An investigation of the imaging characteristics of the Y2O2S:Eu3+ phosphor for application in X-ray detectors of digital mammography.
Y2O2S:Eu laboratory prepared screens were evaluated as mammographic image receptors and were compared to similarly prepared screens of Gd2O2S:Tb and Y2O2S:Tb phosphor materials, often used in X-ray imaging detectors. The evaluation was performed by determining the Modulation Transfer Function (MTF) and the spatial frequency dependent Detective Quantum Efficiency (DQE). Y2O2S:Eu exhibited higher DQE values at low frequencies and given its good spectral matching with digital optical detectors, it may be appropriate for use in X-ray digital mammography.
Cavouras
D
D
Department of Medical Instrumentation Technology Techological Educational Institution of Athens, Greece.
Kandarakis
I
I
Panayiotakis
G S
GS
Kanellopoulos
E
E
Triantis
D
D
Nomicos
C D
CD
D005063:Europium; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008163:Luminescent Measurements; D008327:Mammography / Q000295:instrumentation* / Q000379:methods*; D008432:Mathematical Computing; D010087:Oxides; D013440:Sulfides; D014965:X-Rays; D015019:Yttrium
D010087:Oxides; D013440:Sulfides; D005063:Europium; D015019:Yttrium