[Freesurfer] Post-Doctoral position in brain imaging and computational morphometry – University of Geneva

2012-12-14 Thread Narly Golestani

Post-Doctoral applications are invited in the newly established Brain and 
Language Lab at the Department of Clinical Neuroscience at the University of 
Geneva, in collaboration with the Swiss Institute of Technology (EPFL) in 
Lausanne, Switzerland.  Projects will include the development of new 
data-driven computational morphometry methods for analysis of structural 
magnetic resonance imaging (MRI) data, and application of these to large 
datasets in the context of normal variability, disease, and expertise. 

Candidates should have a degree in Biomedical Engineering, Computational 
Neuroscience, or a related field with a strong mathematical and computational 
background. Ideally they should have experience in brain image analysis, 
pattern recognition, machine learning, statistics as well as excellent 
programming skills. 

We offer a competitive starting salary of 68, 964 CHF/year, or more depending 
on experience.

The position is available immediately, and applications will be considered 
until the position is filled.  Informal inquiries can be addressed to Narly 
Golestani (narly.golest...@unige.ch).   Applications including a CV, a 
statement of research interests, and the names and full contact details of 
three referees should be sent to: narly.golest...@unige.ch.

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Re: [Freesurfer] Chunks of missing WM

2012-12-14 Thread Emily Rogalski
We ran into this issue frequently and found that it was resolved by using
the revised recon -all script that alters the stage where control points
are considered.

Emily


On Wed, Dec 12, 2012 at 10:42 AM, Jonathan Holt whats...@umich.edu wrote:

 OK will do... I'll upload both versions, before and after recon-all ran. I
 am beginning to think it's an issue with the script that I am running...
 I'm looking at another brain and there are areas I did not touch at all
 where white matter voxels are being added or removed...


 On Dec 12, 2012, at 11:33 AM, Bruce Fischl wrote:

  Hi Jon
 
  if you upload this subject we'll take a look
  Bruce
 
 
  On Wed, 12 Dec 2012, Jonathan Holt wrote:
 
  I've had this happen a handful of times and I'm wondering what I can do
 about it. For reference using Freesurfer 5.0.0.
 
  Edited a brain and ran recon-all -autorecon2 -autorecon3 -s subj_id
 which completed without error. The resulting brain had chunks of missing
 auxiliary volume in areas that I had not touched at all. This is bizarre
 and I am not sure what to do about it. Images of said issue attached of
 both main and auxiliary volumes.
 
 
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-- 
Emily J Rogalski, PhD
Assistant Research Professor
Northwestern University
Cognitive Neurology and Alzheimer's Disease Center (CNADC)
320 E Superior Street
Searle Building 11th Floor
Chicago, IL 60611
312-503-1155 phone
312-908-8789 fax
erogal...@gmail.com
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[Freesurfer] Beta maps

2012-12-14 Thread Alex Hanganu

Dear FreeSurfer List,

How can I visualise the beta maps ?

previously there is a mail about this: 
http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg02048.html


The /average7/ subject is missing in FreeSurfer 5.1, so I guess using 
/fsaverage/ is the same, but that command shows no results.


The command:
/tksurfer fsaverage lh inflated -overlay beta.mgh -fthresh 0

/shows red areas on blue cortex. Is this correct ?

Thanks,

Alex.
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Re: [Freesurfer] Beta maps

2012-12-14 Thread Douglas N Greve

that command is correct. you might try adjusting the threshold
doug


On 12/14/2012 12:04 PM, Alex Hanganu wrote:
 Dear FreeSurfer List,

 How can I visualise the beta maps ?

 previously there is a mail about this: 
 http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg02048.html

 The /average7/ subject is missing in FreeSurfer 5.1, so I guess 
 using /fsaverage/ is the same, but that command shows no results.

 The command:
 /tksurfer fsaverage lh inflated -overlay beta.mgh -fthresh 0

 /shows red areas on blue cortex. Is this correct ?

 Thanks,

 Alex.


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-- 
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MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
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Re: [Freesurfer] Chunks of missing WM

2012-12-14 Thread Jonathan Holt
Emily,

This is good news, can I find or download this revised version somewhere?

jon
On Dec 14, 2012, at 11:37 AM, Emily Rogalski wrote:

 We ran into this issue frequently and found that it was resolved by using the 
 revised recon -all script that alters the stage where control points are 
 considered.
 
 Emily
 
 
 On Wed, Dec 12, 2012 at 10:42 AM, Jonathan Holt whats...@umich.edu wrote:
 OK will do... I'll upload both versions, before and after recon-all ran. I am 
 beginning to think it's an issue with the script that I am running... I'm 
 looking at another brain and there are areas I did not touch at all where 
 white matter voxels are being added or removed...
 
 
 On Dec 12, 2012, at 11:33 AM, Bruce Fischl wrote:
 
  Hi Jon
 
  if you upload this subject we'll take a look
  Bruce
 
 
  On Wed, 12 Dec 2012, Jonathan Holt wrote:
 
  I've had this happen a handful of times and I'm wondering what I can do 
  about it. For reference using Freesurfer 5.0.0.
 
  Edited a brain and ran recon-all -autorecon2 -autorecon3 -s subj_id 
  which completed without error. The resulting brain had chunks of missing 
  auxiliary volume in areas that I had not touched at all. This is bizarre 
  and I am not sure what to do about it. Images of said issue attached of 
  both main and auxiliary volumes.
 
 
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 https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
 
 
 
 -- 
 Emily J Rogalski, PhD
 Assistant Research Professor
 Northwestern University
 Cognitive Neurology and Alzheimer's Disease Center (CNADC)
 320 E Superior Street
 Searle Building 11th Floor
 Chicago, IL 60611
 312-503-1155 phone
 312-908-8789 fax
 erogal...@gmail.com
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 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
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 properly
 dispose of the e-mail.

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Re: [Freesurfer] Chunks of missing WM

2012-12-14 Thread Alex Hanganu

I think Emily is talking about this one:

ftp://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/misc/allplatforms/

a.


Le 14/12/2012 12:59 PM, Jonathan Holt a écrit :

Emily,

This is good news, can I find or download this revised version somewhere?

jon
On Dec 14, 2012, at 11:37 AM, Emily Rogalski wrote:

We ran into this issue frequently and found that it was resolved by 
using the revised recon -all script that alters the stage where 
control points are considered.


Emily


On Wed, Dec 12, 2012 at 10:42 AM, Jonathan Holt whats...@umich.edu 
mailto:whats...@umich.edu wrote:


OK will do... I'll upload both versions, before and after
recon-all ran. I am beginning to think it's an issue with the
script that I am running... I'm looking at another brain and
there are areas I did not touch at all where white matter voxels
are being added or removed...


On Dec 12, 2012, at 11:33 AM, Bruce Fischl wrote:

 Hi Jon

 if you upload this subject we'll take a look
 Bruce


 On Wed, 12 Dec 2012, Jonathan Holt wrote:

 I've had this happen a handful of times and I'm wondering what
I can do about it. For reference using Freesurfer 5.0.0.

 Edited a brain and ran recon-all -autorecon2 -autorecon3 -s
subj_id which completed without error. The resulting brain had
chunks of missing auxiliary volume in areas that I had not
touched at all. This is bizarre and I am not sure what to do
about it. Images of said issue attached of both main and
auxiliary volumes.






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Re: [Freesurfer] tksurfer - view only clusters from a certain nr of voxels

2012-12-14 Thread Douglas N Greve
Hi Alex, you can't do that with tksurfer. You will have to run 
mri_surfcluster to create a new overlay with clusters smaller than 50 
removed.
doug
ps. Please send emails to the FS list and not directly to me. thanks!


On 12/14/2012 02:17 PM, Alex Hanganu wrote:
 Dear Douglas,

 I am using tksurfer for analysing the results.

 Can you pleasetell me - what flag should I use in order to limit the 
 minimalthreshold of clusters to a certain number of voxels ?
 For example if I want to show only those significant clusters, which 
 have at least 50 voxels.

 I couldn't find this answer in the wiki.

 Thanks !!

 Sincerely,

 Alex.

-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/

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Re: [Freesurfer] tksurfer - view only clusters from a certain nr of voxels

2012-12-14 Thread Alex Hanganu
Thanks Douglas !

OK !!

Alex.



Le 14/12/2012 2:27 PM, Douglas N Greve a écrit :
 Hi Alex, you can't do that with tksurfer. You will have to run 
 mri_surfcluster to create a new overlay with clusters smaller than 50 
 removed.
 doug
 ps. Please send emails to the FS list and not directly to me. thanks!


 On 12/14/2012 02:17 PM, Alex Hanganu wrote:
 Dear Douglas,

 I am using tksurfer for analysing the results.

 Can you please tell me - what flag should I use in order to limit the 
 minimal threshold of clusters to a certain number of voxels ?
 For example if I want to show only those significant clusters, which 
 have at least 50 voxels.

 I couldn't find this answer in the wiki.

 Thanks !!

 Sincerely,

 Alex.


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Re: [Freesurfer] Interpretation of voxel values in TRACULA path.pd images

2012-12-14 Thread Ping-Hong Yeh
Hi Anastasia,
 Just follow up on this thread..
If 5000 samples were used for each voxel, how can I normalize the
intensity of path.pd volumes to a sum of 1 ?
Also what thresholding value was chosen to calculate the tract volume,
shown in the pathstats.overall.txt ?

Thanks.
ping



On Fri, Nov 9, 2012 at 10:56 AM, Anastasia Yendiki
ayend...@nmr.mgh.harvard.edu wrote:

 Hi Jon - The path.pd volumes are indeed the posterior probability
 distributions of each pathway. They are not normalized to a sum of 1
 though b/c they're estimated by a sampling algorithm (drawing sample paths
 from this unknown distribution and adding up the sample paths, instead of
 estimating the distribution directly).

 Hope this helps,
 a.y

 On Fri, 9 Nov 2012, Jon Clayden wrote:

 Dear all,
 I understand that the various path.pd image files that are created by 
 TRACULA represent a posterior
 distribution over the corresponding tract location, but I was wondering if 
 someone could explain to me
 exactly what the values in these images mean. I assume that they are not 
 probabilities as such, since they
 have values ranging up to several hundreds.

 Thanks in advance,
 Jon


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[Freesurfer] regarding use-mritotal

2012-12-14 Thread Eric Cunningham
Hi,

this link:
http://surfer.nmr.mgh.harvard.edu/fswiki/TalFailV5.1
discusses a solution to bad talairach.xfm transforms, the -use-mritotal
flag.

this link:
http://surfer.nmr.mgh.harvard.edu/fswiki/eTIV
mentions that the talairach.xfm is used to calculate the total intracranial
volume.

is using mritotal likely to result in significantly different intracranial
volumes even if the talairach.xfm does not appear to be very different when
viewed?

thanks much,
-eric
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[Freesurfer] Contents of SUBJECTS_DIR

2012-12-14 Thread Tudor Popescu
Hello everyone,

I'm following the group analysis tutorial, but have difficulty getting all
files in the right folders. I have my tutorial data set in *
/media/Dell/_FS/buckner_data/* (a folder that is shared in my VirtualBox),
and my original subjects folder in the default path of *
/home/virtualuser/freesurfer/subjects*.

The tutorial page
http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Datasuggests
that the data set should be inside
*$FREESURFER_HOME/subjects*, however I have no room in my virtual drive to
copy over the whole data set, and VirtualBox is making it difficult for me
to extend its size. I have thus defined SUBJECTS_DIR to
be*/media/Dell/_FS/buckner_data/
*, but then the first command of the analysis (mris_preproc) says it can't
find fsaverage!

The command only works if I create a new folder and copy the following in
there:

   - the contents of */group_analysis_tutorial* (i.e. folders of the type *
   004*, *008*, ..), and
   - the contents of* /home/virtualuser/freesurfer/subjects* (i.e. folders
   such as *bert*, *fsaverage*, ..)

..and then run the command from there  --  however, this seems very
cumbersome and takes a lot of time.
My question: does one always have to copy the fsaverage folder manually at
the same level as the data folders, or does it have to be the other way
around (i.e. data set copied into default */subjects* folder)? Can't there
be two environment variables, one for fsaverages and one for the data set,
so that no moving/copying is necessary?

Many thanks for any help!
Tudor
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Re: [Freesurfer] Contents of SUBJECTS_DIR

2012-12-14 Thread Douglas N Greve

Hi Tudor, you can create a symbolic link to fsaverage rather than 
copying it.
doug


On 12/14/2012 04:18 PM, Tudor Popescu wrote:
 Hello everyone,

 I'm following the group analysis tutorial, but have difficulty getting 
 all files in the right folders. I have my tutorial data set in 
 //media/Dell/_FS/buckner_data// (a folder that is shared in my 
 VirtualBox), and my original subjects folder in the default path of 
 //home/virtualuser/freesurfer/subjects/.

 The tutorial page 
 http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Data suggests 
 that the data set should be inside /$FREESURFER_HOME/subjects/, 
 however I have no room in my virtual drive to copy over the whole data 
 set, and VirtualBox is making it difficult for me to extend its size. 
 I have thus defined SUBJECTS_DIR to be//media/Dell/_FS/buckner_data//, 
 but then the first command of the analysis (mris_preproc) says it 
 can't find fsaverage!

 The command only works if I create a new folder and copy the following 
 in there:

   * the contents of //group_analysis_tutorial/ (i.e. folders of the
 type /004/, /008/, ..), and
   * the contents of//home/virtualuser/freesurfer/subjects/ (i.e.
 folders such as /bert/, /fsaverage/, ..)

 ..and then run the command from there  --  however, this seems very 
 cumbersome and takes a lot of time.

 My question: does one always have to copy the fsaverage folder 
 manually at the same level as the data folders, or does it have to be 
 the other way around (i.e. data set copied into default //subjects/ 
 folder)? Can't there be two environment variables, one for fsaverages 
 and one for the data set, so that no moving/copying is necessary?

 Many thanks for any help!
 Tudor


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-- 
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MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
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Re: [Freesurfer] Chunks of missing WM

2012-12-14 Thread Bruce Fischl

it doesn't, although the 5.2 mri_normalize should help as well

cheers
Bruce
On Fri, 14 
Dec 2012, Jonathan Holt wrote:



OK this is great. Does this require the latest version of Freesurfer? I see
recon-all v 5.2, we're running Freesurfer 5.0.0 for reference
On Dec 14, 2012, at 1:16 PM, Alex Hanganu wrote:

  I think Emily is talking about this one:

  ftp://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/misc/allplatforms/

  a.


  Le 14/12/2012 12:59 PM, Jonathan Holt a écrit :
  Emily,
This is good news, can I find or download this revised version
somewhere?

jon
On Dec 14, 2012, at 11:37 AM, Emily Rogalski wrote:

  We ran into this issue frequently and found that it
  was resolved by using the revised recon -all script
  that alters the stage where control points are
  considered.

  Emily


  On Wed, Dec 12, 2012 at 10:42 AM, Jonathan Holt
  whats...@umich.edu wrote:
OK will do... I'll upload both versions,
before and after recon-all ran. I am
beginning to think it's an issue with
the script that I am running... I'm
looking at another brain and there are
areas I did not touch at all where white
matter voxels are being added or
removed...


On Dec 12, 2012, at 11:33 AM, Bruce
Fischl wrote:

 Hi Jon

 if you upload this subject we'll take
a look
 Bruce


 On Wed, 12 Dec 2012, Jonathan Holt
wrote:

 I've had this happen a handful of
times and I'm wondering what I can do
about it. For reference using Freesurfer
5.0.0.

 Edited a brain and ran recon-all
-autorecon2 -autorecon3 -s subj_id
which completed without error. The
resulting brain had chunks of missing
auxiliary volume in areas that I had not
touched at all. This is bizarre and I am
not sure what to do about it. Images of
said issue attached of both main and
auxiliary volumes.


 


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e-mail
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Re: [Freesurfer] Contents of SUBJECTS_DIR

2012-12-14 Thread Douglas N Greve

On 12/14/2012 04:51 PM, Tudor Popescu wrote:
 Thanks Doug! I tried figuring out how to create symlinks manually (as 
 I think recon-all has already been run in the case of the group 
 analysis tutorial, therefore they were not generated automatically) 
 but could not find anything helpful on the wiki.
cd $SUBJECTS_DIR
ln -s $FREESURFER_HOME/fsaverage

 I also looked for a tutorial on how to run recon-all on raw NIFTI 
 files (which I guess first have to be converted to MGZ), as I'd first 
 have to do this step to my own data before starting to follow the 
 steps described in the group analysis tutorial.
You can just spec the nifti file as input (--i file.nii), you do not 
need to convert
doug

 Tudor

 On 14 December 2012 21:23, Douglas N Greve gr...@nmr.mgh.harvard.edu 
 mailto:gr...@nmr.mgh.harvard.edu wrote:


 Hi Tudor, you can create a symbolic link to fsaverage rather than
 copying it.
 doug


 On 12/14/2012 04:18 PM, Tudor Popescu wrote:
  Hello everyone,
 
  I'm following the group analysis tutorial, but have difficulty
 getting
  all files in the right folders. I have my tutorial data set in
  //media/Dell/_FS/buckner_data// (a folder that is shared in my
  VirtualBox), and my original subjects folder in the default path of
  //home/virtualuser/freesurfer/subjects/.
 
  The tutorial page
  http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Data suggests
  that the data set should be inside /$FREESURFER_HOME/subjects/,
  however I have no room in my virtual drive to copy over the
 whole data
  set, and VirtualBox is making it difficult for me to extend its
 size.
  I have thus defined SUBJECTS_DIR to
 be//media/Dell/_FS/buckner_data//,
  but then the first command of the analysis (mris_preproc) says it
  can't find fsaverage!
 
  The command only works if I create a new folder and copy the
 following
  in there:
 
* the contents of //group_analysis_tutorial/ (i.e. folders of the
  type /004/, /008/, ..), and
* the contents of//home/virtualuser/freesurfer/subjects/ (i.e.
  folders such as /bert/, /fsaverage/, ..)
 
  ..and then run the command from there  --  however, this seems very
  cumbersome and takes a lot of time.
 
  My question: does one always have to copy the fsaverage folder
  manually at the same level as the data folders, or does it have
 to be
  the other way around (i.e. data set copied into default //subjects/
  folder)? Can't there be two environment variables, one for
 fsaverages
  and one for the data set, so that no moving/copying is necessary?
 
  Many thanks for any help!
  Tudor
 
 
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 --
 Douglas N. Greve, Ph.D.
 MGH-NMR Center
 gr...@nmr.mgh.harvard.edu mailto:gr...@nmr.mgh.harvard.edu
 Phone Number: 617-724-2358
 Fax: 617-726-7422

 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
 http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
 FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
 http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html
 Outgoing:
 ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/

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 the e-mail
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 dispose of the e-mail.



-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/

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[Freesurfer] ooops deleted fsaverage

2012-12-14 Thread Joshua Lee
do I need to download the whole  freesurfer package again to get it?
-
Josh
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