Re: [Freesurfer] grey matter density

2014-08-01 Thread Douglas N Greve
We don't compute density. You can run mri_compute_volume_fractions to produce such images doug On 07/31/2014 09:54 PM, Qiongmin wrote: > Dear All, > > I wonder if there are any functions that can calculate the grey matter > density of the vertices or in the ROI manner? I figured out that Free

[Freesurfer] grey matter density

2014-07-31 Thread Qiongmin
Dear All, I wonder if there are any functions that can calculate the grey matter density of the vertices or in the ROI manner? I figured out that Freesurfer can give the thickness, area, volume, curv, but I can not find grey matter density anywhere. Thanks for any advice! Qiongmin __

Re: [Freesurfer] Grey Matter Density?

2010-06-30 Thread Matthew Ku
dchin...@seas.upenn.edu; freesurfer@nmr.mgh.harvard.edu Subject: RE: [Freesurfer] Grey Matter Density? Hi Matt, I don't know what the MNI considers and whether it includes things we don't, sorry. Bruce On Wed, 30 Jun 2010, Matthew Ku wrote: > Dear Professor Fischl, > > > > Than

Re: [Freesurfer] Grey Matter Density?

2010-06-30 Thread Bruce Fischl
know what MINC considers grey matter in comparison to what Freesurfer considers grey matter? Best, Matt From: Bruce Fischl [mailto:fis...@nmr.mgh.harvard.edu] Sent: Wednesday, June 23, 2010 5:40 PM To: Schwartz, Carl R.E. Cc: mat...@seas.upenn.edu Subject: Re: [Freesurfer] Grey Matter Densit

Re: [Freesurfer] Grey Matter Density?

2010-06-30 Thread Matthew Ku
Fischl [mailto:fis...@nmr.mgh.harvard.edu] Sent: Wednesday, June 23, 2010 5:40 PM To: Schwartz, Carl R.E. Cc: mat...@seas.upenn.edu Subject: Re: [Freesurfer] Grey Matter Density? Sure, that would be great On Jun 23, 2010, at 5:21 PM, "Schwartz, Carl R.E." wrote: Bruce, if you

Re: [Freesurfer] Grey Matter Density?

2010-06-23 Thread Michael Harms
t, > Matt > > -Original Message- > From: freesurfer-boun...@nmr.mgh.harvard.edu > [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Bruce Fischl > Sent: Wednesday, June 23, 2010 3:47 PM > To: Matthew Ku > Cc: freesurfer@nmr.mgh.harvard.edu; dchin...@se

Re: [Freesurfer] Grey Matter Density?

2010-06-23 Thread Matthew Ku
...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Bruce Fischl Sent: Wednesday, June 23, 2010 3:47 PM To: Matthew Ku Cc: freesurfer@nmr.mgh.harvard.edu; dchin...@seas.upenn.edu Subject: Re: [Freesurfer] Grey Matter Density? Hi Matt, you could use mri_binarize to extract a

Re: [Freesurfer] Grey Matter Density?

2010-06-23 Thread Bruce Fischl
t; Cc: dchin...@seas.upenn.edu; freesurfer@nmr.mgh.harvard.edu > Subject: Re: [Freesurfer] Grey Matter Density? > > Hi Matt, > > density is really just average gray matter per unit volume. Why would you > want to compute such a thing? I think the way SPM/FSL does it is to take a >

Re: [Freesurfer] Grey Matter Density?

2010-06-23 Thread Matthew Ku
fer-boun...@nmr.mgh.harvard.edu] On Behalf Of Bruce Fischl Sent: Wednesday, June 23, 2010 3:20 PM To: Matthew Ku Cc: dchin...@seas.upenn.edu; freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Grey Matter Density? Hi Matt, density is really just average gray matter per unit volume. Why would you

Re: [Freesurfer] Grey Matter Density?

2010-06-23 Thread Bruce Fischl
Hi Matt, density is really just average gray matter per unit volume. Why would you want to compute such a thing? I think the way SPM/FSL does it is to take a binary segmentation and smooth it, but you can check with them. cheers Bruce On Wed, 23 Jun 2010, Matthew Ku wrote: > Hi Freesurfer Exp

[Freesurfer] Grey Matter Density?

2010-06-23 Thread Matthew Ku
Hi Freesurfer Experts, I have been running Freesurfer to calculate the grey matter volume of pediatric brains but I was wondering if there was a method to determine grey matter density using Freesurfer? I have read a question previously posted asking a similar question, but there had been no re