Hi Bruce,

It is a cross-sectional, descriptive analysis. The data has already been collected. The participants are not evenly distributed. Would it be appropriate to regress out scanner type if I am using the raw data (extracted via DKT atlas)?

thank you,

Heidi Lindroth BSN RN
PhD Candidate| School of Nursing
Program Assistant | School of Medicine and Public Health, Department of Anesthesiology
Predoctoral Fellow | Veterans Administration (Madison WI)

University of Wisconsin-Madison
701 Highland Avenue, Madison WI 53705
608-219-4294 | hlindroth@wisc.edu

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Bruce Fischl <fischl@nmr.mgh.harvard.edu>
Sent: Tuesday, June 26, 2018 12:27:35 PM
To: Freesurfer support list
Subject: Re: [Freesurfer] Adjusting/accounting for between scanner variance

Hi Heidi
what kind of study are you doing? Usually scanner is included as a nuisance
regressor, but you also want to make sure that you balance your subject
population across scanner as much as you can

cheers
Bruce

On Tue, 26 Jun 2018, Heidi Lindroth wrote:

>
> External Email - Use Caution
>
> Hi there,
> Is there a standard method to use for adjusting for between scanner variance? In the sample I am analyzing, 4 different
> scanners were used.
>
> Thank you,
>
> Heidi Lindroth BSN RN
> PhD Candidate | School of Nursing
> Program Assistant | School of Medicine and Public Health, Department of Anesthesiology
> Predoctoral Fellow | Veterans Administration (Madison WI)
>
> University of Wisconsin-Madison
> 701 Highland Avenue, Madison WI 53705
> 608-219-4294 | hlindroth@wisc.edu
>
>
>
>
>
>