| Texto completo | |
| Autor(es): |
Giansante, Louise
[1]
;
Santos, Josilene C.
[1]
;
Umisedo, Nancy K.
[1]
;
Terini, Ricardo A.
[1]
;
Costa, Paulo R.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Phys, Nucl Phys Dept, Sao Paulo - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS; v. 47, p. 16-22, MAR 2018. |
| Citações Web of Science: | 2 |
| Resumo | |
This study describes the characterization of an Al2O3:C OSLD (Landauer's Luxel T tape) for dose evaluation in Computed Tomography. The irradiations were conducted using both a constant potential X-ray equipment and a 64-slice clinical CT scanner, and the readouts were performed using a Riso TL/OSL reader. The following aspects were studied: batch homogeneity, energy response, linearity of dose response, reproducibility, reusability, and effect of uncertainties with the normalization of OSL signals per their response to beta radiation. A group of 330 dosimeters from the 452 irradiated with the same dose presented OSL signals within the interval of 4.7% from the average. The dosimeters presented energy-dependent response in good agreement with results found in the literature. The air kerma response of the OSL signal showed a linear trend for both the constant potential X-ray device and the clinical CT scanner, with differences in their slopes of approximately 10%. Reproducibility, reusability, and effect of beta normalization were analyzed by separating 72 dosimeters in 3 groups. The results obtained in this study together with those of previous works indicate that this type of dosimeter is adequate for dose evaluation in CT clinical applications. (AU) | |
| Processo FAPESP: | 08/57863-2 - P&D em metrologia das radiações |
| Beneficiário: | Linda Viola Ehlin Caldas |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |