title: Anniversary paper: fifty years of AAPM involvement in radiation dosimetry.
abstract: This article reviews the involvement of the AAPM in various aspects of radiation dosimetry over its 50 year history, emphasizing the especially important role that external beam dosimetry played in the early formation of the organization. Topics covered include the AAPM's involvement with external beam and x-ray dosimetry protocols, brachytherapy dosimetry, primary standards laboratories, accredited dosimetry chains, and audits for machine calibrations through the Radiological Physics Center.
authors.affiliation: Radiological Physics Center University of M. D. Anderson Cancer Center, Houston, Texas 77030-4009, USA.
authors.forename: G
authors.initials: G
authors.lastname: Ibbott
authors.forename: C-M
authors.initials: CM
authors.lastname: Ma
authors.forename: D W O
authors.initials: DW
authors.lastname: Rogers
authors.forename: S M
authors.initials: SM
authors.lastname: Seltzer
authors.forename: J F
authors.initials: JF
authors.lastname: Williamson
mesh_terms: D017410:Practice Guidelines as Topic; D011874:Radiometry / Q000592:standards* / Q000639:trends*; D011878:Radiotherapy / Q000592:standards* / Q000639:trends*; D012952:Societies / Q000639:trends*; D014481:United States