... as a follow up to Stan's post: I usually acquire my fieldmap with
the same slice prescription as the functionals, but Chloe mentioned once
that the fieldmap is refitted to the EPI grid anyway. So using the same
slices may reduce interpolation but does not seem to be critical.
Cheers,
Marko
Stan Hrybouski wrote:
> You have to ask your MR tech to send you this info (TEs from gradient
> echo images that are used to create a phase difference image, eco
> spacing, phase encode direction, etc...) Siemens produces a document
> with all the parameter scans. GE should have something similar.
> Stan
>
> On Wed, Oct 24, 2012 at 12:35 PM, Sepeta, Leigh
> <[log in to unmask] <mailto:[log in to unmask]>>
> wrote:
>
> Hi All,____
>
> __ __
>
> What are the appropriate parameters (i.e., TEs, TR, phase encoding
> direction, etc) for creating a field map scan on a GE 3T scanner to
> be used later to correct EPI distortions? Also, should the field map
> be the exact dimension/slices as the EPI images?____
>
> __ __
>
> Thank you in advance for any help that you can provide!____
>
> __ __
>
> -Leigh ____
>
> __ __
>
> __ __
>
>
--
____________________________________________________
PD Dr. med. Marko Wilke
Facharzt für Kinder- und Jugendmedizin
Leiter, Experimentelle Pädiatrische Neurobildgebung
Universitäts-Kinderklinik
Abt. III (Neuropädiatrie)
Marko Wilke, MD, PhD
Pediatrician
Head, Experimental Pediatric Neuroimaging
University Children's Hospital
Dept. III (Pediatric Neurology)
Hoppe-Seyler-Str. 1
D - 72076 Tübingen, Germany
Tel. +49 7071 29-83416
Fax +49 7071 29-5473
[log in to unmask]
http://www.medizin.uni-tuebingen.de/kinder/epn/
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