297,812 SCIENTIFIC 73rd Scientific Assembly and Annual Meeting of the Radiological Society of North America including sessions in jouint sponsorship with the American Association of Physicists in Medicine November 29-December 4, 1987 Chicago : RSNA Scientific program. — [Easton] : RSNA, 1987. — 556, [1] s. ; 29 cm (Radiology, ISSN 0033-8419 ; vol. 165, suppl.]