基于B样条的弹性配准在放疗CT图像间配准的应用

被引:6
作者
庞皓文
孙小扬
杨波
罗惠群
吴虹
吴敬波
机构
[1] 泸州医学院附属医院肿瘤科
关键词
B样条; 弹性配准; 自由形变模型; CT;
D O I
暂无
中图分类号
R814.42 [电子计算机扫描]; TP391.41 [];
学科分类号
080203 ;
摘要
目的:应用B样条弹性模型研究肿瘤患者放疗前CT图像与放疗后CT图像之间的弹性配准。方法:利用B样条自由弹性模型(free-form deformations,FFD),以灰度差平方和(Sum of Squared Differences,SSD)为相似性测度函数,通过基于多分辨率的B样条弹性配准方法对同一患者放疗前与放疗后的CT图像进行配准。结果:图像通过高斯滤波处理,应用B样条弹性模型,得到较为理想的弹性配准实验结果。结论:基于B样条的CT与CT图像弹性配准可以较好地建模放疗前与放疗后肿瘤区域的形变,为临床分析肿瘤的变化提供支持。
引用
收藏
页码:2887 / 2889
页数:3
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