Hello,
I’m getting an unexpected error when attempting to concatenate a 4D DWI file with a 3D DWI file (or rather another 4D with only one B=0 volume)
I’m starting from a 3D B=0 volume, which I first convert to a 4D file using mrconvert:
mrconvert B0_3D.mif B0_4D.mif -axes 0,1,2,-1
(otherwise I get an error when attempting to concatenate with dwicat ([ERROR] Image "/media/user/SharedDisk/data/PTD/PTD01/DWI/B0_3D.mif" is not a 4D image series
)
When I then try concatenating with another 4D DWI file:
dwicat DWI.mif B0_4D.mif DWI_combined.mif
I get the following error:
dwicat: [ERROR] Number of lines in gradient table for image “/media/user/SharedDisk/data/PTD/PTD01/DWI/B0_4D.mif” (4) does not match number of volumes (1)
However, if I look at the gradient table, it has only one line:
mrinfo B0_4D.mif -dwgrad
0 0 0 0
It seems dwicat is looking at the wrong dimension of the gradient table when checking for 4D files with only one volume
Cheers
Julien
OS: Ubuntu 16.04
MRtrix3* version: 3.02-193-gd63cc20