Hello Antonio,
Le 30 avr. 2012 à 19:31, Antonio Algaze a écrit :
> Hello all,
>
> I would appreciate it if someone with an Achieva system could please share what type of acquisition they have found to work best for generating input for "fieldmap".
Currently, I use a standard multiple gradient echoes sequence, to get several echoes with a single acquisition. It is parameterized to share geometry parameters (FOV, resolution, slice thickness, number of slices, orientation) with the EPI to be corrected for distortion. I prefer to use gradient echo times where water and fat get in phase, and in practice I use the first (with rather short TE) and third echo images.
Hope this helps…
Laurent
>
> Many thanks in advance.
>
> Antonio Algaze
> University of Puerto Rico
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Laurent LAMALLE, Dr Sc.
Ingénieur de Recherche INSERM
SFR1 RMN Biomédicale et Neurosciences
Unité IRM Recherche 3 Tesla
CHU de Grenoble
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France
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