Hey, I think what you need is fslroi, you can use it make a new 4d volume containing 923 volumes from tne old one.
fslroi - extract region of interest (ROI) from an image. You can a) take a 3D ROI from a 3D data set (or if it is 4D, the same ROI is taken from each time point and a new 4D data set is created), b) extract just some time points from a 4D data set, or c) control time and space limits to the ROI. Note that the arguments are minimum index and size (not maximum index). So to extract voxels 10 to 12 inclusive you would specify 10 and 3 (not 10 and 12).
I think the way you want to use it as follows
Fslroi (filename) (new filename) 0 -1 0 -1 0 -1 0 294.
Regards,
Ahmed Radwan
Dear FSL
I have a 3D functional time series containing 937 volumes. I need to trim off the last 14 volumes to give me a time series of 923 volumes before I model my data in feat. I wish to do this as I don't want the last 14 volumes to become part of my implicit baseline when I model my events.
Is there a tool in FSL to trim off these end volumes?
Many thanks,
Liam.