hi, a question about imaging resolution,
Recall that in photon imaging, electron imaging etc. the resolution obtainable is on the
order of the wavelength of the imaging radiation. Why is that? Comment on whether that
holds true for MRI at, say, 1.5 Tesla (note: resolution of a typical clinical image is on the
order of 1 mm). How can this be?

Question

hi, a question about imaging resolution,
Recall that in photon imaging, electron imaging etc. the resolution obtainable is on the
order of the wavelength of the imaging radiation. Why is that? Comment on whether that
holds true for MRI at, say, 1.5 Tesla (note: resolution of a typical clinical image is on the
order of 1 mm). How can this be?

anonymous · Answer

All electromagnetic waves have a physical wavelength. If a wavelength cannot be passed (to detect the absence of ) nor reflected (to detect the presence of) then the object cannot be detected. An example is the screen mesh on the door to your microwave. the openings are larger than light waves yet smaller than microwaves. The MRI works on the presence or absence of water to emit waves rather than reflect them. So it would still hold true I guess but for a different reason.