Image Quality Assessment of a CMOS/Gd2O2S:Pr,Ce,F X-ray Sensor

International Conference on Bio-Medical Instrumentation and related Engineering and Physical Sciences

物理学;医药卫生

Michail, C.M.^1 ; Seferis, I.E.^2 ; Sideras, T.^1 ; Valais, I.G.^1 ; Fountos, G.P.^1 ; Bakas, A.^3 ; Panayiotakis, G.S.^4 ; Kandarakis, I.S.^1

Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, Department of Biomedical Engineering, Technological Educational Institute of Athens, Egaleo, Athens

122 10, Greece^1

Faculty of Chemistry, Wroclaw University, 14F Joliot-Curie Street, Wroclaw

50-383, Poland^2

Medical Radiological Technology, Faculty of Health and Caring Professions, Technological Educational Institute of Athens, Athens

122 10, Greece^3

Department of Medical Physics, Faculty of Medicine, University of Patras, Patras

265 00, Greece^4

关键词: Detector response functions;    Gadolinium oxysulfides;    Image quality assessment;    Imaging properties;    Inorganic scintillator;    Phosphor technologies;    Powder scintillator;    Quality performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/637/1/012018/pdf
DOI  :  10.1088/1742-6596/637/1/012018

学科分类：卫生学

来源: IOP

【 摘 要 】

The aim of the present study was to examine the image quality performance of a CMOS digital imaging optical sensor coupled to custom made gadolinium oxysulfide powder scintillators, doped with praseodymium, cerium and fluorine (Gd2O2S:Pr,Ce,F) screens. The screens, with coating thicknesses 35.7 and 71.2 mg/cm2, were prepared in our laboratory from Gd2O2S:Pr,Ce,F powder (Phosphor Technology, Ltd) by sedimentation on silica substrates and were placed in direct contact with the optical sensor. Image quality was determined through a single index image quality parameter (information capacity). The CMOS sensor/Gd2O2S:Pr,Ce,F screens combinations were irradiated under the RQA-5 (IEC 62220-1) beam quality. The detector response function was linear for the exposure range under investigation. Under the general radiography conditions, both Gd2O2S:Pr,Ce,F screen/CMOS combinations exhibited comparable overall imaging properties, in terms of the information capacity, to previously published scintillators, such as Gd2O2S:Eu.