[Noise properties in the fading of the imaging plate on a computed radiography system].

Fading of the imaging plate (IP) in computed radiography (CR) systems with photostimulable phosphors is known well. The relation between noise properties and the fading of the IP in a CR system was investigated. Uniform exposure for the IP with various times between exposure and readout for the same exposure was used for this study. The relative intensity of photostimulated emission and the digital Wiener spectra were calculated. The relative intensity of photostimulated emission decreased with increasing time, whereas Wiener spectral values showed no difference with increasing time. We concluded that noise properties were not affected by the fading of the IP in the CR system.