Feasibility study of the use of a silicon photomultiplier coupled to a scintillator for kVp measurement based on spectrometry
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Radiation Physics and Chemistry
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This study proposes a spectroscopic and non-invasive approach to measure the kVp of an X-ray tube using a silicon photomultiplier (SiPM) coupled to a GaGG scintillator crystal. Several experimental setups were explored to assess the feasibility and performance in measuring the kVp based on international standards IEC 61267:2005 and IEC 61676:2002. The energy spectrum was obtained through pulse height analysis. System calibration was performed using radioactive sources emitting characteristic X-rays and gamma radiation. Determination of the maximum energy of the X-ray spectrum was based on a linear regression aiming for a goodness of fit to reduce uncertainty in kVp. The approach was successfully evaluated for specific radiology beams, including mammography, with a maximum uncertainty of 6.5% in the kVp values for the tested beam qualities.
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SILVA, JONATHAN R. da; MURATA, HELIO M.; SANTOS, LEONARDO C. dos; ALCANTARA NUNEZ, JUAN A.; CARVALHO, DIEGO V. de S.; SANTOS, ADELSON D. dos; BANOS RODRIGUEZ, UBALDO; POTIENS, MARIA da P. A.; BONIFACIO, DANIEL A. B. Feasibility study of the use of a silicon photomultiplier coupled to a scintillator for kVp measurement based on spectrometry. Radiation Physics and Chemistry, v. 229, p. 1-9, 2025. DOI: 10.1016/j.radphyschem.2024.112435. Disponível em: https://repositorio.ipen.br/handle/123456789/49952. Acesso em: 10 Jun 2026.
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