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Updated: Jun 6, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
A portable Compton spectrometer for clinical X-ray beams in the energy range 20-150 keV
A A Vieira1, A Linke, E M Yoshimura
1Departamento de Física, Pontifícia Universidade Católica de São Paulo, Rua Marquês de Paranaguá, 111-01303-050 São Paulo, SP, Brazil.
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.
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