Monthly monitoring program on DryView laser imager: one year experience on five Imation units.
Dry-processing film systems have become popular particularly in a network environment. This is mainly due to its ability to produce high quality images without wet chemistry processing. In this paper we describe a monthly monitoring program on five Model 8700 DryView Laser Imagers in our institution. A SMPTE pattern is generated via DryView Laser Imager software. The 100% patch is used for checking the base-plus-fog of the Imager. The 40% patch is used as the speed index. The optical density difference between patches 10% and 70% is used as the contrast index. These numbers are plotted for testing system consistency. In addition, the SMPTE pattern is examined to verify the sharpness of the bar patterns and the visibility of subtle contrasts-95% inset in the 100% patch and a 5% inset in the 0% patch. The clinical films are checked for processor artifacts, such as residuals from the drum. Stability of the dry processors has also been studied using three strips per day obtained at three different times of the day over a period of ten consecutive working days. The coefficient of variation is 0.05 for the speed index and 0.04 for the contrast index. The monthly monitoring program has been carried out in our institution since January 1997. The problems found by this monthly monitoring program assess the necessity of routine QC for DryView Laser Imagers. The instability of the post-processing dry silver films, and, consequently, the film handling requirements, are also discussed.
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Department of Radiology, Columbia University, New York, New York 10032, USA. zfl1@columbia.edu
Nickoloff
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Terilli
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D055592:Biophysical Phenomena; D001703:Biophysics; D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation* / Q000592:standards / Q000706:statistics & numerical data; D007834:Lasers / Q000592:standards; D011786:Quality Control; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation / Q000592:standards; D012984:Software; D013997:Time Factors; D014962:X-Ray Film / Q000592:standards