Hi Rick,

Here is all of the content from 3dinfo:

Dataset File: double.subtraction.nii
Identifier Code: XYZ_VCJEp4TIC0umtB2fuBV6OQ Creation Date: Thu Sep 18 21:51:57 2008
Dataset Type: Anat Bucket (-abuc)
Byte Order: LSB_FIRST {assumed} [this CPU native = LSB_FIRST]
Storage Mode: NIFTI file
Storage Space: 16777216 (17 million) bytes
Geometry String: "MATRIX(2,0,0,-127,0,0,-2,127,0,2,0,-127):128,128,128"
Data Axes Tilt: Plumb
Data Axes Orientation:
first (x) = Right-to-Left
second (y) = Inferior-to-Superior
third (z) = Posterior-to-Anterior [-orient RIP]
R-to-L extent: -127.000 [R] -to- 127.000 [L] -step- 2.000 mm [128 voxels]
A-to-P extent: -127.000 [A] -to- 127.000 [P] -step- 2.000 mm [128 voxels]
I-to-S extent: -127.000 -to- 127.000 [S] -step- 2.000 mm [128 voxels]
Number of values stored at each pixel = 2
-- At sub-brick #0 '?' datum type is float: -1.1907 to 0.826943
-- At sub-brick #1 '?' datum type is float: -5.16984 to 3.47787

----- HISTORY -----
[jvaidya@james.psychiatry.uiowa.edu: Thu Sep 18 21:51:57 2008] 3dttest -prefix double.subtraction.nii -set1 r115fear_min_neutral_emot_min_gend.nii r122fear_min_neutral_emot_min_gend.nii r130fear_min_neutral_emot_min_gend.nii r133fear_min_neutral_emot_min_gend.nii r135fear_min_neutral_emot_min_gend.nii r138fear_min_neutral_emot_min_gend.nii r139fear_min_neutral_emot_min_gend.nii r140fear_min_neutral_emot_min_gend.nii r141fear_min_neutral_emot_min_gend.nii r148fear_min_neutral_emot_min_gend.nii r153fear_min_neutral_emot_min_gend.nii r157fear_min_neutral_emot_min_gend.nii r159fear_min_neutral_emot_min_gend.nii r161fear_min_neutral_emot_min_gend.nii r163fear_min_neutral_emot_min_gend.nii r187fear_min_neutral_emot_min_gend.nii r199fear_min_neutral_emot_min_gend.nii r202fear_min_neutral_emot_min_gend.nii r203fear_min_neutral_emot_min_gend.nii r204fear_min_neutral_emot_min_gend.nii
-set2
r106fear_min_neutral_emot_min_gend.nii r107fear_min_neutral_emot_min_gend.nii r109fear_min_neutral_emot_min_gend.nii r110fear_min_neutral_emot_min_gend.nii r111fear_min_neutral_emot_min_gend.nii r113fear_min_neutral_emot_min_gend.nii r117fear_min_neutral_emot_min_gend.nii r120fear_min_neutral_emot_min_gend.nii r121fear_min_neutral_emot_min_gend.nii r123fear_min_neutral_emot_min_gend.nii r125fear_min_neutral_emot_min_gend.nii r126fear_min_neutral_emot_min_gend.nii r128fear_min_neutral_emot_min_gend.nii r129fear_min_neutral_emot_min_gend.nii r131fear_min_neutral_emot_min_gend.nii r132fear_min_neutral_emot_min_gend.nii r165fear_min_neutral_emot_min_gend.nii r179fear_min_neutral_emot_min_gend.nii