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Air kerma reference field with high energy photons using a 15 MeV electron beam from a clinical linear accelerator.
Ishii, Junya; Shimizu, Morihito; Kato, Masahiro; Kurosawa, Tadahiro; Watabe, Hiroshi.
Afiliación
  • Ishii J; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
  • Shimizu M; Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan.
  • Kato M; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
  • Kurosawa T; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
  • Watabe H; National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
J Radiol Prot ; 44(1)2024 Jan 25.
Article en En | MEDLINE | ID: mdl-38232406
ABSTRACT
In the medical and nuclear fields, there are environments where exposure to photons with energies above several MeV can result in problems. The National Metrology Institute of Japan has developed a high-energy photon field using a 15 MeV electron beam of a clinical linear accelerator with a copper target and an aluminium filter unit to facilitate dosimeter calibration in terms of air kerma. To determine the air kerma rate, the energy fluence distribution at a reference point was calculated, and both calculations and experiments evaluated the effective energy and spatial dose distribution. Moreover, to validate the air kerma measurement, two commercial cavity chambers were calibrated in a developed photon field. The results obtained exhibited a 4% difference compared with those in a Co-60γ-ray reference field.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radiometría / Electrones País/Región como asunto: Asia Idioma: En Revista: J Radiol Prot Asunto de la revista: RADIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Radiometría / Electrones País/Región como asunto: Asia Idioma: En Revista: J Radiol Prot Asunto de la revista: RADIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Reino Unido