| LI Qin,HAN Jun,SUN Chang-geng,et al.A patient-specific quality assurance program for the dose delivery of intensity modulated radiotherapy[J].Chinese Journal of Radiological Medicine and Protection,2007,27(2):170-171 |
| A patient-specific quality assurance program for the dose delivery of intensity modulated radiotherapy |
| Received:April 20, 2006 |
| DOI： |
| KeyWords:Individualization Dose verification Intensity modulated radiotherapy |
| FundProject:湖北省科技攻关资助项目(4-255) |
| Author Name | Affiliation | E-mail | | LI Qin | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, China | | | HAN Jun | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, China | | | SUN Chang-geng | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, China | | | 伍钢 | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, China | wugangzr@yahoo.com.cn | | 邓光宇 | Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, China | |
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| Abstract:: |
| Objective To establish a standard program of the dose delivery for every individual patient and to study the criterion of quality assurance in intensity modulated radiotherapy (IMRT). Methods 33 nasopharynx cancer (NPC) IMRT treatment plan were designed, then transferred to the hybrid plan in a 3D treatment plan system (CMS Xio). The reference data were obtained. A ion chamber and Kodak EDR2 films were used to measure the absolute dose and the relative dose distribution, and difference between the reference value and measure value were evaluated with an advance criterion. Results For 32 cases, the absolute dose value at the isocenter was below the tolerance limit of 5%; for one case, the dose value exceeded the range, but re-meet the demand through adjusting the measure point to a flat region of dose distribution. For relative dose distribution, all cases meet the tolerance limit of 5% and 3 mm distance difference. Conclusions To establish a standard program for individual patient is very important for the exact implement of IMRT plan. |
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