258,248 SCIENTIFIC 74th Scientific Assembly and Annual Meeting of the Radiological Society of North America including sesions in joint sponsorship with the American Association of Physicists in Medicine November 27-December 2, 1988 Chicago : RSNA Acientific program. - [Easton] : RSNA, 1988. - 601, [1] s. ; 29 cm (Radiology, ISSN 0033-8419 ; vol. 169 (P.) suppl.)