WHOLE BODY NONRIGID CT-PET REGISTRATION USING WEIGHTED DEMONS.
WHOLE BODY NONRIGID CT-PET REGISTRATION USING WEIGHTED DEMONS.
复制标题
使用加权恶魔进行全身非刚性 CT-PET 配准。
DOI：
10.1109/isbi.2011.5872622
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Papademetris,X
中科院分区：
文献类型：
--
作者：
Suh,JW;Kwon,Oh-K;Scheinost,D;Sinusas,AJ;Cline,GaryW;Papademetris,X
提出了一种新的大鼠全身CT图像和PET图像的配准方法。CT和PET图像是在不同时间在单独的扫描仪中采集的，成像协议中的固有差异除了异构图像特征之外还在两次采集之间产生了显著的非刚性变化。在这种情况下，我们在可变形配准过程中利用透射PET图像和发射PET图像两者，使用发射PET图像来强调移动透射PET图像的特定区域。我们使用M-Hausdorff距离相似性度量对9个大鼠图像集的结果进行了验证。我们证明了改进的性能相比，标准的方法，如恶魔和归一化互信息为基础的非刚性FFD注册。
We present a new registration method for whole-body rat computed tomography (CT) image and positron emission tomography (PET) images using a weighted demons algorithm. The CT and PET images are acquired in separate scanners at different times and the inherent differences in the imaging protocols produced significant nonrigid changes between the two acquisitions in addition to heterogeneous image characteristics. In this situation, we utilized both the transmission-PET and the emission-PET images in the deformable registration process emphasizing particular regions of the moving transmission-PET image using the emission-PET image. We validated our results with nine rat image sets using M-Hausdorff distance similarity measure. We demonstrate improved performance compared to standard methods such as Demons and normalized mutual information-based non-rigid FFD registration.