Hi,
I'm new with fsl, and have just installed fsl on my Ubuntu.
I'm trying to use mfast, have used Bet to extract out non-tissue, but in a
most cases, I get the error-message. I'm using mfast on a t1 and a t2 picture.
/usr/share/fsl/bin/mfast -s 2 -c 3 -od
/media/LaCie/NIFTI-format/Dykkar_Bo_nei/Dykkar_Bo_brain
/media/LaCie/NIFTI-format/Dykkar_Bo_nei/Dykkar_Bo_brain
/media/LaCie/NIFTI-format/Dykkar_Bo_nei/Dykkar_Bo2_brain.nii.gz
No convergence in 30 SVDCMP iterations
MFAST - Multispectral FAST Version 3.53
Channel 0: /tmp/fsl_ASbhq4_Dykkar_Bo
Channel 1: /tmp/fsl_ASbhq4_Dykkar_Bo2
Imagesize : 256 x 256 x 19
Pixelsize : 0.898438 x 0.898438 x 6.65
Slice is too thick, 2D segmentation will be performed!
initial segmentation by KMeans....
4 main iterations ...
Matrix Inverse: Not invertable!
Finished
In the rest of the cases I get
/usr/share/fsl/bin/mfast -s 2 -c 3 -od
/media/LaCie/NIFTI-format/Dykkar_Df/Dykkar_Df_brain
/media/LaCie/NIFTI-format/Dykkar_Df/Dykkar_Df_brain
/media/LaCie/NIFTI-format/Dykkar_Df/Dykkar_Df2_brain.nii.gz
313577.5 681402.9 485882.3 1480862.8
MFAST - Multispectral FAST Version 3.53
Channel 0: /tmp/fsl_5nFAIf_Dykkar_Df_brain
Channel 1: /tmp/fsl_5nFAIf_Dykkar_Df2_brain
Imagesize : 256 x 256 x 19
Pixelsize : 0.898438 x 0.898438 x 6.65
Slice is too thick, 2D segmentation will be performed!
initial segmentation by KMeans....
4 main iterations ...
Segmentation done successfully!
Calculation time 51 seconds!
Write segmentation image /tmp/fsl_5nFAIf.fastout/QQQQQ_seg.hdr Successfully!
Class: tissue 0 tissue 1 tissue 2 total
Volume:
Finished
Do you have any idea what I can do to fix this? I ran the fsl evaluation,
and it said that the tests passed. I think maybe there might be something
wrong with the brain extraction, cause when I tried to use an another
computer with mfast, it all worked out fine.
Thanks,
Hege
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