Submitted by farras on Wed, 01/09/2013 - 01:10
In the following lines, what does SliceOrder refer to? is it the order of slices from the first slice to the total number of slices? And what is the role of ReferenceSlice?
AutoDataProcessParameter.SliceTiming.SliceOrder=[1:2:239,2:2:240]; % REVISIT.... was [1:2:25,1:2:24]
AutoDataProcessParameter.SliceTiming.ReferenceSlice=25;
With thanks,
farras
Submitted by ZHANG_RESTadmin on Thu, 01/10/2013 - 03:24 Permalink
Re: Question on setting parameters
Hi Farras,
No I think you misunderstand what the "slice" means. It means how many pieces of slices that contains in a brain volume you collect from a MRI scanner at one time (within a single TR). Therefore, the order of slices is the way how, let's say, 33 slices scanned within a TR. Basically it should be interleaved, but not always the case. So if you get an fMRI dataset with 33 slices in a brain volume, this should be 1:2:33 2:2:32 if you got them in a interleaved manner. The reference slice is the slice you wanna other slices temporally registered to. It's suggested to be the one you got at the middle time point (slice #33 in this example).
Hope you get it.
Han
Submitted by farras on Thu, 01/10/2013 - 05:07 Permalink
Re: Question on setting parameters
Thank you for the clarification, I indeed misunderstood what "slice" meant. One more quetion, how do I determine the number of slices in one RT?
Thanks!
Submitted by YAN Chao-Gan on Sun, 01/13/2013 - 12:08 Permalink
Re: Question on setting parameters
Open the file with MRIcroN, you can get the information from "Window"->"Information".