yup, i tend to agree. although the picture was not too good to tell...
a.
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Von: FSL - FMRIB's Software Library [[log in to unmask]] im Auftrag von Martin Kavec [[log in to unmask]]
Gesendet: Freitag, 7. Januar 2011 12:28
An: [log in to unmask]
Betreff: Re: [FSL] AW: [FSL] Philips DTI data artifacts
Hi,
2) would be quite certainly motion related as well, but this time to CSF pulsation motion of the tissue.
Martin
On Fri, Jan 7, 2011 at 12:23 PM, Andreas Bartsch <[log in to unmask]<mailto:[log in to unmask]>> wrote:
Hi,
1) is definitely not the vibration artefact but almost certainly motion-related.
Andreas
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Von: FSL - FMRIB's Software Library [[log in to unmask]<mailto:[log in to unmask]>] im Auftrag von Shugao Xia [[log in to unmask]<mailto:[log in to unmask]>]
Gesendet: Donnerstag, 6. Januar 2011 20:44
An: [log in to unmask]<mailto:[log in to unmask]>
Betreff: [FSL] Philips DTI data artifacts
Hi,
I am sorry to post again. I red the old archives about dti atifacts, but I am still not clear about artifacts in my dti data with 32 directions and 1 b0 image, which are acquired in Philips 3T sanner.
1) signal drop-out in axial slices in a limit numbers of slices of a limit numbers of gradient directions, see the attached fig1 (the right one is drop-out slice), I am not sure that this is vibration artifact, often happened in Siemens, or head motion artifact?
2) Zebra line in cerebellum happened in most gradients directions in dti images of all the subject, see the attached fig2. It is normal or artifacts?
Thank you very much
Shugao
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