Dear Martin,

Thank you so much for your reply.

I searched the freesurfer mailing list, and indeed it seemed that optical chiasm should be left out. However, optic chiasm is made up of axons, which automatically qualifies as "white matter". Is this a contradiction?

Thank you!

Sincerely, Ye

On Fri, Jul 19, 2013 at 2:02 PM, Martin Kavec martin.kavec@gmail.comwrote:

It's an optic chiasm, crossing of optic nervers.

Martin

Sent from my iPad

On 19.7.2013, at 20:28, ye tian tianye730@gmail.com wrote:

...

Dear freesurfers,

I would like to confirm that the circled region in whitematter.png is

not white matter. I initially manually deleted the white matter in wm.mgz for a few subjects. Now I see that it is such a common problem and I start to loose confidence in my editing. Would anyone please give me a second opinion?

...

Thank you very much!

Sincerely, Ye

<white matter.png> <Freesurfer.png> _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

The information in this e-mail is intended only for the person to whom

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e-mail

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Dear Bruce,

Thank you very much for the clarification.

Sincerely, Ye

On Fri, Jul 19, 2013 at 3:01 PM, Bruce Fischl fischl@nmr.mgh.harvard.eduwrote:

it doesn't really matter. We frequently erase it as (1) it's non-cortical, and (2) it ends up being a little strand on the inflated surface. It won't matter if you leave it though

On Fri, 19 Jul 2013, ye tian wrote:

Dear Martin,

...

Thank you so much for your reply.

I searched the freesurfer mailing list, and indeed it seemed that optical chiasm should be left out. However, optic chiasm is made up of axons, which automatically qualifies as "white matter". Is this a contradiction?

Thank you!

Sincerely, Ye

On Fri, Jul 19, 2013 at 2:02 PM, Martin Kavec martin.kavec@gmail.com wrote: It's an optic chiasm, crossing of optic nervers.

  Martin

  Sent from my iPad

  On 19.7.2013, at 20:28, ye tian <tianye730@gmail.com> wrote:

  > Dear freesurfers,
  >
  > I would like to confirm that the circled region in
  whitematter.png is not white matter. I initially manually
  deleted the white matter in wm.mgz for a few subjects. Now I see
  that it is such a common problem and I start to loose confidence
  in my editing. Would anyone please give me a second opinion?
  >
  > Thank you very much!
  >
  > Sincerely,
  > Ye

...

<white matter.png> <Freesurfer.png> ______________________________**_________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.**edu/mailman/listinfo/**freesurfer<https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer>

The information in this e-mail is intended only for the person to

whom it is

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addressed. If you believe this e-mail was sent to you in error and

the e-mail

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contains patient information, please contact the Partners Compliance

HelpLine at

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http://www.partners.org/**compliancelinehttp://www.partners.org/complianceline. If the e-mail was sent to

you in error

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but does not contain patient information, please contact the sender

and properly

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dispose of the e-mail.