Hi Markus
there is no way to know until you try it. There are many possible sources
of variance depending on e.g. how uniformly they are calibrated, but you
have to try and see.
cheers
Bruce
On Wed, 12 Mar 2014, Markus Gschwind wrote:
Dear all,
I am planning to create a "local cortical thickness normal template" in
order to test single patients against it.
For that purpose I was planning to use 50-100 MPRAGE scans of healthy
subjects (balanced for age range and sex).
My question is, if I should worry about the scanner where the data comes
form. We have three Siemens Trios, the MPRAGES are more or less the same
protocols.
- when the created template with standart deviation map comes from all three
scanners, can I test patients coming from all three scanners? Will it reduce
sensitivity?
- when the created template comes from only one scanner, it is clear that I
will not be able to compare patients coming from another scanner against it.
Thank you!
Markus
_______________________________________________
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 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
http://www.partners.org/complianceline . 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.
