| LI Ding-jie,WU Hui,MAO Rong-hu,et al.Application of CT image-guided technology in radiotherapy of the mid-and upper-thoracic esophageal carcinoma[J].Chinese Journal of Radiological Medicine and Protection,2013,33(6):623-625 |
| Application of CT image-guided technology in radiotherapy of the mid-and upper-thoracic esophageal carcinoma |
| Received:February 26, 2013 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.06.014 |
| KeyWords:Esophageal carcinoma radiotherapy CT-based image guidance Set-up error Organ motion Clinical target volume margins |
| FundProject: |
| Author Name | Affiliation | E-mail | | LI Ding-jie | Henan Province Tumor Hospital, Zhengzhou 450008, China | | | WU Hui | Henan Province Tumor Hospital, Zhengzhou 450008, China | | | MAO Rong-hu | Henan Province Tumor Hospital, Zhengzhou 450008, China | | | YANG Cheng-liang | Henan Province Tumor Hospital, Zhengzhou 450008, China | | | LEI Hong-chang | Henan Province Tumor Hospital, Zhengzhou 450008, China | | | WANG Jian-hua | Henan Province Tumor Hospital, Zhengzhou 450008, China | huajianye@sina.cn |
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| Abstract:: |
| Objective To compare the clinical target volume (CTV) expanding margins in the mid-and upper-thoracic esophageal carcinoma during radiotherapy measured with and without online image guidance technique by CT on rail. Methods100 patients with mid-and upper-thoracic esophageal carcinoma undergoing intensity modulated radiotherapy received CT scanning.Image registration was conducted between the scanning results and the planned CT images, thus set-up error data were acquired and got on-line correction. Fifty patients were randomly selected to undergo additional post-treatment CT scanningso as to analyze the revised residuals, displacement during treatment, and infra-fraction GTV shifts. Results Compared to the radiotherapy without CT-based image guidance, the CTV expanding margins obtained with CT-based image guidance was reduced significantly from 9.1, 8.8 and 6.1 mm to 4.1, 4.5 and 4.3 mm in the left-right, head-feet, and belly-back directions respectively. Conclusions The on-line image-guided technology significantly improves the accuracy of target and reduces the CTV expanding margins. |
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