Title :
Image transfer characteristics of europium activated scintillators for medical imaging applications
Author :
Cavouras, Dimisis ; Kandarakis, Ioannis ; Theocharakis, Ioannis ; Panayiotakis, George ; Nomicos, Constantine
Author_Institution :
Depts. of Med. Instrum. Technol. & Electron., Technological Educ. Inst. of Athens, Greece
fDate :
31 Oct-3 Nov 1996
Abstract :
Image transfer characteristics (MTF, DQE) of Y2O2 S:Eu, Y2O3:Eu, and YVO4:Eu image receptors were evaluated. These materials were used in the form of laboratory prepared screens. MTF was experimentally determined by the square wave response method and theoretically evaluated by a diffusion equation model. DQE was calculated using experimentally determined optical data of the scintillators. Light spectra were measured and their compatibility to the spectral sensitivity of various photodetectors was calculated. The MTF and DQE of Y2O2S:Eu were better than those of Y2O3:Eu, which was superior to YVO4:Eu. The spectral compatibility of the three scintillators was very good to excellent (0.7 to 0.95), being better than that of some commercially used scintillators
Keywords :
X-ray detection; biomedical equipment; biomedical imaging; brightness; europium; fluorescent screens; image intensifiers; optical transfer function; phosphors; photodetectors; scintillation; yttrium compounds; Eu activated scintillators; MTF; Y2O2S:Eu; Y2O3:Eu; YVO4:Eu; detective quantum efficiency; diffusion equation model; image receptors; image transfer characteristics; laboratory prepared screens; medical imaging; phosphors; photodetectors; spectral compatibility; spectral sensitivity; square wave response method; Biomedical imaging; Biomedical optical imaging; Charge coupled devices; Educational technology; Optical films; Optical materials; Optical sensors; Photodetectors; Testing; X-rays;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.652000
