| WANG Yan-yang,FU Xiao-long,GONG Min,XIA Bing,FAN Min,YANG Huan-jun,XU Zhi-yong,jIANG Guo.Comparison between electronic portal imaging device (EPID) and cone-beam CT (CBCT) in image-guided thoracic tumor radiotherapy[J].Chinese Journal of Radiological Medicine and Protection,2009,29(6):643-645 |
| Comparison between electronic portal imaging device (EPID) and cone-beam CT (CBCT) in image-guided thoracic tumor radiotherapy |
| Received:December 09, 2008 |
| DOI：10.3760/cma.j.issn.0254-5098.2009.06.031 |
| KeyWords:Image-guided radiotherapy Electronic portal imaging device Kilovoltage cone-beam CT Thoracic tumor Set-up error Workflow |
| FundProject:卫生部临床学科重点项目(2004486),上海市科委重点项目(34119814) |
| Author Name | Affiliation | E-mail | | WANG Yan-yang | Department of Radiation Oncology, Affiliated Hospital of Ningxia Medical University, Yinchuan 750004, China | | | FU Xiao-long | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | xlfu1964@126.com | | GONG Min | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | | | XIA Bing | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | | | FAN Min | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | | | YANG Huan-jun | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | | | XU Zhi-yong | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | | | jIANG Guo | 复旦大学附属肿瘤医院放疗科, 复旦大学上海医学院肿瘤学系 | |
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| Abstract:: |
| Objective To compare the set-up error detected by electronic portal imaging device (EPID) with cone-beam CT (CBCT) for patients with thoracic tumor, and to explore the impact on the workflow of different imaging-guided device. Methods From Mar 2007 to Jan 2008, 17 patients with pathologically confirmed thoracic tumor, including lung, esophagus and thymoma, were included in this study. Each patient received both EPID based-CBCT based_imaging_guided analysis once a week. Results A total of 81 pairs of EPI and CBCT scan from 16 patients except one case were obtained during treatment. Compared with EPID based_imaging guided analysis, CBCT based_imaging guided analysis did not increase the total treatment time significantly. The average set-up error of EPID was (-0.1±3.2), (1.3±3.7) and (-0.2±3.1)mm in the left-right (LR),superior-inferior (SI) and anterior-posterior (AP) directions, respectively (±SD). But the average set-up error,while that of CBCT was (0.1±4.6),(0.6±4.0) and (-0.9±4.6)mm in the LR, SI and AP directions, respectively. Conclusions CBCT would be better than EPID in detecting set-up error of the thoracic tumor patients. Compared with EPID, CBCT based_imaging guided analysis could not influence the workflow of radiotherapy significantly. CBCT based_imaging guided analysis might be more efficient than EPID. |
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