May 2013

Segmentation failure for T1 coregistered to tilted fMRI

Submitted by cody on Fri, 05/03/2013 - 07:03

Hello some structural scans failed segmentation and normalization after coregistering to RS fMRI scans that had been tilted forward (30 degrees on the x axis to avoid inferior-frontal dropout).  We used the unified segmentation method.  It seems SPM may not be able to match the structural to the standardized tissue templates if the orientation differs a lot.  We were able to resolve the problem somewhat by reorienting the images.  Has anyone else experienced this? 

Forums: 
Resting-state fMRI topics

ALFF图像结果

Submitted by confirm on Fri, 05/03/2013 - 00:06

老师，您好！
最近搜集了10个被试的静息态数据，按照操作方法使用Basic DPARSF处理数据得到ALFF和fALFF数据，然后用rest viewer查看这组数据并做单样本t检验（alpha sim矫正p0.01），发现有两个问题，谢谢老师予以指导。
1）ALFF的图像（后附图），显示结果有点怪怪的，图中可见一大片的激活改变，而且正激活许多分布在脑池里请教老师为什么出现这个结果？是数据采集的问题还是其他原因造成的？这组数据还能用么？

Forums: 
Resting-state fMRI topics