[Freesurfer] Postdoctoral Fellowship in multimodal developmental neuroimaging

2010-10-22 Thread Michels Lars
Postdoctoral Fellowship in multimodal developmental neuroimaging 

 

Applications are invited for a 2-years postdoctoral fellowship in the human 
multimodal neuroimaging project Linking the major system markers for typical 
and atypical brain development: a multimodal imaging and spectroscopy study 
(http://www.zihp.uzh.ch/1610.php#45) funded by the Zürich Institute of Human 
Physiology. 

This study will investigate the major physiological markers of brain 
development, using a combination of advanced magnetic resonance imaging (e.g., 
functional MRI) and MR-spectroscopy methods. The initial phase of the study 
will establish baseline neurotransmitter levels, cerebral blood flow (e.g., 
perfusion MRI) and EEG frequency and power at rest across a range of age 
groups. Examining the interactions between these markers and the changes they 
demonstrate with age and hormone levels will allow to better understanding the 
global and regional processes underlying brain maturation. The later phases 
will investigate changes in these physiological markers with (a) cognitive 
tasks and (b) attention deficit hyperactivity disorder (ADHD). The starting 
date of the position is January 2011.

 

The successful applicant will have a PhD research background in Cognitive 
Neuroscience, Neurophysiology, Psychology, Neuropsychology, or related fields. 
Fluency in English, good oral and written German, and the ability to work 
within a multidisciplinary team are essential. Applicants should be experienced 
at conducting fMRI and/or EEG studies and be familiar with analysis software, 
such as SPM/Matlab, BrainVoyager and/or FSL. Experience with stimulus 
presentation software (such as Presentation), UNIX, and programming languages a 
plus. 

 

Salaries are in accordance with the Swiss National Research Foundation 
(starting at around 80'000 CHF p.a.). 

 

APPLICATION INSTRUCTIONS: To apply by e-mail (max 5 MB), please send a 
curriculum vitae, a personal statement describing research interests, 3 letters 
of recommendations, and up to 5 article reprints/preprints to:

 

Dr Lars Michels

lars.mich...@kispi.uzh.ch

MR-Zentrum

University Children's Hospital

Steinwiesstrasse 75

Zürich 8032

Switzerland

 

Reviews of applications will begin on the 7th of November and will continue 
until the positions are filled.

 
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Re: [Freesurfer] Freeview and Mac OS 10.6 - Snow Leopard

2010-10-22 Thread Nick Schmansky
it does not work in v5.0. however, this is one of our top priorities to
get working for release in the upcoming 5.1 (within a month or less).

n.

On Fri, 2010-10-22 at 12:42 +0200, Andreas Schindler wrote:
 Dear Freesurfers 
 
  
 
 Does anyone know if freeview already works on Mac OS Snow Leopard or
 when it will be patched?
 
 best wishes
 
 Andreas
 
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[Freesurfer] mni coordinates to volume index

2010-10-22 Thread Yigal Agam
Hi,

Is it possible in matlab to get the volume index coordinates 
corresponding to specific MNI coordiates?

Thanks,
Yigal
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Re: [Freesurfer] Talairach coordinates for Desikan gyral regions

2010-10-22 Thread Nick Schmansky
the subject 'fsaverage', included in the subjects dir of the
distribution, is already registered to talairach space, and it contains
the desikan annotations, so you could get the coords from that.  you'd
have to load it in tksurfer and click on the center vertex of region to
get the coord though, as there is no automated way to find the center of
the region (that i know of).

n.

On Fri, 2010-10-22 at 16:03 -0400, Robustelli, Briana (NIH/NIMH) [F]
wrote:
 Hi all,
   We are trying to depict spatial relations of each of the Desikan 
 et. al (2006) gyral regions in a separate 3-D graph.  To do this we need 
 every regions' center Talairach coordinates in common space, not in relation 
 to any particular group or subject.  Is there a way to do this using 
 Freesurfer?  Thank you.
 
 Briana
 
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[Freesurfer] Nifti surface to FreeSurfer surface

2010-10-22 Thread Alexander Hunold
Dear experts,

 

I got BEM surfaces out of the BET tool from the FSL package. The surface
files are in nifti format (*.nii.gz).
Now I wonder if there is any opportunity to convert nifti surfaces to
FreeSurfer surface in surf format (*.surf)?

I appreciate any hint.

Thank you so much in advance.

 

Sincerely,

Alexander

 

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Re: [Freesurfer] Nifti surface to FreeSurfer surface

2010-10-22 Thread Nick Schmansky
use mri_binarize to set each brain voxel value to the same value (maybe
bet does this), then use something like:

mri_tesselate mybrainmask.nii.gz 127 mybrainmask.surf

where '127' happens to be voxel value used in the binarization.

n.


On Fri, 2010-10-22 at 15:08 -0600, Alexander Hunold wrote:
 Dear experts,
 
  
 
 I got BEM surfaces out of the BET tool from the FSL package. The
 surface files are in nifti format (*.nii.gz).
 Now I wonder if there is any opportunity to convert nifti surfaces to
 FreeSurfer surface in surf format (*.surf)?
 
 I appreciate any hint.
 
 Thank you so much in advance.
 
  
 
 Sincerely,
 
 Alexander
 
  
 
 
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[Freesurfer] data not Surving FDR

2010-10-22 Thread Mira Michelle Raman
Hi,
  I have a dataset that seems to have some very nice group differences (please 
see the graph and qdec image), but they never seem to survive FDR.  I noticed 
when I run the Set Using FDR, it generates a very high threshold above 5; 
where as, with some of my other datasets FDR is set much lower (often in the 
2's and 3's). Can you please give me some insight into why the threshold is 
being set so high? Is it solely linked to the small sample size, or is there 
something additional we can do in the processing, so that regions with such 
large group differences will survive correction?

Thank you,
Mira

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Re: [Freesurfer] data not Surving FDR

2010-10-22 Thread Michael Harms

Hi Mira,
If the map you provided is of uncorrected p-values at say p=0.05, then
you appear to have just a couple small regions of group differences, so
it isn't surprising that after FDR nothing would survive. 

The result is what it is, and unless you had specific a priori
hypotheses regarding regions that would be involved (i.e., to which you
could restrict your testing), then there isn't much you can do.

cheers,
-MH

On Fri, 2010-10-22 at 14:53 -0700, Mira Michelle Raman wrote:
 Hi,
   I have a dataset that seems to have some very nice group differences 
 (please see the graph and qdec image), but they never seem to survive FDR.  I 
 noticed when I run the Set Using FDR, it generates a very high threshold 
 above 5; where as, with some of my other datasets FDR is set much lower 
 (often in the 2's and 3's). Can you please give me some insight into why the 
 threshold is being set so high? Is it solely linked to the small sample size, 
 or is there something additional we can do in the processing, so that regions 
 with such large group differences will survive correction?
 
 Thank you,
 Mira
 
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 addressed. If you believe this e-mail was sent to you in error and the e-mail
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 at
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 error
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 properly
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