Characterization of OSL dosemeters for application in dose evaluation in computerized tomography procedures

This work aims to present results of the characterization of Al₂O₃:C optically stimulated luminescent detector (OSLD). The following aspects were studied: sensitivity, energy response and air kerma dependence in computed tomography (CT) energy range. The main objective of this work is to evaluate the applicability of this kind of dosimeter for CT organ dose assessment. The energy response showed a non-homogenous pattern which has already been found in literature. The air kerma dependence of OSL signal showed a linear trend. Concerning their sensitivity, it was observed that the same batch can have different responses for the same quality, after a second irradiation step, which shows that this kind of detector should be used with care in case of more than one irradiation. (author)