The following pair are consistent: lh.BA.thresh BA44 GrayVol rh.BA.thresh BA44 GrayVol

The following pair are inconsistent: lh.BA BA44 GrayVol rh.BA BA44 GrayVol Other measurements in the lh.BA and rh.BA atlases may also be inconsistent.

Thanks,

Jacob ________________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Douglas N Greve greve@nmr.mgh.harvard.edu Sent: 02 February 2017 16:40 To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] possible atlas error to report

Sorry, which labels are consistent and which are inconsistent?

On 02/02/2017 02:52 PM, Levman, Jacob wrote:

Hi there,

I've been conducting an asymmetry analysis based on FreeSurfer measurements. There are regions of the brain with known left-right asymmetry such as BA44 which exhibits strong leftward asymmetry (the left side is bigger than the right). This is accurately reflected when you compare the BA44 GrayVol measurement from lh.BA.thresh to rh.BA.thresh. However, in the lh.BA and rh.BA results, the BA44 GrayVol measurements consistently indicate a rightward asymmetry (right side larger than the left side) though this conflicts with known findings in the literature for this region of the brain and is the opposite pattern to that produced in lh.BA.thresh and rh.BA.thresh.

This indicates that the lh.BA and rh.BA results may be left-right inverted in BA44 and possibly in other regions as well.

Thanks,

Jacob

​

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I would certainly use the thresh. The unthresholded is there in case you wanted to set your own threshold. But it should always be thresholded at something

On 02/03/2017 09:06 AM, Levman, Jacob wrote:

The following pair are consistent: lh.BA.thresh BA44 GrayVol rh.BA.thresh BA44 GrayVol

The following pair are inconsistent: lh.BA BA44 GrayVol rh.BA BA44 GrayVol Other measurements in the lh.BA and rh.BA atlases may also be inconsistent.

Thanks,

Jacob ________________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Douglas N Greve greve@nmr.mgh.harvard.edu Sent: 02 February 2017 16:40 To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] possible atlas error to report

Sorry, which labels are consistent and which are inconsistent?

On 02/02/2017 02:52 PM, Levman, Jacob wrote:

...

Hi there,

I've been conducting an asymmetry analysis based on FreeSurfer measurements. There are regions of the brain with known left-right asymmetry such as BA44 which exhibits strong leftward asymmetry (the left side is bigger than the right). This is accurately reflected when you compare the BA44 GrayVol measurement from lh.BA.thresh to rh.BA.thresh. However, in the lh.BA and rh.BA results, the BA44 GrayVol measurements consistently indicate a rightward asymmetry (right side larger than the left side) though this conflicts with known findings in the literature for this region of the brain and is the opposite pattern to that produced in lh.BA.thresh and rh.BA.thresh.

This indicates that the lh.BA and rh.BA results may be left-right inverted in BA44 and possibly in other regions as well.

Thanks,

Jacob

​

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://urldefense.proofpoint.com/v2/url?u=https-3A__mail.nmr.mgh.harvard.ed...

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

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://urldefense.proofpoint.com/v2/url?u=https-3A__gate.nmr.mgh.harvard.ed... www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: https://urldefense.proofpoint.com/v2/url?u=ftp-3A__surfer.nmr.mgh.harvard.ed...

---

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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 https://urldefense.proofpoint.com/v2/url?u=http-3A__www.partners.org_complia... . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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