Hello-

I realized I had made a labeling error and ommitted the last section of the analysis in my last post (sorry about that!). following is the correct information. i still do not know if this will make any difference in the overall analyses

FWHM for original data (4 x 4 x 5 )

Program: 3dFWHM
Author: B. Douglas Ward
Initial Release: 20 February 1997
Latest Revision: 08 March 2004

count=17745
var =15355.637695
varxx=15505.972656 varyy=11580.620117 varzz=19237.478516
sx=2.385375 sy=2.906996 sz=2.519521


Gaussian filter widths:
sigmax = 2.39 FWHMx = 5.62
sigmay = 2.91 FWHMy = 6.85
sigmaz = 2.52 FWHMz = 5.93

FWHM for resampled data (1 mm cubed) with NN

Program: 3dFWHM
Author: B. Douglas Ward
Initial Release: 20 February 1997
Latest Revision: 08 March 2004

count=1419600
var =15354.784180
varxx=3909.888916 varyy=2953.261475 varzz=3938.596436
sx=1.354897 sy=1.572427 sz=1.349597


Gaussian filter widths:
sigmax = 1.35 FWHMx = 3.19
sigmay = 1.57 FWHMy = 3.70
sigmaz = 1.35 FWHMz = 3.18

FWHM for original data with 4 MM blur

Program: 3dFWHM
Author: B. Douglas Ward
Initial Release: 20 February 1997
Latest Revision: 08 March 2004

count=17745
var =12448.405273
varxx=6534.217285 varyy=4994.674316 varzz=9379.696289
sx=3.624854 sy=4.226595 sz=3.635826


Gaussian filter widths:
sigmax = 3.62 FWHMx = 8.54
sigmay = 4.23 FWHMy = 9.95
sigmaz = 3.64 FWHMz = 8.56

AVE = 9.01

and finally the resampled data with the same kernel

Program: 3dFWHM
Author: B. Douglas Ward
Initial Release: 20 February 1997
Latest Revision: 08 March 2004

count=1419600
var =13524.453125
varxx=344.937805 varyy=359.661743 varzz=382.955139
sx=4.413497 sy=4.321614 sz=4.187207


Gaussian filter widths:
sigmax = 4.41 FWHMx = 10.39
sigmay = 4.32 FWHMy = 10.18
sigmaz = 4.19 FWHMz = 9.86

AVE = 10.14

These differences did become smaller with a larger kernel (8 MM)- thanks!