Dear Cyril,

Thank you for your reply.

Yes, I know this is only simulated bulk motion, and this is the one I exactly want to have now.

With best regards

Yuriko

From: Dr Cyril Pernet [mailto:[log in to unmask]]
Sent: woensdag 14 oktober 2015 17:07
To: Suzuki, Y. (RADI); [log in to unmask]
Subject: Re: [SPM] adding an artificial motion to digital phantom data

John and others will know better, but basically you want to change the orientation matrix in the file headers. For each file, apply a transformation using determined values. Note this will only simulated bulk motion which is well corrected, while motion on real data introduces many more artefacts.

Best

Cyril 

Sent from my HTC

----- Reply message -----
From: "Yuriko Suzuki" <[log in to unmask]>
To: <[log in to unmask]>
Subject: [SPM] adding an artificial motion to digital phantom data
Date: Wed, Oct 14, 2015 13:30

Dear SPM experts,

I am making sort of digital phantom data. Using a single 3D brain nii file, duplicating it … say 40 files … now I have 40 3D brain nii files without any motion.

I want to add an artificial motion to it. My initial plan was making a dummy text file of 6 motion parameters and doing reslice of realign using the dummy file. I expected that reslice process adds an artificial motion, instead of removing motion, because my data does not have any motion. However, even though I put the  dummy text file into the same folder as image files, reslice only generate image file with ”r” prefix without any motion.

If you have any idea, could you share with me, please?

Thank you very much.

Yuriko