Re: [Teem-users] Tend epireg

[Sonia P. <sp...@bw...>]

Gordon and Thomas,

Thank you for your quick reply. I removed the field 'space units: "mm" 
"mm" "mm"'' from the Nrrd header, and got the same error with tend epireg.

I tried removing the field 'space directions: (1,0,0) (0,1,0) (0,0,2.6) 
none' and then tend epireg worked fine, but the space directions in the 
the corrected dwi volume  are set to 'none none none none'. Should I 
manually set the space directions to their initial values after running 
the distorsion correction?

I have attached the original 01-dwi.nhdr file.

Thanks again for your help,

Sonia

On 10/12/11 11:00 AM, Gordon L. Kindlmann wrote:
> The error message is saying something about the header:
>
> [ten] [nrrd] _nrrdFieldCheckSpaceInfo: axis[0] has a direction vector, and so can't have min, max, spacing, or units set
>
> If you look at the the header 01-dwi.nhdr, does it have "axis mins", "axis maxs", "spacings", or "units" fields that specify something for the first axis?
>
> If you aren't sure of the answer, you can forward the header to this list and we should be able to answer that.
>
> Gordon
>
> On Oct 12, 2011, at 9:56 AM, Sonia Pujol wrote:
>
>> Hi,
>>
>> I am working on a patient dataset, and I am interested in comparing the
>> tensors before and after distortion correction.
>>
>> I was able to compute the tensors with tend estim without any issue, but
>> when I try to use tend epireg I get the following error:
>>
>> tend epireg -i 01-dwi.nhdr -g kvp -f 0.65 -o 01-dwi-epi.nhdr
>> _tenEpiRegBlur:
>>               0 tend epireg: trouble doing epireg:
>> [ten] tenEpiRegister4D: trouble
>> [ten] tenEpiRegister3D: trouble blurring
>> [ten] _tenEpiRegBlur: trouble blurring ndwi[0]
>> [ten] [nrrd] nrrdSpatialResample: couldn't create float copy of input
>> [ten] [nrrd] nrrdConvert: trouble
>> [ten] [nrrd] clampConvert: invalid args
>> [ten] [nrrd] nrrdCheck: trouble
>> [ten] [nrrd] _nrrdCheck: trouble with space field
>> [ten] [nrrd] _nrrdFieldCheck_space: trouble
>> [ten] [nrrd] _nrrdFieldCheckSpaceInfo: axis[0] has a direction vector,
>> and so can't have min, max, spacing, or units set
>>
>>
>> Can you please let me know what I am doing wrong ?
>>
>> Thanks a lot,
>>
>> Sonia
>>
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-- 
Sonia Pujol, Ph.D.
Surgical Planning Laboratory, Harvard Medical School
Brigham and Women's Hospital, Boston, MA