Uploading the data would be great, thanks,
Matthew
> On 13.09.2007, at 17:39, Matthew Webster wrote:
>
>> We've now fixed this bug in fast4 - the corrected version will be
>> in the next patch - coming soon!
>
> We've now retried the fast4 T1/T2/prior-probabilities segmentation
> with FSL-4.0.2, and while there are no crashes any more, things
> still do not work right: The whole brain gets classified as tissue
> one, like in a brain mask.
>
> The only hint are a lot of NaN values in the log messages:
>
>> Beginning prior-based initialisation
>> Tanaka Iteration 0 bias field 4
>> CHANNEL 1 CLASS 1 MEAN 1 STDDEV nan CLASS 2 MEAN 1 STDDEV nan
>> CLASS 3 MEAN inf STDDEV nan
>> CHANNEL 2 CLASS 1 MEAN 1 STDDEV nan CLASS 2 MEAN 1 STDDEV nan
>> CLASS 3 MEAN 1 STDDEV nan
>> Tanaka Iteration 1 bias field 4
>> CHANNEL 1 CLASS 1 MEAN nan STDDEV nan CLASS 2 MEAN nan STDDEV nan
>> CLASS 3 MEAN nan STDDEV nan
>
> The command we used was
>> fast4 --verbose -o fast4mmpp/AKYY_1_seg --outbias -a identity.mat
>> --segments -S 2 AKYY_1_t1_brain_std AKYY_1_t2_brain_std
>
> Should I upload the data for you to have a look?
>
>
> Regards,
> Timm Wetzel
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