Dear Experts,
I try to perform q-ball analysis on DWI.
I first process the data with bedpost and whener I launch: " qboot -k data -m nodif_brain_mask -r bvecs -b bvals", I get the following message:
[habas@HABAS QBALL_DFC_MIX_0016.bedpostX]$ qboot -k data -m nodif_brain_mask -r bvecs -b bvals
Log directory is: logdir+
Multiple b-values have been detected. Three shells are assumed, acquired one after the other!
Mean b-values for detected shells are 350, 650 and 2996.67
At least one b=0 image is required! Exiting now!
Do you know what to do and where is the b=0 image?
Many thanks.
Best,
Christophe
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