Online agglomerative hierarchical clustering of neural fiber tracts.
Online agglomerative hierarchical clustering of neural fiber tracts.
复制标题
神经纤维束的在线凝聚层次聚类。
DOI:
10.1109/embc.2013.6609443
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Cetingül,HErtan
中科院分区:
文献类型:
--
作者:
Demir,Ali;Mohamed,Ashraf;Cetingül,HErtan
We consider the problem of clustering neural fiber pathways, produced from diffusion MRI data via tractography, into different bundles. Existing clustering methods often suffer from the burden of computing pairwise fiber (dis)similarities, which escalates quadratically as the number of fiber pathways increases. To address this challenge, we adopt the scenario of clustering data streams into the fiber clustering framework. Specifically, we propose to use an online hierarchical clustering method, which yields a framework similar to doing clustering while simultaneously performing tractography. We evaluate the proposed method through experiments on phantom and real diffusion MRI data. Experiments on phantom data evaluate the sensitivity of our method to initialization and show its superior performance compared with alternative methods. Experiments on real data demonstrate the accuracy in clustering selected white matter fiber tracts into anatomically consistent bundles.