Application of CT image-guided technology in radiotherapy of the mid-and upper-thoracic esophageal carcinoma / 中华放射医学与防护杂志
Chinese Journal of Radiological Medicine and Protection
; (12): 623-625, 2013.
Article
in Zh
| WPRIM
| ID: wpr-439244
Responsible library:
WPRO
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.Methods 100 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.
Full text:
1
Database:
WPRIM
Type of study:
Guideline
Language:
Zh
Journal:
Chinese Journal of Radiological Medicine and Protection
Year:
2013
Document type:
Article