Title :
Study of the readout of a storage phosphor screen with APDs
Author :
Bruyndonckx, P. ; Zanca, F. ; Tavernier, S.
Author_Institution :
IIHE, Vrije Univ., Brussels, Belgium
Abstract :
We have built a readout system using avalanche photodiodes as a photodetector in computed radiography systems based on storage phosphor screens. The advantages of APDs are the higher quantum-efficiency at 390 nm and their compactness allowing a better light collection efficiency. The APD shot noise and amplifier noise were determined and compared with the intrinsic image noise. The imaging performance of the complete readout system has been analyzed by measuring the light collection efficiency, signal-to-noise ratio, modulation transfer function and noise power spectrum
Keywords :
X-ray detection; avalanche photodiodes; biomedical equipment; diagnostic radiography; fluorescent screens; optical transfer function; phosphors; photodetectors; semiconductor device noise; shot noise; 390 nm; amplifier noise; avalanche photodiodes; compactness; computed radiography system; higher quantum-efficiency; imaging performance; intrinsic image noise; light collection efficiency; modulation transfer function; noise power spectrum; optical bandpass filter; photodetector; readout system; shot noise; signal-to-noise ratio; storage phosphor screen; Avalanche photodiodes; Image analysis; Noise measurement; Performance analysis; Phosphors; Photodetectors; Power measurement; Radiography; Signal analysis; Signal to noise ratio;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949399
