Hi "Science.Medical.Imaging List",
thanks for your clear explaination
> For a 3D CT case, I assume you are talking about resampling an already
> digitized image data. Is that correct?
yes, indeed!
> If so, you will need to find
> out the highest frequency of a feature that you dont want to lose in
> the image after resampling.
ok!
> If the image is not isotropic (has
> different frequency along three dimensions), you will need to repeat
> this for all three directions and get the highest frequency of all for
> simplicity.
Do you know where/whether this problem is treated in literature? I
think you are right, but I also think such a constriction is not so
strict: i.e. if I have a voxel spacing of (0.15mm)x(0.15mm)x(0.3mm) I
have to consider the 0.3mm and the feature I'm looking for should be
"greater" then 2*0.3=0.6mm. That is a lower bound limit, and I also
think it is correct. But in my opinion the lower bound can be less
then 0.6 (i.e. resampling the image through interpolation), just
because 0.3 of z is twice the 0.15 of x an y, so resampling the image
through interpolation will not create any artifact.
Am I right?
> Hope this helps.
definitely! thanks!
Mauro
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