imaging vs radioscopy

imaging and radioscopy both are nouns.

Word	Noun	Adjective	Verb	Adverb
imaging	Yes	No	No	No
radioscopy	Yes	No	No	No

As nouns, radioscopy is a hyponym of imaging; that is, radioscopy is a word with a more specific, narrower meaning than imaging:

imaging: (medicine) obtaining pictures of the interior of the body
radioscopy: (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation

imaging (noun)	radioscopy (noun)
(medicine) obtaining pictures of the interior of the body	(radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation
the ability to form mental images of things or events