Hi,
Maybe you're not using quite the same command in the two cases? It
works sensibly for me. If you can't work out what's going on feel free
to upload the file for us to have a look.
Cheers.
On 27 Mar 2009, at 18:29, Anastasia A Ford wrote:
> Hello,
>
> I have a question regarding % thresholding in fslmaths. I am trying to
> threshold a file so that that only 50% of the dynamic range of the
> values
> are left in the image, so i am using the following command line:
> fslmaths file name -thrP 50 file name
> When I look at the resulting image and compare it with the original
> file, I
> notice that the original file thresholded at 20 percent has less
> voxels than
> the 50% thresholded file. Could you explain why this might be
> happening?
>
> Sincerely,
>
> Anastasia
>
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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)
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