Toward optimal matching for 3D reconstruction of brachytherapy seeds.
Toward optimal matching for 3D reconstruction of brachytherapy seeds.
复制标题
实现近距离放射治疗种子 3D 重建的最佳匹配。
DOI：
10.1007/978-3-540-75759-7_85
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Prince,Jerry
中科院分区：
文献类型：
--
作者：
Labat,Christian;Jain,Ameet;Fichtinger,Gabor;Prince,Jerry
X射线C形臂透视是前列腺近距离放射治疗术中粒子定位的自然选择。求解投影图像中种子的对应关系可以建模为NP难的分配问题。我们的方法依赖于实际观察，最佳解决方案几乎为零的成本，如果C形臂的姿势是准确的。这使我们能够推导出一个等价的降维问题，使用线性规划，可以在多项式时间内有效地解决。此外，与现有技术相比，我们的方法证明了对C形臂姿态误差的显著增加的鲁棒性。因为在实际临床情况下，跟踪C形臂是非常困难的，所以放松该约束具有额外的实际效用。
X-ray C-arm fluoroscopy is a natural choice for intra-operative seed localization in prostate brachytherapy. Resolving the correspondence of seeds in the projection images can be modeled as an assignment problem that is NP-hard. Our approach rests on the practical observation that the optimal solution has almost zero cost if the pose of the C-arm is known accurately. This allowed us to to derive an equivalent problem of reduced dimensionality that, with linear programming, can be solved efficiently in polynomial time. Additionally, our method demonstrates significantly increased robustness to C-arm pose errors when compared to the prior art. Because under actual clinical circumstances it is exceedingly difficult to track the C-arm, easing on this constraint has additional practical utility.