[MRIStudio-users] [Mristudio-users] MRI - Head Motion issue

[Barbara Kreilkamp]

Dear Dr Mohammad,

This paper you are referring to (Yendiki et al. 2013 neuroimage) reports 
on the methods used to correct for motion and the spurious group 
differences present even when accounting for motion with special 
correction tools.

If there are differences in motion between groups that you are 
comparing, then yes, motion can be have confounding effects on your 
results even if they have been 'corrected'. This is because motion 
always also means loss of information (e.g. slice dropout etc.) which 
cannot be easily mitigated.

FSL and Freesurfer (Tracula) offer tools to extract motion parameters 
for individual subjects so you can compare gross motion across groups 
and account for it in your analysis. It's always a great idea to 
visually check your unprocessed DTI data as well for any signal loss etc.

Best wishes,

Barbara



On 27/03/2017 14:56, Michael McLane wrote:
> FYI -  ?
> ________________________________________
> From: mristudio-users <mristudio-users-bounces at mristudio.org> on behalf of Shaimaa Abdelsattar <shaimaa96 at hotmail.com>
> Sent: Sunday, March 26, 2017 2:05 PM
> To: MRI Studio
> Subject: [Mristudio-users] Head Motion issue
>
> Hello,
> There are papers in the literature discussing the effect of head motion on DTI analysis as it can induce spurious differences among groups. I would like to ask if this motion is still a concern even after eddy current correction and registration into b0 image using AIR tool in DTI studio for tractography.
> Thank you in advance
> Dr.Shaimaa Mohammad, MD
>
> Sent from my iPad
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