GROUP ACTION INDUCED AVERAGING FOR HARDI PROCESSING.
GROUP ACTION INDUCED AVERAGING FOR HARDI PROCESSING.
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DOI：
10.1109/isbi.2012.6235827
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Vidal R
中科院分区：
文献类型：
--
作者：
Cetingül HE;Afsari B;Wright MJ;Thompson PM;Vidal R
我们考虑的问题，处理高角分辨率的扩散图像描述的方向分布函数（ODF）。先前的工作表明，几个处理操作，例如，平均、内插和滤波可以简化为在ODF空间中的平均。然而，当待处理的ODF具有非常不同的取向时，这种方法导致解剖学上错误的结果。为了解决这个问题，我们提出了一个组动作诱导的距离平均ODF，这导致了一个新的处理框架上的空间的方向（空间的3D旋转）和形状（空间的ODF具有相同的方向）。实验表明，我们的框架产生解剖学上有意义的结果。
We consider the problem of processing high angular resolution diffusion images described by orientation distribution functions (ODFs). Prior work showed that several processing operations, e.g., averaging, interpolation and filtering, can be reduced to averaging in the space of ODFs. However, this approach leads to anatomically erroneous results when the ODFs to be processed have very different orientations. To address this issue, we propose a group action induced distance for averaging ODFs, which leads to a novel processing framework on the spaces of orientation (the space of 3D rotations) and shape (the space of ODFs with the same orientation). Experiments demonstrate that our framework produces anatomically meaningful results.