Can I check if it is oblique or not?

Coz all the EPI were acquired in axial direction.
and I checked the EPIs with mri_info or avwhd, the primary slice direction is AXIAL, so I thought that they were all acquired in cardinal direction.


jackie% mri_info run1.nii
Volume information for run1.nii
type: nii
dimensions: 64 x 64 x 26 x 512
voxel sizes: 4.0000, 4.0000, 4.6000
type: SHORT (4)
fov: 64.000
dof: 0
xstart: -32.0, xend: 32.0
ystart: -32.0, yend: 32.0
zstart: -13.0, zend: 13.0
TR: 2500.00 msec, TE: 0.00 msec, TI: 0.00 msec, flip angle: 0.00 degrees
nframes: 512
ras xform present
xform info: x_r = -1.0000, y_r = -0.0000, z_r = -0.0000, c_r = 0.0000
: x_a = -0.0000, y_a = -0.9893, z_a = -0.1461, c_a = 9.1555
: x_s = 0.0000, y_s = -0.1461, z_s = 0.9893, c_s = 18.5465
Orientation : LPS
Primary Slice Direction: axial

voxel to ras transform:
-4.0000 -0.0000 -0.0000 128.0000
-0.0000 -3.9571 -0.6720 144.5182
0.0000 -0.5843 4.5507 -21.9133
0.0000 0.0000 0.0000 1.0000

voxel-to-ras determinant 73.6

ras to voxel transform:
-0.2500 0.0000 0.0000 32.0000
0.0000 -0.2473 -0.0365 34.9417
-0.0000 -0.0318 0.2151 9.3022
0.0000 0.0000 0.0000 1.0000