| SONG Tie-li,ZHENG Lei,LI Ya-gang.125I seed fixity after implantation in parotid region[J].Chinese Journal of Radiological Medicine and Protection,2008,28(5):517-519 |
| 125I seed fixity after implantation in parotid region |
| Received:September 15, 2007 |
| DOI： |
| KeyWords:125I seed implantation Fixity Treatment planning system Parotid |
| FundProject: |
| Author Name | Affiliation | E-mail | | SONG Tie-li | Department of Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China | songironsand@163.com | | ZHENG Lei | Department of Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China | | | LI Ya-gang | 北京大学第一医院放射治疗科 | | | 黄明伟 | Department of Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China | | | 张杰 | Department of Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China | | | 张建国 | Department of Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China | |
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| Abstract:: |
| Objective To observe the fixity of 125I seed after implantation in parotid region. Methods Ten patients treated with 125I seed interstitial brachytherapy in parotid were randomly selected. Within one week after the treatment, two plane radiographs were taken by radiotherapy simulator and 125I seed was counted. All plane dosimetry analysis were performed by treatment planning system. The areas surrounded by 50%,100% and 150% of prescription dose curve and dose equality index were calculated. Two months after the treatment, the same examination were repeated and were compared with t test. Results The number of seeds was equal in two examination. There were no significant differences in two examinations either for the areas surrounded by 50%,100% and 150% of prescription dose curve or for the dose equality index. Conclusions The position of 125I seed after implantation in parotid region is quite fixable, which can ensure the curative effect. |
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