Hi, this really depends on the image quality in the cerebellum, most
importantly: the resolution and contrast. In most images the resolution
does not support decent segmentation of much of the cerebellum, i.e. you
have too much partial voluming. The use of priors is unlikely to give a
useful aid to the problem sadly - this really needs fixing in the
acquisition!
Cheers, Steve.
On Thu, 8 Sep 2005, Ruth Hewson wrote:
> Hi, We're having trouble getting good segmentation at the level of the
> cerebellum. We've tried priors but for some images the cerebellum still
> comes out as almost all white matter, while the rest of the brain looks
> fine. Any suggestions of how to improve this? Many thanks,
>
> Ruth
>
> ------------------------------------
> Ruth Hewson
> Department of Psychiatry
> Douglas House
> Trumpington Road
> Cambridge
> CB2 2AH
> 01223 746194
>
--
Stephen M. Smith DPhil
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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