Hi,
are you sure about the timings? For even slice numbers on Numaris4 I would expect something like:
2 4 6 8 10 12 14 16 18 1 3 5 7 9 11 13 15 17
as the excitation order. The image numbering is indicated by sSliceArray.ucImageNumbSag. The direction the excitation progresses depends on the slice orientation (e.g. tra -> feet-to-head, sag -> right-to-left). So for uneven slices (excitation order, for example, 1 3 5 2 4), you may be able to use the interleaved option of stc (but watch out that the direction of the slice acquisition in your DICOM and your NIFTI/ANALYZE files match!). If your slices were really acquired the way you describe you may use a slice order file but not the interleaved option itself.
Hope this helps-
Andreas
-----Ursprüngliche Nachricht-----
Von: FSL - FMRIB's Software Library im Auftrag von Friedemann Szymanowski
Gesendet: Di 24.01.2006 07:53
An: [log in to unmask]
Betreff: [FSL] slice timing?
Hi,
in my new experiment I used a Siemens TRIO 3T MR-Scanner. The slice
timings for 18 slices (TR=3.5) are:
slice_time: 1750
slice_time: 0
slice_time: 1944.44
slice_time: 194.444
slice_time: 2138.88
slice_time: 388.888
slice_time: 2333.33
slice_time: 583.332
slice_time: 2527.77
slice_time: 777.776
slice_time: 2722.22
slice_time: 972.22
slice_time: 2916.66
slice_time: 1166.66
slice_time: 3111.1
slice_time: 1361.11
slice_time: 3305.55
slice_time: 1555.55
Can I use the interleaved option in FSL slice time correction, or should
I use a slice timing file?
Cheers, Friedemann.
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