Effect of Delayed Film Processing and Milliamperage Changes on Image Quality
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چکیده
A study of the effect of delayed clinical processing and milliamperage changes on image quality was carried out at the Radiology Department, University of Calabar, Nigeria, using filmstrips exposed to x-radiation at milliamperage (mA) values of 50, 100, 200, 300, 400 and 500. Exposed film strips were processed over varied post exposure, preprocessing keeping times ranging from 0 hours (control) to the 18th day. Results show progressive decrease in optical densities measured on the film, with prolonged pre-processing keeping time, and this is more marked at low (50) mA procedures, and is less in high (500) mA procedures, at which mA also, the onset was highly delayed (commencing about the 12th hour). The implication of this in a developing economy is discussed. ABSTRAIT Une étude de l'effet des changements cliniques retardés de traitement et de milliamperage sur la qualité d'image a été effectuée au service de radiologie, Université de Calabar, Le Nigéria, employer des filmstrips a exposé au xr a y o n n e m e n t a u x v a l e u r s d u milliamperage (mA) de 50, 100. 200. 300. 400 et 500. Les bandes exposées de film étaient post-exposition changé par excédent traité, garder de prétraitement chronomètre s'étendre de 0 heures (commande) au 18ème jour. Les résultats montrent la diminution progressive des densités optiques mesurées sur le film, avec le prétraitement prolongé gardant le temps, et ceci davantage est marqué aux procédures du bas (50) mA, et est moins (des 500) procédures élevées de mA, à quel mA également, le début a été fortement retardé (débutant au sujet de la 12ème heure). L'implication de ceci dans une économie se développante est discutée.
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تاریخ انتشار 2006