中国医疗设备Issue(2)：49-52,4.DOI:10.3969/j.issn.1674-1633.2015.02.012
锥形束CT在宫颈癌放疗中的应用
Application of Cone Beam CT in Radiotherapy for Cervical Cancers
马广栋 1洪莉 1洪莎莎 1刘成1
作者信息
- 1. 武汉大学人民医院妇产科，湖北武汉430060
- 折叠
摘要
Abstract
Objective To discuss the feasibility of CBCT (Cone Beam Computerized Tomography) in detecting the volume change of the bladder and cervical target in image-guided radiotherapy for cervical cancers. Methods Ten cervical cancer patients were selected and asked to keep their bladders full. Then, the outline of bladders and cervical targets was made in the CT simulation and CBCT images which were obtained in the same window width and position. The volume of the bladder and cervical targets was calculated by the Varian Planning System so as to compare the volume changes in each radiation as well as the relative volume changes (the proportion of the contoured organ volume in CBCT to that in CT) in bladders and cervical targets. Results The volume of the bladder and cervical targets acquired by CBCT in all the patients varied from time to time and from patient to patient. The volume changes of bladders were between-35.15%and+16.24%;while the volume changes of cervical targets ranged from+21.26%to-76%. The maximum, minimum and mean relative volume of bladders was 1.5, 0.65 and 0.96 respectively. With the increase in the radiotherapy, the volume of cervical targets obtained by CBCT reduced, especially in the 4th and 5th weeks. Conclusion Cone beam CT can be used to detect the volume changes of bladders and cervical targets in radiotherapy for cervical cancers, which provided a basis for clinicians to modify the radiotherapy plan.关键词
锥形束CT/宫颈癌/膀胱体积/宫颈靶区体积/相对体积Key words
cone beam computerized tomography/cervical cancer/volume of bladders/volume of cervical targets/relative volume分类
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马广栋,洪莉,洪莎莎,刘成..锥形束CT在宫颈癌放疗中的应用[J].中国医疗设备,2015,(2):49-52,4.
