anover, NH 03755
Phone: +1 (603) 646-9834
Fax: +1 (603) 646-1419
Sent: Monday, October 19, 2015 at 12:24 PM
From: "Harms, Michael" <mha...@wustl.edu>
To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Subject: Re: [Freesurfer] MPRAGE SNR
A
-1419
Sent: Monday, October 19, 2015 at 12:24 PM
From: "Harms, Michael"
To: "freesurfer@nmr.mgh.harvard.edu"
Subject: Re: [Freesurfer] MPRAGE SNR
At best that would probably be harmless (if you have a decent number of subjects), but unless SNR, CNR actually relates
ot; <freesurfer@nmr.mgh.harvard.edu>
Date: Monday, October 19, 2015 10:57 AM
To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Cc: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Subject: Re: [Freesurfer] MPRAGE SNR
Hi Al
"
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] MPRAGE SNR
This has been my experience as well. Not much seems to predict which
scans will need to be edited.
On 10/19/15 10:23 AM, Harms, Michael wrote:
> Hi,
>
> FWIW, I've looked at a number of these measures in 500+ subjec
Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834
Fax: +1 (603) 646-1419
Sent: Monday, October 19, 2015 at 11:48 AM
From: "Douglas Greve"
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] MPRAGE SNR
This has been my exp
e normal range for cnr generated by the binary "mri_cnr"?
>>
>>
>> Bests,
>> John Anderson
>>
>> Senior Research Associate
>> Psychological and Brain Sciences Dept.
>> Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
>
l range for cnr generated by the binary "mri_cnr"?
>>
>>
>> Bests,
>> John Anderson
>>
>> Senior Research Associate
>> Psychological and Brain Sciences Dept.
>> Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
>> Phone:
H 03755
> Phone: +1 (603) 646-9834
> Fax: +1 (603) 646-1419
> Sent: Monday, October 19, 2015 at 8:36 AM
> From: "Bruce Fischl"
> To: "Freesurfer support list"
> Cc: j.haen...@psychologie.uzh.ch
> Subject: Re: [Freesurfer] MPRAGE SNR
> Hi John
>
>
Cc: j.haen...@psychologie.uzh.ch
Subject: Re: [Freesurfer] MPRAGE SNR
Hi John
there is also a binary called mri_cnr that will compute the
contrast-to-noise ratio (CNR), which is really the more interesting
metric. It will also spit out the WM means+- std, and the ratio of these
two can be used as an
: "Bruce Fischl"
To: "Freesurfer support list"
Cc: j.haen...@psychologie.uzh.ch
Subject: Re: [Freesurfer] MPRAGE SNR
Hi John
there is also a binary called mri_cnr that will compute the
contrast-to-noise ratio (CNR), which is really the more interesting
metric. It will also sp
: Monday, October 19, 2015 at 1:30 AM
From: JuergenHaenggi
To: "Freesurfer support list"
Subject: Re: [Freesurfer] MPRAGE SNR
Dear John
FS's QA tools provide the SNR
see https://surfer.nmr.mgh.harvard.edu/fswiki/QATools
there is also a FS function called wm-anat-snr that can b
: Monday, October 19, 2015 at 1:30 AM
From: JuergenHaenggi
To: "Freesurfer support list"
Subject: Re: [Freesurfer] MPRAGE SNR
Dear John
FS's QA tools provide the SNR
see https://surfer.nmr.mgh.harvard.edu/fswiki/QATools
there is also a FS function called wm-anat-snr that can b
Dear John
FS's QA tools provide the SNR
see https://surfer.nmr.mgh.harvard.edu/fswiki/QATools
there is also a FS function called wm-anat-snr that can be used for that.
Hope this helps
Cheers
Jürgen
---
Dear Experts,
Is there any tool in Freesurfer that can help to evaluate the SNR for T1 MPRAGE images directly ( i.e script). If not knidly can any help me to figure out the best way to dao it.
I highly appreciate your help!
Bests,
John Anderson
Senior Research Associate
Psychological and
Dear FreeSurfer Experts,
Is there a way to estimate the SNR in MPRAGE scans besides using wm-anat-snr ?
For examples, I read that SNR is improved in multiecho MPRAGE and I am
wondering how that is computed?
Thanks!
Daniel
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