The simplest thing to do is provide oxford_asl with your data as the tag-control differences at your 8 TIs having taken the mean over all the repeats within each TI. The exact command you want will depend upon what order things are in your current data, perhaps you can provide more details on that?
Michael
On 31 Mar 2013, at 12:35, Inge R. Groote <[log in to unmask]> wrote:
> Hi, Experts!
>
> Attempting to move all ASL analysis steps to FSL, I am currently struggling with sorting multi-TI ASL images before piping it into oxford_asl, but with remarkably little success.
>
> My data is Philips, 13 slices, 8 Tis, read out with 2D EPI. The format thus differs from the 3D-GRASE images in the BASIL tutorial concerning the exact asl_file commands. I am trying to generate the difference images, but can only generate numerous wrongful suggestions. I have tried most permutations of commands, but obviously not the correct one...
>
> I have successfully sorted and subtracted the data using other softwares, thus the data itself is valid.
>
> Any good tips on how to proceed?
>
> Kind regards
>
> Dr. I. Groote
> Norway
>
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