adj. (in CT scanning) describing a structure or substance (e.g. gas) that is less dense than surrounding structures (allows more X-rays to pass through) and therefore appears darker on CT. Compare hyperintense.
adj. (in CT scanning) describing a structure that is denser than surrounding structures (allows fewer X-rays to pass through) and therefore appears brighter on CT; for example, bones and calcifications. Compare hypointense.... hyperintense
Health Encyclopedia