Chief Technologist MR research
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Erasmus Medical Center Rotterdam
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-----Original Message-----
From: Bart Schraa [mailto:[log in to unmask]]
Sent: donderdag 21 augustus 2003 20:10
To: [log in to unmask]
Cc: [log in to unmask]
Subject: Some questions
Dear All,
I have a few questions regarding the use of SPM:
- How come there are different results when the model (boxcar -
fingertapping) is setup by using one trial or two trials, respectively rest
ans active?
- Why do we need to 'determine the parameters' first for coregistering the
anatomy data, and then use the outcoming .mat file for the writing of the
EPI images? Is there any difference with 'determine and write parameters'?
- I have seen that when using the T1 image template sometime the
normalization is not fully correct, but with using the filT1 template is
does a correct normalization? What is the difference between the two, and
when should we use one or the other?
- When I use a different T1, e.g. 3D T1 (SPGR), the EPI images do not
overlay on the anatomical images in the right way. The only way to get this
done is normalize the EPI to the EPI template. Would it be the most correct
method to normalize the T1 to the T1 template and the EPI to the EPI
template? Any problems occurring with this method? I would think that the
EPI data needs a slightly other normalization than the T1 data?
Thanks for your input,
Bart.
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