Dear experts,

I'm analyzing my fMRI data with FEAT using FSL 5.0. The FLIRT with BBR cost is used in the registration o EPI to structural image. For most of my data/sbjects, the processing is done successfully. However, for few subjects, the FLIRT step costs too much time (about 24 hours).

And I check the log, it only shows following information:

Initialisation

/usr/local/neurosoft/fsl5/bin/fslmaths /nfs/h2/fmricenter/volume/S0029/obj/002/func prefiltered_func_data -odt float
Total original volumes = 99

/usr/local/neurosoft/fsl5/bin/fslroi prefiltered_func_data example_func 49 1

/usr/local/neurosoft/fsl5/bin/mainfeatreg -d /nfs/h2/fmricenter/volume/S0029/obj/002/func.feat -l /nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/logs/feat5_reg -R /nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/report_unwarp.html -r /nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/report_reg.html  -i /nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/example_func.nii.gz  -h /nfs/h2/fmricenter/volume/S0029/3danat/reg/T1_brain -w  BBR -x 90
Option -d ( output directory ) selected with  argument "/nfs/h2/fmricenter/volume/S0029/obj/002/func.feat"
Option -l ( logfile )input with argument "/nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/logs/feat5_reg"
Option -R ( html unwarping report ) selected with  argument "/nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/report_unwarp.html"
Option -r ( html registration report ) selected with  argument "/nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/report_reg.html"
Option -i ( main input ) input with argument "/nfs/h2/fmricenter/volume/S0029/obj/002/func.feat/example_func.nii.gz"
Option -h ( high-res structural image ) selected with  argument "/nfs/h2/fmricenter/volume/S0029/3danat/reg/T1_brain"
Option -w ( highres dof ) selected with  argument "BBR"
Option -x ( highres search ) selected with  argument "90"

I don't know what's wrong with this processing, it it normal?

Hope for help.

Thanks in advance.

Best,

Lijie Huang

Beijing Normal University