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Proceedings Paper

Environment influence on PSPL-based digital dental radiology systems
Author(s): Eduardo Tavares Costa; Jorge Andre G. Albuquerque; Francisco H. Neto; Gisela A. Paganinni; Frab N. Boscolo; Ana Emilia F. de Oliveira
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Paper Abstract

Photo-stimulable phosphor luminescence technology (PSPL) has been used in Digora (Soredex, Finland) and Denoptix (CEDH Gendex, Italy) digital dental radiology imaging systems. PSPL plates store X-ray energy during exposition, being later processed by a laser reader and digitizer. Afterward they are erased and re-used. The large band of energy absorption provides PSPL systems with an extensive dynamic scale but at the same time a high sensibility to the incoming noise of environmental radiations. We have measured environment influences (electromagnetic radiation) for Digora and Denoptix plates after X-ray exposure and before digital processing. We have first compared the processing of PSPL plates 'in dark' against 'in light' environments. In another experiment, the exposed plates were also processed after being positioned 10 cm away from a 17 inches video monitor screen and to its laterals for 5, 10, 15, 20, 25 and 30 minutes (plates protected against light). The acquired images were used to calculate the noise power spectra (NPS) in each case. We have noticed that there was an increase in the noise spectra energy of 'in light' processing compared to 'in dark' processing. There was also an increment in the NPS energy when the images were processed after the exposition of the plates to the radiation emanated from video monitor.

Paper Details

Date Published: 28 June 2001
PDF: 8 pages
Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001);
Show Author Affiliations
Eduardo Tavares Costa, Univ. Estadual de Campinas (Brazil)
Jorge Andre G. Albuquerque, Univ. Estadual de Campinas (Brazil)
Francisco H. Neto, Univ. Estadual de Campinas (Brazil)
Gisela A. Paganinni, Univ. Estadual de Campinas (Brazil)
Frab N. Boscolo, Univ. Estadual de Campinas (Brazil)
Ana Emilia F. de Oliveira, Univ. Estadual de Campinas (Brazil)

Published in SPIE Proceedings Vol. 4320:
Medical Imaging 2001: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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