rate dependence and the response difference was about 2%.Conclusions It is necessary to test and analyze the dose rate response of the measured equipment in treatment technology with dose rate varying, in order to ensure the precision of daily calibration and dose verification. |
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