Diff for "CbuSliceTiming" - MRC CBU Imaging Wiki
location: Diff for "CbuSliceTiming"
Differences between revisions 3 and 4
Revision 3 as of 2007-05-16 21:45:16
Size: 1092
Editor: host81-159-94-174
Revision 4 as of 2007-05-16 21:55:11
Size: 1180
Editor: l18
Deletions are marked like this. Additions are marked like this.
Line 8: Line 8:
P = spm_select; P = spm_select(Inf, 'image', 'Select files to slice time correct');
Line 10: Line 10:
sliceorder = [1:2:nslices 2:2:nslices]; sliceorder = [1:2:nslices 2:2:nslices]; % interleaved ascending acquisition

Cbu slice timing routines

This is just a modified version of the spm slice timing routines that allows you to use other methods of interpolation for slice timing - see SliceTiming.

The routine is attachment:mb_5_slice_timing.m It is installed in the CBU in the /imaging/local/spm/common directory. You could use it like this:

P = spm_select(Inf, 'image', 'Select files to slice time correct');
nslices = 16; % number of slices
sliceorder = [1:2:nslices 2:2:nslices]; % interleaved ascending acquisition
refslice = 1; % slice for timing reference
slicetime = 0.115; % time to acquire one slice
TR = 2.02726;
timings = [slicetime slicetime+(TR-slicetime*nslices)];
mb_5_slice_timing(P, sliceorder, refslice, timings);

Which would reproduce the standard SPM sinc slice timing.

For linear slice timing - do all the same up to:

mb_5_slice_timing(P, sliceorder, refslice, timings, 'linear', 'la');

This will generate linear slice timing files with an la prefix. You should delete the first, and probably the last volume in the series for liner slice timing, as it will have been interpolated with missing data.


CbuImaging: CbuSliceTiming (last edited 2013-03-07 21:24:08 by localhost)