Did you run qcache after installing the new version of preproc-sess? The new version has a "jacobian" correction needed to make the area and volume computations meaningful. If you have not installed the patch, you can get it from here:
ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/preproc-sess
doug
On 11/14/2012 12:37 PM, Mahinda Yogarajah wrote:
Dear Experts, Given that volume is area x thickness, how would one explain significant reductions in volume in a qdec anaysis comparing patients and controls, but not significant differences in area or thickness in the same regions where volume differences are seen. All analyses use the same parameter settings. Thanks. Mahinda
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