PZT FOR MEASURING ENERGY FLUENCE RATE of X-RAY USED IN SUPERFICIAL CANCER THERAPY
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Data
2010-01-01
Autores
Pontes, Wesley
de Carvalho, Aparecido Augusto [UNESP]
Sakamoto, Walter Katsumi [UNESP]
de Paula, Mauro Henrique
Sanches, Marcelo A. A.
de Freitas, Ricardo L. B.
Cesar, Regina Borges P.
Piubeli, Sergio L.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Taylor & Francis Inc
Resumo
A PZT detector is used for measuring the energy fluence rate of X-ray pulses produced by superficial cancer therapy equipment (orthovoltage range). The instrument consists of a pyroelectric sensor, a low-noise high-sensitivity, current-to-voltage converter, a microcontroller and a digital display. The main element of the instrument is a pyroelectric sensor which consists of an iron-doped lead zirconate titanate ceramic disk. The response of the instrument exhibits a nonlinear relationship with the energy fluence rate of the radiation and the precision is better than 3%. The equipment is inexpensive, rugged, simple to construct, and has good long-term stability.
Descrição
Palavras-chave
energy fluence rate, orthovoltage range, pyroelectric sensor, radiation, superficial cancer, X-ray
Como citar
Instrumentation Science & Technology. Philadelphia: Taylor & Francis Inc, v. 38, n. 3, p. 210-219, 2010.