Hi Leonardo,

we need more details about your acquisition. What sequence with what parameters? What type of scanner? Was there any prescan normalization? Which 8 channel coil did you use and do you have access to other coils?

cheers Bruce On Wed, 14 Apr 2010 chesi.leonardo@alice.it wrote:

Hi, I'm Leonardo an italian student of Pisa. I'm writing to you to ask if there's any way to correct this problem: we have a 3.0T machine with a 8 channels head coil to acquire the volumetric image. we have found a big inhomogeneity in the contrast of the image particularly in the frontal lobe where, so we think, the head is influenced by a inhomogeneity of the B0. I'm going to ask to you if there's any normalization way of this image because when I execute the recon-all command I foud many segmentation errors in this zone. Thaks for your help Greetings Leonardo