Performance of a pencil ionization chamber in various radiation beams.
Pencil ionization chambers were recommended for use exclusively in the computed tomography (CT) dosimetry, and, from the start, they were developed only with this application in view. In this work, we studied the behavior of a pencil ionization chamber in various radiation beams with the objective of extending its application. Stability tests were performed, and calibration coefficients were obtained for several standard radiation qualities of the therapeutical and diagnostic levels. The results show that the pencil ionization chamber can be used in several radiation beams other than those used in CT.
Maia
Ana F
AF
Instituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, Caixa Postal 11049, CEP 05422-970, São Paulo, Brazil.
Caldas
Linda V E
LV
D002138:Calibration; D008327:Mammography / Q000295:instrumentation / Q000379:methods / Q000592:standards; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods / Q000592:standards; D011874:Radiometry / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013679:Technology, Radiologic / Q000295:instrumentation / Q000379:methods / Q000592:standards; D014965:X-Rays