Dear FSL-Experts,
after running dtifit without any error message my FA-map is
all white. This has been discussed on the list before but I think
that I`ve got a different problem than the one(S) discussed earlier.
To avoid the most common errors I
1.) used the "dos2unix" command to remove carriages returns added by
evil Windows and checked the output using the "cat -v" argument.
2.) made sure that my bvals and bvecs also comprise the no-diffusion
data (in a column-wise fashion) and that the files are without any
extension (e.g. txt)
3.) checked that the bvec-file is showing no repetitions of
gradietens
4.) run the Diffusion-Toolkit in combination with Trackvis to make
sure that the gradient scheme gives reasonable results (and is does)
6.) took a look at the "eddy current" output and my brain mask that
look fine
7.) checked my data with bedpostx_datacheck which gave me the
following results:
/home/stendal/rhilgens/X/data.../data
data_type INT16
dim1 110
dim2 110
dim3 64
dim4 76
datatype 4
pixdim1 2.2000000477
pixdim2 2.2000000477
pixdim3 2.2000000477
pixdim4 1.0000000000
cal_max 0.0000
cal_min 0.0000
file_type NIFTI-1+
/home/stendal/.../nodif_brain_mask
data_type FLOAT32
dim1 110
dim2 110
dim3 64
dim4 1
datatype 16
pixdim1 2.2000000477
pixdim2 2.2000000477
pixdim3 2.2000000477
pixdim4 1.0000000000
cal_max 0.0000
cal_min 0.0000
file_type NIFTI-1+
num lines in /home/fsl/Desktop/MM_T2//bvals
1
num words in /home/fsl/Desktop/MM_T2//bvals
76
num lines in /home/fsl/Desktop/MM_T2//bvecs
3
num words in /home/fsl/Desktop/MM_T2//bvecs
228
And still my FA-map is all white with a value of 1. I`m a little
lost (and desperate) here and would appreciate any help on this. As
the bvecs and bvals-files are small I attached them.
Thanks in advance and best regards
Raphael H.
___________________________________________
Dipl.-Psych., cand.med. Raphael Hilgenstock
Klinik für Neurologie
Erlanger Allee 101
07747 Jena
Tel: +49 3641 543514
