it's not a question of SNR, the problem appears to me to be that the B0
distortions are so bad that a bunch of the temporal lobe is piled up on top
of itself. There's no way to fix that posthoc. If you upload the full
volume I'm happy to take a look
On Wed, 14 Nov 2012, youngmin huh wrote:
I'm not engaged in obtaining images, so I don't have any details about the
images.I wonder the method which you commented can be applied to images I
already earned.
If it's not, is there any way to recover SNR after image scanning?
Thanks,
Youngmin Huh.
2012/11/13 Bruce Fischl <fis...@nmr.mgh.harvard.edu>
what is the bandwidth? The typical way to fix it is to increase
the bandwidth. You can probably recover some of the SNR you will
lose by reducing your flip angle, which is pretty far from the
Ernst angle.
Also, minimize your TE (if 4ms is not already the min)
cheers
Bruce
On Tue, 13 Nov 2012, youngmin huh wrote:
Hi,
3D SPGR sequences were used. (TR=22, TE=4,
thickness=1.4, FOV=240*240,
FA=40)
If the artifacts are due to B0 distortion, I wonder
how I can fix it.
Thanks,
Youngmin Huh
2012/11/12 Bruce Fischl <fis...@nmr.mgh.harvard.edu>
Can you give us the acquisition details? I
suspect this is not
noise, but rather B0 distortion.
what is the acquisition? And what bandwidth?
On Nov 8, 2012, at 2:53 AM, youngmin huh
<ymin1...@gmail.com>
wrote:
> Dear all,
>
> I'm working with some images, and they have
so much noises on
temporal areas.
> I just ran recon2, but not sure if they'll
be segmented
properly.
> Does anyone have a recommendation for
dealing with it?
> I wonder if there is any flag or option for
this occasion.
> I would appreciate any comments or help.
> I attached an example.
>
> Thanks,
>
> Youngmin Huh
> <temporal_001.jpg>
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