TR/TE/TI: 1900/3.41/900
ms; FA: 9°; FOV: 210x240 mm2;
224x256 matrix; slice thickness: 0.94 mm;
160/176 slices; voxel size: 0.94x0.94x0.94 mm3; 180 Hz/pixel receiver bandwidth
Hi Gergely,
I think this will be trouble. I'll cc Andre van der Kouwe, but for the 3D
acquisitions, if you have a bigger field of view is has an effect on image
SNR, so that will be a bias between your groups.
cheers
Bruce
On Thu, 20 Jan 2011, Gergely Orsi wrote:
> Hi Freesurfers,
>
> I have a quick question:
>
> I have two groups, both measured on the same scanner, with the same sequence
> (3D MPRAGE), and with almost
> the same parameters.
>
> TR/TE/TI/BW/MATRIX/FOV/FOV-phase/Flip angle/Slice thickness/in-plane
> resolution... everything is the same, but the number of slices.
> Total measurement time was also the same.
>
> One group was measured with 160 slices, the other with 176.
>
> Can I compare the two groups in freesurfer?
>
> Thanx,
>
>
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
http://www.partners.org/complianceline . If the e-mail was sent to you in error
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.