Dear expert.
I am getting into trouble with optimized VBM and T1 images of elderly
subjects. When hi-resoution (1.7 x 0.82 x 0.82mm voxel) images were
segmented, gray and csf are not properly segmented. Seg1 image appears to
include both grey and csf, and seg3 image has only outer brain tisssues.
Please see an attached jpeg image. Among 11 brains processed, the miss-
segmentation occured in four images. These four T1 images do not look very
difefrent from other properly segmented images.
Any help is very much appreciated.
Tetsuya Iidaka
Department of Psychiatry
Nagoya University
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