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Higher the better resolution, but it's particularly important that the resolution is close to 3D isotropic for surface reconstruction.
Matt.
On 6/7/19, 1:38 PM, "freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Jones, Richard" <freesurfer-bounces@nmr.mgh.harvard.edu on behalf of richard.jones@choa.org> wrote:
External Email - Use Caution
A few more questions regarding the use of a FLAIR image.
1)If one is using the hires option on T1 images acquired with sub-millimeter spatial resolution then, to get the best results with the FLAIR option, is matching spatial resolution required for the FLAIR sequence?
2)In a post some time ago (https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg51413.html) you said "V6 was not meant for T2/FLAIR and we didn't test it extensively. We have been optimizing things in the past week for T2/FLAIR and I expect 6.1 will be better for them". Are the changes you were referring to incorporated in the current development version?
3)Are then any plans to use the FLAIR for multi-modal segmentation in order to refine the segmentation of the Pallidium and Putamen, and to possibly segment structures such as the substantia nigra and red nucleus?
Thanks,
Richard
Date: Tue, 4 Jun 2019 12:41:51 -0400 (EDT) From: Bruce Fischl fischl@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] T2/Flair benefits in freesurfer 6.0 To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Message-ID: alpine.LRH.2.20.1906041241290.302@gate.nmr.mgh.harvard.edu Content-Type: text/plain; charset="utf-8"
Hi Aaron
yes, it helps in other situations like blood vessels
cheers Bruce On Tue, 4 Jun 2019, Aaron Tanenbaum wrote:
> > ????????External Email - Use Caution???????? > > I am not too sure if I have asked you this question before. I know the use > of a flair or T2 helps with dealing with the dura. I was wondering if there > are other benefits?? > >
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________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.
well,I would be a bit more cautious than this. I agree isotropic is important, but don't push the resolution so far that your CNR is too low
cheers Bruce
On Fri, 7 Jun 2019, Glasser, Matthew wrote:
External Email - Use CautionHigher the better resolution, but it's particularly important that the resolution is close to 3D isotropic for surface reconstruction.
Matt.
On 6/7/19, 1:38 PM, "freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Jones, Richard" <freesurfer-bounces@nmr.mgh.harvard.edu on behalf of richard.jones@choa.org> wrote:
External Email - Use CautionA few more questions regarding the use of a FLAIR image.
1)If one is using the hires option on T1 images acquired with sub-millimeter spatial resolution then, to get the best results with the FLAIR option, is matching spatial resolution required for the FLAIR sequence?
2)In a post some time ago (https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg51413.html) you said "V6 was not meant for T2/FLAIR and we didn't test it extensively. We have been optimizing things in the past week for T2/FLAIR and I expect 6.1 will be better for them". Are the changes you were referring to incorporated in the current development version?
3)Are then any plans to use the FLAIR for multi-modal segmentation in order to refine the segmentation of the Pallidium and Putamen, and to possibly segment structures such as the substantia nigra and red nucleus?
Thanks,
Richard
Date: Tue, 4 Jun 2019 12:41:51 -0400 (EDT) From: Bruce Fischl fischl@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] T2/Flair benefits in freesurfer 6.0 To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Message-ID: alpine.LRH.2.20.1906041241290.302@gate.nmr.mgh.harvard.edu Content-Type: text/plain; charset="utf-8"
Hi Aaron
yes, it helps in other situations like blood vessels
cheers Bruce On Tue, 4 Jun 2019, Aaron Tanenbaum wrote:
????????External Email - Use Caution????????
I am not too sure if I have asked you this question before. I know the use of a flair or T2 helps with dealing with the dura. I was wondering if there are other benefits??
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.
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Glasser, Matthew