Medical image databases: a content-based retrieval approach.
Information contained in medical images differs considerably from that residing in alphanumeric format. The difference can be attributed to four characteristics: (1) the semantics of medical knowledge extractable from images is imprecise; (2) image information contains form and spatial data, which are not expressible in conventional language; (3) a large part of image information is geometric; (4) diagnostic inferences derived from images rest on an incomplete, continuously evolving model of [...]
Author(s): Tagare, H D, Jaffe, C C, Duncan, J
DOI: 10.1136/jamia.1997.0040184