Yes I did. So I had 244 volumes for each run.
Thanks for your help.
Cecile
John Ashburner a écrit :
> Are you selecting all volumes within each 4D file, or just the first? In the
> file selector, there is a field where you can enter (e.g.) "1:1000" in order
> to allow volumes other then the first to be specified.
>
> Best regards,
> -John
>
> On Monday 12 January 2009 15:26, Cecile Bordier wrote:
>
>> Hi,
>> I am having some troubles during my realign & unwarp computation.
>> I am using matlab 7.6.0 with spm8b (last update). I got 6 runs of images
>> convert from dcm to nii with dcm2nii (visually everything looks ok).
>> I tried the realign & unwarp on my data with .nii extension (4D) and
>> img/hdr extension (3D and 4D).
>>
>> During the process (estimation) I got several of these :
>>
>> Warning: Matrix is singular, close to singular or badly scaled.
>> Results may be inaccurate. RCOND = NaN.
>> In spm_uw_estimate>make_q at 484
>> In spm_uw_estimate>make_ref at 766
>> In spm_uw_estimate at 370
>> In spm_run_realignunwarp at 89
>> In matlabbatch/private/cfg_run_cm at 29
>> In cfg_util>local_runcj at 1345
>> In cfg_util at 686
>> In cfg_ui>MenuFileRun_Callback at 1129
>> In gui_mainfcn at 96
>> In cfg_ui at 53
>> procedure terminated abnormally:
>> Error using ==> schur
>> Input to SCHUR must not contain NaN or Inf.
>>
>> #And finally I got this error message, I guess it is during the writing....
>> Failed 'Realign & Unwarp'
>> Reference to non-existent field 'beta'.
>> In file "/usr/local/etc/Matlab/toolbox/spm8b/spm_uw_apply.m" (v1358),
>> function "spm_uw_apply" at line 226.
>> In file
>> "/usr/local/etc/Matlab/toolbox/spm8b/config/spm_run_realignunwarp.m"
>> (v2337), function "spm_run_realignunwarp" at line 106.
>>
>> It seems that during the estimation the field beta is not computed for some
>> of my runs. Is it aborded because of the warning?
>> To check I tried to realize an estimate & reslice (without fieldmap
>> correction), everything is running well.
>>
>> I saw an email sent by Adam Jacks (in spm5) earlier this month with the
>> same kind of problem.... but no solution seems to be done.
>> Thanks
>>
>> Cécile
>>
>
>
--
*---------------------------------
Cécile Bordier
Grenoble Institut des Neurosciences -
Centre de Recherche INSERM U836 UJF-CEA-CHU
Equipe 5 : NeuroImagerie Fonctionnelle et Metabolique
Chemin Fortune Ferrini
Université J. Fourier - Site Santé
La Tronche
BP 170, 38042 Grenoble Cedex 9, France
Ph: +33 (0)4 56 52 06 03
Fax: +33 (0)4 56 52 05 98
email: [log in to unmask]
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