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

Trabalho apresentado em evento

Fecha

2009-12-01

Registro en:

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

1680-0737

http://hdl.handle.net/11449/71267

10.1007/978-3-642-03902-7-192

2-s2.0-77950124310

0250066159980825

0896348165708140

8630973561889272

http://repositorioslatinoamericanos.uchile.cl/handle/2250/3920468

Autor

Universidade Estadual Paulista (Unesp)

Federal University of Mato Grosso Do Sul

Institución

Universidade Paulista Júlio de Mesquita Filho (Brasil)

Resumen

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.