ist
*Subject:* Re: [Freesurfer] MRI image quality metrics
Hi,
The following is taken from *MailScanner has detected
a possible fraud attempt from "secure-web.cisco.com"
claiming to be*
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We provide example subjects, like bert, as part of the freesurfer distribution.
But the install location on the Mac (and linux) is usually write
protected and so while you can read data from there, you can’t write data
there. You can place your own
SNR, you'll have to calculate them as:
>>>> 1.
>>>>
>>>> Run the recon-all pipeline to process your MRI data.
>>>> 2.
>>>>
>>>> Use the mri_binarize tool to create a binar
t;> Use the mri_segstats tool to calculate the mean and standard
>>> deviation of the intensity values within the ROI.
>>> 4.
>>>
>>> Then your SNR = mean_intensity/std_of_intensity.
>>>
>>>
>>> Best,
>>>
>
; Then your SNR = mean_intensity/std_of_intensity.
>>
>>
>> Best,
>>
>> Avnish
>> --
>> *From:* freesurfer-boun...@nmr.mgh.harvard.edu <
>> freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Huang, Yujing &l
t;
> Avnish
> --
> *From:* freesurfer-boun...@nmr.mgh.harvard.edu <
> freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Huang, Yujing <
> yhuan...@mgh.harvard.edu>
> *Sent:* Tuesday, February 7, 2023 9:09 AM
> *To:* Freesurfer suppor
From: freesurfer-boun...@nmr.mgh.harvard.edu
on behalf of Huang, Yujing
Sent: Tuesday, February 7, 2023 9:09 AM
To: Freesurfer support list
Subject: Re: [Freesurfer] MRI image quality metrics
Hi,
The following is taken from
https://github.com/ComaRecoveryLab/Lesion_Correction
Hemisphere CNR + Right Hemisphere CNR) x 2
“
Best,
Yujing
From: freesurfer-boun...@nmr.mgh.harvard.edu
On Behalf Of MANSON ERIC NAAB
Sent: Tuesday, February 7, 2023 5:26 AM
To: Freesurfer support list
Subject: [Freesurfer] MRI image quality metrics
External Email - Use Caution
Dear
External Email - Use Caution
Dear FreeSurfer experts,
Please, I need your assistance and guidance on calculating the
contrast-to-noise ratio (CNR) and signal-to-noise-ratio (SNR) of White
matter, Gray matter, and CSF of the brain after recon-all.
Thank you
