Hi,
i dont get, why a black and a white 'voxel' (low ad high intensity) are
clustert with same probability...
Maybe it is neighborhood connected but there is such 'high edge', that
there cant be a connected area...
After the newest Version of fast isnt it possbile to use it to segment
other things instead of WM GM and CSF in a brain extracted Image?
canīt i segment a Volume into 2 classes anymore?
Greetings
Oliver
Mark Jenkinson schrieb:
> Hi,
>
> Have you tried modifying the number of iterations (-I) the
> spatial MRF (-H) or the bias field smoothing (-l) ?
> These parameters can all have a strong effect (as can some
> of the other parameters too, but I'd start with the ones above).
>
> It will help if you can identify what you think is going wrong.
>
> Does the bias field look OK? It shouldn't show visible anatomical
> detail, and the restored image should have a nicer histogram.
>
> Are the results too smooth (decreasing -H might help) or maybe
> not smooth enough (increase -H)?
>
> Also - have you done brain extraction with BET? This is essential
> for getting good results.
>
> Finally, are you looking at the hard segmentations of the PVEs?
> It is the PVEs that we recommend as the most useful outputs,
> and these can look different than the hard segmentations around
> the boundaries.
>
> All the best,
> Mark
>
>
>
>
>
> On 24 Jan 2009, at 11:40, Oliver Trebbe wrote:
>
>> Hello ,
>>
>> after i tried my method with the new FAST version, but the results
>> are bad!
>> so i suggesting using the old FAST version. (dont know what exactly
>> changed, but the stuff im segmenting is bad clustert, not like id
>> wanted it or guessed it..)
>>
>> So far
>>
>> --
>> Oliver Trebbe
>> Department of Neurology
>> University of Muenster
>> 48129 Muenster, Germany
>>
>
--
Oliver Trebbe
Department of Neurology
University of Muenster
48129 Muenster, Germany
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