Response of optically stimulated luminescence dosimeters subjected to X-rays in diagnostic energy range

10th International Seminar on Medical Physics; 1st AMDI International Oncology Symposium

物理学;医药卫生

Musa, Y.^1,2 ; Hashim, S.^1 ; Karim, M.K.A.^1,3 ; Bakar, K.A.^4 ; Ang, W.C.^1 ; Salehhon, N.^1

Department of Physics, Universiti Teknologi Malaysia, Johor, Bahru Johor

81300, Malaysia^1

Centre for Energy Research and Training, Ahmadu Bello University, Zaria, Kaduna State

1014, Nigeria^2

Department of Diagnostic Imaging, National Cancer Institute, Precint 7, Putrajaya

62250, Malaysia^3

Department of Radiology, Hospital Sultanah Aminah, Johor, Bahru Johor

80100, Malaysia^4

关键词: Coefficient of variation;    Diagnostic radiology;    Dose linearity;    Dose measurement;    Optically stimulated luminescence;    Optically stimulated luminescence dosimeters;    Reproducibilities;    Tube currents;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/851/1/012001/pdf
DOI  :  10.1088/1742-6596/851/1/012001

学科分类：卫生学

来源: IOP

【 摘 要 】

The use of optically stimulated luminescence (OSL) for dosimetry applications has recently increased considerably due to availability of commercial OSL dosimeters (nanoDots) for clinical use. The OSL dosimeter has a great potential to be used in clinical dosimetry because of its prevailing advantages in both handling and application. However, utilising nanoDot OSLDs for dose measurement in diagnostic radiology can only be guaranteed when the performance and characteristics of the dosimeters are apposite. In the present work, we examined the response of commercially available nanoDot OSLD (Al2O3:C) subjected to X-rays in general radiography. The nanoDots response with respect to reproducibility, dose linearity and signal depletion were analysed using microStar reader (Landauer, Inc., Glenwood, IL). Irradiations were performed free-in-air using 70, 80 and 120 kV tube voltages and tube currents ranging from 10 - 100 mAs. The results showed that the nanoDots exhibit good linearity and reproducibility when subjected to diagnostic X-rays, with coefficient of variations (CV) ranging between 2.3% to 3.5% representing a good reproducibility. The results also indicated average of 1% signal reduction per readout. Hence, the nanoDots showed a promising potential for dose measurement in general X-ray procedure.