Measurement of orthovoltage X-ray intensity with a lithium niobate transducer

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Pontes, Wesley [UNESP]
De Carvalho, Aparecido Augusto [UNESP]
Sanches, Marcelo Augusto Assunção [UNESP]
De Freitas, Ricardo Luiz Barros [UNESP]
De Paula, Mauro Henrique
Sakamoto, Walter Katsumi [UNESP]

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A microcontrolled instrument for measuring the energy fluence rate (or intensity) of X-ray pulses in the orthovoltage range of 120 to 300 kV is described. The prototype instrument consists of a pyroelectric sensor, a low-noise highsensitivity current-to-voltage converter, a microcontroller and a digital display. The response of the instrument is nonlinear with the intensity of the radiation. The precision is better than 3%. The equipment is inexpensive, rugged, simple to construct and has good long-term stability. © 2009 Springer-Verlag.



Energy fluence rate, Microcontrolled instrument, Orthovoltage range, Pyroelectric sensor, X-ray intensity, Energy fluences, Orthovoltage, Pyroelectric sensors, X ray intensity, Biomedical engineering, Dosimetry, Instruments, Lithium, Niobium compounds, Physics, Radiation shielding, Sensors, X rays, Biological radiation effects

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IFMBE Proceedings, v. 25, n. 3, p. 667-670, 2009.