title: A portable Compton spectrometer for clinical X-ray beams in the energy range 20-150 keV.
abstract: Primary beam spectra were obtained for an X-ray industrial equipment (40-150 kV), and for a clinical mammography apparatus (25-35 kV) from beams scattered at angles close to 90°, measured with a CdTe Compton spectrometer. Actual scattering angles were determined from the Compton energy shift of characteristic X-rays or spectra end-point energy. Evaluated contribution of coherent scattering amounts to more than 15% of fluence in mammographic beams. This technique can be used in clinical environments.
authors.affiliation: Departamento de Física, Pontifícia Universidade Católica de São Paulo, Rua Marquês de Paranaguá, 111-01303-050 São Paulo, SP, Brazil.
authors.forename: A A
authors.initials: AA
authors.lastname: Vieira
authors.forename: A
authors.initials: A
authors.lastname: Linke
authors.forename: E M
authors.initials: EM
authors.lastname: Yoshimura
authors.forename: R A
authors.initials: RA
authors.lastname: Terini
authors.forename: S B
authors.initials: SB
authors.lastname: Herdade
mesh_terms: D008327:Mammography / Q000379:methods; D012542:Scattering, Radiation; D013052:Spectrometry, X-Ray Emission / Q000295:instrumentation* / Q000379:methods