Degradation of storage phosphor images due to scanning delay

WOS: 000236237800002PubMed ID: 16549432Objective: To evaluate the degradation of storage phosphor images relative to scanning delay. Methods: A series of exposures of an aluminium step-wedge with five 2 mm incremental steps were made using blue Digora (R) storage phosphor plates (SPPs). After the first exposure the plates were immediately scanned. After the second the plates were scanned after a half hour delay, after the third after a 1 h delay and so on until a final delay of 8 h. Mean grey values (MGVs) of each step of the wedge and its background were compared using repeated measures analysis of variance (ANOVA). Difference between group means was assessed using Bonferroni/Dunn multiple comparison test (P 0.05). Longer delays gave rise to significant differences in MGVs (P < 0.05). Conclusion: Diclorao (R) SPPs show statistically significant degradation of grey level values and contrast in plates scanned half an hour or longer after exposure

Effect of delayed scanning of storage phosphor plates

WOS: 000228655300017PubMed ID: 15829885Objective. To test longevity of image quality in storage phosphor plates (SPPs) at various exposure settings, storage conditions, and delays in scanning. Study design. Fifteen Digora plates were exposed from 0.08 to 0.20 seconds and scanned immediately, 10, 30, and 60 minutes, and 24 hours after exposure. Plates were stored both in daylight and in a light-tight box. Mean gray values (MGVs) were compared using 2 x 5 x 5 factorial ANOVA. Interaction between variables was tested using Bonferroni/Dunn multiple comparisons test. Results. MGVs decreased with increase in exposure but increased with the scan delay. Only MGVs of plates scanned within 10 minutes after exposure were not significantly different from the ones scanned immediately (P > .05). MGVs increased with scan delay for all exposure times no matter how the plates were stored (P < .05). Conclusion. Based on the time delays examined, it is recommended to scan the Digora SPP no later than 10 minutes after exposure. Longer periods may cause loss of quality