I. Kandarakis, D. Cavouras, G. Panayiotakis, E. Papadopoulou, C. Nomicos
{"title":"Signal propagation in rare earth image receptors for digital mammography applications","authors":"I. Kandarakis, D. Cavouras, G. Panayiotakis, E. Papadopoulou, C. Nomicos","doi":"10.1109/IEMBS.1996.652001","DOIUrl":null,"url":null,"abstract":"Signal conversion and propagation in image receptors were studied employing laboratory prepared Gd/sub 2/O/sub 2/S:Tb and La/sub 2/O/sub 2/S:Tb phosphor screens. The optical signal emitted by the screens per unit of X-ray exposure was experimentally and theoretically evaluated in the mammographic energy range. Parameters related to signal propagation (light absorption, scattering, reflection, and optical pulses statistical distribution), intrinsic X-ray to light conversion efficiency, and electron signal generated by the photodetector were studied. Image receptors employing Gd/sub 2/O/sub 2/S:Tb screens produce higher optical and electron signal intensities whereas receptors with La/sub 2/O/sub 2/S:Tb screens give better optical pulse statistics, resulting in noise reduction.","PeriodicalId":20427,"journal":{"name":"Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"9 1","pages":"840-841 vol.2"},"PeriodicalIF":0.0000,"publicationDate":"1996-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEMBS.1996.652001","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Signal conversion and propagation in image receptors were studied employing laboratory prepared Gd/sub 2/O/sub 2/S:Tb and La/sub 2/O/sub 2/S:Tb phosphor screens. The optical signal emitted by the screens per unit of X-ray exposure was experimentally and theoretically evaluated in the mammographic energy range. Parameters related to signal propagation (light absorption, scattering, reflection, and optical pulses statistical distribution), intrinsic X-ray to light conversion efficiency, and electron signal generated by the photodetector were studied. Image receptors employing Gd/sub 2/O/sub 2/S:Tb screens produce higher optical and electron signal intensities whereas receptors with La/sub 2/O/sub 2/S:Tb screens give better optical pulse statistics, resulting in noise reduction.
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