头动被试的处理方法

Submitted by Louise on Mon, 05/20/2013 - 10:34

各位老师好！最近在处理一批病人的数据，头动较大（放宽至3mm和3°）的被试比较多，但是被试的总体数量又比较少。想请问一下各位老师有没有对头动的被试的处理的方法。
暂时有两个想法：1.去掉头动较大的时间点。2.不去头动的被试，最后将头动作为协变量去掉。暂时只是这样想，还没有找到文献的依据，不知道具体可不可行，还请老师指点，多谢！

Forums: 
Resting-state fMRI topics

Global mean regression removes all voxels?

Submitted by nertman on Sat, 05/18/2013 - 01:25

Hi, I have been using DPARSFA for preprocessing and it has been working very well so far. I tried to remove the Global Signal nuisance regressor, but after doing so my data has no voxels left -- i.e., when I enter it into a first-level model in SPM, and estimate the model, I get this popup message:
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No inmask voxels - empty analysis!
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Forums: 
Resting-state fMRI topics