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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characterization of OSL dosimeters for use in dose assessment in Computed Tomography procedures

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Author(s):
Giansante, Louise [1] ; Santos, Josilene C. [1] ; Umisedo, Nancy K. [1] ; Terini, Ricardo A. [1] ; Costa, Paulo R. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Phys, Nucl Phys Dept, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS; v. 47, p. 16-22, MAR 2018.
Web of Science Citations: 2
Abstract

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)