[Mne_analysis] single-layer BEM model for EEG

[Le Wang]

Thanks you! This is very useful info to know. I will try to convince the
MRI people to run the FLASH at just 5 degrees.

Best
Le

On Thu, Oct 23, 2014 at 2:25 PM, dgw <dgwakeman at gmail.com> wrote:

> Hi Le,
>
> You can create decent BEM models from a single MEFLASH at 5 degrees
> (some users have even reported good results from a single echo). Which
> would save you half the time.
>
> HTH
> D
>
> On Thu, Oct 23, 2014 at 2:18 PM, Le Wang <lwang at bu.edu> wrote:
> > Hi, Alex,
> >
> > Thank you very much for the confirmation. I will try to get a 3-layer
> model
> > from just the MPRAGE (no FLASH for future subjects due to time
> constraints).
> >
> > Best
> > Le
> >
> > On Thu, Oct 23, 2014 at 3:33 AM, Alexandre Gramfort
> > <alexandre.gramfort at telecom-paristech.fr> wrote:
> >>
> >> hi Le,
> >>
> >> indeed you cannot use a homogeneous model in EEG forward calculations.
> >>
> >> it is not supported.
> >>
> >> Best,
> >> Alex
> >>
> >>
> >> On Wed, Oct 22, 2014 at 11:11 PM, Le Wang <lwang at bu.edu> wrote:
> >> > Hi,
> >> >
> >> > Would it be possible to calculate an EEG forward solution with
> >> > single-layer
> >> > BEM in MNE?
> >> >
> >> > I know it's generally a bad idea. I just want to see how bad the
> source
> >> > localization is with the single-layer BEM.
> >> >
> >> > I have the MRI scans (Flash5 and Flash30) and the 3-layer BEM for the
> >> > subject. The source localization of auditory N1 works great with the
> >> > 3-layer
> >> > BEM. I generated a single-layer BEM and tried to use it to compute a
> >> > forward
> >> > solution, but MNE do_forward_solution returned with error.
> >> >
> >> > Thanks!
> >> >
> >> > Best
> >> > Le
> >> >
> >> > ---
> >> > Le Wang, Ph.D.
> >> > Boston University
> >> > Boston, MA, 02215
> >> >
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