| YU Guang-wei,MAO Xin-jian,ZHU Xiao-yang.Fluence map editing to control hot and cold spots of IMRT plan[J].Chinese Journal of Radiological Medicine and Protection,2007,27(5):494-496 |
| Fluence map editing to control hot and cold spots of IMRT plan |
| Received:July 24, 2006 |
| DOI： |
| KeyWords:Optimization Fluence map editing Cold spots Hot spots |
| FundProject: |
| Author Name | Affiliation | | YU Guang-wei | Department of radiation oncology, Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China | | MAO Xin-jian | 湖州市中心医院介入放射治疗科 | | ZHU Xiao-yang | Department of radiation oncology, Second Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou 310009, China |
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| Abstract:: |
| Objective To investigate the advantage of manually editing intensity-modulated radiation therapy(IMRT) fluence maps to control hot and cold spots that the IMRT optimization cannot control. Methods Five patients with head-and-neck cancers were randomly enrolled, retrospective treatment planning study was performed to compare the efficiency between re-optimization and fluence maps editing to control dose hot and cold spots. Results Compared with the dose distribution of the first optimization, doses at hot(cold) spots decreased(increased) in the re-optimization plan with a median value of 1.1%(0.5%) and 4.2%(1.0%), respectively. Conclusions The fluence map editing technique on IMRT was proved effective to control hot and cold spots, especially when re-optimization cannot get a satisfactory result. |
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