tomography vs imaging

tomography and imaging both are nouns.

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

As nouns, tomography and imaging are synonyms defined as:

tomography and imaging: (medicine) obtaining pictures of the interior of the body

tomography (noun)	imaging (noun)
(medicine) obtaining pictures of the interior of the body	(medicine) obtaining pictures of the interior of the body
	the ability to form mental images of things or events