Hi David,
Ok, many thanks, there is indeed a difference between the original and
denoised data.
Best,
Anders
2013/11/6 David V. Smith <[log in to unmask]>:
> Hi Anders,
>
> I don't think you should expect the file size to change. Have you compared
> the original and the denoised data using fslmaths?
> for example: fslmaths original_data -sub denoised_data diff_data
>
> If diff_data.nii.gz is empty (i.e., all 0s), then yes, it would seem that
> FIX did nothing to your data.
>
> Cheers,
> David
>
>
> On Nov 5, 2013, at 11:54 AM, Anders Hougaard wrote:
>
> ...so I got it all wrong then? :)
>
> 2013/11/5 Anders Hougaard <[log in to unmask]>:
>
> Hi Steve,
>
>
> Thanks for your quick answer.
>
> Well, my intuitive understanding of how this program works is probably
>
> wrong, but I thought that the "bad component" data would be removed
>
> from the orginal data causing the output to be smaller. I also thought
>
> that the data would look less noisy on visual inspection in FSLview
>
> but this is does not seem to be the case either.
>
>
> Best,
>
> Anders
>
>
>
>
>
>
> 2013/11/5 Stephen Smith <[log in to unmask]>:
>
> Hi Anders
>
>
> On 5 Nov 2013, at 15:53, Anders Hougaard <[log in to unmask]> wrote:
>
>
> Dear all,
>
>
> I am using FSL FIX to "clean" my resting state data.
>
> I created my own training data as described in the manual and ran FIX
>
> on the rest of my data using this. Everything seems to be fine but I
>
> can't tell the difference between the original filtered_func_data in
>
> my .ica directory and the filtered_func_data_clean output. I would
>
> have expected the cleaned files to be smaller
>
>
>
> Why?
>
>
> Cheers, Steve.
>
>
> but they are exactly the
>
> same size.
>
> The fix4melview files seem ok.
>
> Is something going wrong here?
>
>
> Best,
>
> Anders
>
>
>
>
> ---------------------------------------------------------------------------
>
> Stephen M. Smith, Professor of Biomedical Engineering
>
> Associate Director, Oxford University FMRIB Centre
>
>
> FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
>
> +44 (0) 1865 222726 (fax 222717)
>
> [log in to unmask] http://www.fmrib.ox.ac.uk/~steve
>
> ---------------------------------------------------------------------------
>
>
> Stop the cultural destruction of Tibet
>
>
>
>
>
>
> --------------------------------------------
> David V. Smith, Ph.D.
> Postdoctoral Fellow, Delgado Lab
> Department of Psychology
> Rutgers University
> Newark, NJ 07102
> --------------------------------------------
>
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