I'm trying to figure out the simultaneous-multi-slice (SMS) factor for my MR acquisition, to use during slice-timing correction, in SPM12.

The DICOM header obtained during conversion (with the Matlab script dicom_sort_convert_main) is a mess, and the only variable that sounds like it could be the SMS, is: sKSpace.ucMultiSliceMode=2.

Assuming the total number of slices is nSlices=64, is it then correct that my reference slice should be the 16th one (i.e. divide nSlices by 2 to get the mid-slice, and by SMS=2 again) ? And that it is the timing of this mid-slice (irrespective of what the TR was), that I should use as a reference, in the SliceTimingCorrection SPM batch?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.