-------- Original Message --------

Subject: Re: [Freesurfer] mri_coreg

Local Time: August 23, 2017 6:49 PM

UTC Time: August 23, 2017 10:49 PM

From: greve@nmr.mgh.harvard.edu

To: freesurfer@nmr.mgh.harvard.edu

Actually, it is on by default (thanks to Emma for pointing it out). The

smoothing helps to blur anatomical differences which reduces the chance

that it will get stuck in a local minimum. It will usually only smooth

the reference, and only if it is high res; this can help the reference

look a little more like the moveable. In the end, I don"t think it makes

much of a difference except to make it a little more robust.

On 08/21/2017 03:52 PM, Douglas N Greve wrote:

> I don"t think that is turned on by default. There is smoothing of the

> NMI historgrams, but that is unrelated

>

>

> On 08/21/2017 12:07 PM, John Anderson wrote:

>> Dear Dr Greve,

>> Kindly, I wanted to know why "mri_coreg" apples smoothing during

>> registration. e.g.

>>

>> mri_coreg --s subject --mov template.nii.gz --reg template.reg.lta

>>

>> Are there any effects on the accuracy of smoothing if I turn off this

>> default feature (specifically in pet surfer pipeline).

>>

>> mri_coreg --s subject --mov template.nii.gz --reg template.reg.lta

>> --no-smooth

>>

>> Thank you for any clarification

>> John

>>

>>

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>> Freesurfer@nmr.mgh.harvard.edu

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>

--

Douglas N. Greve, Ph.D.

MGH-NMR Center

greve@nmr.mgh.harvard.edu

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