Pim vanOoij
Thu. 19 Mar.09,
09:58
[Reply (2 of 3) to:
'PCA aliasing problem'
started by: 'Pim vanOoij'
on Fri. 27 Feb.09]
 Category:
Artifacts
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| PCA aliasing problem |
This is not spatial aliasing I am talking about, but velocity aliasing. This means that when your velocity encoding parameter is set to 100 cm/s and true velocity in a certain pixel is 120 cm/s, the measured velocity will be -80 cm/s.
In my problem however, with a velocity encoding parameter of 100 cm/s, in certain pixels I measure a velocity of around -60 cm/s where an actual velocity of 40 cm/s exists, which is a real mystery to me.
I don't think increasing FOV will prevent this from happening. Maybe it has something to do with velocity aliasing in other parts of the FOV, where true flow velocity of 110-120 cm/s exists, but I wouldn't know why. Anyone? Thanks.
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