Voxel-based Bayesian lesion-symptom mapping.
Voxel-based Bayesian lesion-symptom mapping.
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DOI:
10.1016/j.neuroimage.2009.07.061
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发表时间:
2010-01-01
期刊:
影响因子:
5.7
通讯作者:
Herskovits, Edward H.
中科院分区:
文献类型:
--
作者:
Chen, Rong;Herskovits, Edward H.
Most existing voxel-based lesion-symptom mapping methods are based on the same statistical foundation: null-hypothesis significance testing (NHST). The two major limitations of these methods are the inability to infer that there is no difference in lesion proportions, and a requirement for multiple-comparison correction. We propose a Bayesian approach that directly models the posterior distribution of lesion proportion difference, and makes decisions based on inference on this posterior distribution. Compared to NHST-based approaches, our Bayesian approach yields inference results with clearer semantics, and does not require multiple-comparison correction. We evaluated our Bayesian method using simulated data, and data from a study of acute ischemic left-hemispheric stroke. Results of both experiments indicate that the Bayesian approach is sensitive in detecting regions that characterize group differences.
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