Open pipitone opened 9 years ago
We could make a visual print out of them, but I've never heard of this before.
Phase maps are a bit tricky, not only because of phase-wrapping but due to the arbitrary phase values from the scanner (If not calculated directly from the raw complex data).
One method that I have seen before is to look at the phase derivative. Here's one example of that: http://www.tnw.tudelft.nl/fileadmin/Faculteit/TNW/Over_de_faculteit/Afdelingen/Imaging_Science_and_Technology/Research/Research_Groups/Quantitative_Imaging/Publications/List_Publications/doc/Supri_asci01.pdf
Generally, regardless of the absolute value, the rate of change should be more smoothly varying under less noisy conditions.
Do we need to consider the derivative in all directions or just the phase-encoding direction?
Right now we don't have a way of including field maps in our QC pipeline. Is there something we could/should be doing with these field maps that would provide an indication of scan quality/integrity?