Hi Jose,
maybe I should be more specific on this: it was apart from my own
experience with PET and fMRI on similar paradigms just this talk that
confirmed my opinion that PET would be the adequate thing to do, since the
statistical correction did not seem to fully compensate for the
susceptibility artifacts. So my question was rather: does everybody agree
on the conclusions of this paper or are there procedures, post-processing
or other, such as shimming, choice of slices and angles, that have proven
effective in minimizing the problem to such an extent that fMRI is at
least as good as PET in scanning ventral temporal regions.
Peter
On Wed, 5 Jul 2000, Jose' Ma. Maisog wrote:
> Hi Peter, check out this abstract from the recent Human Brain Mapping
> conference in San Antonio. They used a post-processing statistical
> correction to minimize the effect of susceptibility artifact. Perhaps
> one of the authors can offer more advice.
>
> Devlin J, Russell R, Davis M, Price C, Wilson J, Matthews PM, Tyler L,
> "Susceptibility and Semantics: Comparing PET and fMRI on a Language
> Task," NeuroImage Volume 11, Number 5, May 2000, Part 2 of 2 Parts,
> S257.
>
>
> Joe.
>
>
> Peter Indefrey wrote:
> >
> > Dear SPM users,
> >
> > I'm currently considering the pros and cons of PET vs. fMRI for a language
> > paradigm with the inferior temporal lobes as the principal region of
> > interest. While my preference is PET , considering the known
> > susceptibility problems of fMRI in this region, I'd nonetheless like to
> > learn what can be done in fMRI to minimize (the effect of) magnetic field
> > inhomogeneities. Any suggestions?
> >
> > Peter
> >
> > *****************************************************************
> > | | |
> > | Dr. Peter Indefrey | Phone +31-24-3521-337 |
> > | | |
> > | Max Planck Institute | Fax +31-24-3521-213 |
> > | for Psycholinguistics | |
> > | | E-mail [log in to unmask] |
> > | Postbus 310 | |
> > | NL-6500 AH Nijmegen | |
> > | | |
> > | The Netherlands | |
> > *****************************************************************
>
> --
> José Ma. Maisog, M.D. Senior Systems Engineer
> Sensor Systems, Inc. Voice: (703) 437-7651
> 103A Carpenter Drive FAX: (703) 437-0039
> Sterling, VA 20164-4423 Web: www.sensor.com
>
*****************************************************************
| | |
| Dr. Peter Indefrey | Phone +31-24-3521-337 |
| | |
| Max Planck Institute | Fax +31-24-3521-213 |
| for Psycholinguistics | |
| | E-mail [log in to unmask] |
| Postbus 310 | |
| NL-6500 AH Nijmegen | |
| | |
| The Netherlands | |
*****************************************************************
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