Sensitometric effects of varying the intensifying screens used with Agfa Dentus ST8G and RP6 panoramic radiographic films

Dento Maxillo Facial Radiology
M WakohK Kuroyanagi

Abstract

To compare the sensitometric effects and information yield of varying the intensifying screens used with both Dentus ST8G and RP6 Agfa Gevaert, Dormagen, Germany panoramic radiographic films. Four screen-film combinations were employed for each of the two film types. The screens used were blue fluorescing PX-III (Kasei Optonix, Tokyo, Japan) and Special (Siemens AG, Bensheim, Germany), as well as green fluorescing Lanex Regular (Eastman Kodak, Rochester, NY, USA) and Trimax T16 (3M, Mineapolis, Minnesota, USA). The density response for each screen-film combination was evaluated using the characteristic curves generated. Information yield, as determined by the radiographic detection of defects in an aluminium test object, was evaluated by nine observers. The characteristic curves for ST8G were different when green and blue fluorescing screens were used; however, those for RP6 varied little irrespective of the choice of intensifying screens. Observers were able to perceive defects at significantly lower radiation exposures for ST8G combined with green fluorescing screens compared with blue emitting screens. RP6 with all screen combinations provided similar image detail perceptibility at comparable exposures with ST8G with green-f...Continue Reading

References

Nov 1, 1976·Radiology·R P RossiC R Ahrens
Jul 7, 1970·British Dental Journal·B Cooke
Apr 1, 1984·Oral Surgery, Oral Medicine, and Oral Pathology·C E Hurlburt, L J Coggins
Mar 1, 1982·Oral Surgery, Oral Medicine, and Oral Pathology·G E Kaugars, P Fatouros

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Citations

Feb 15, 2001·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·M WakohK Kuroyanagi
Jun 27, 2006·Dento Maxillo Facial Radiology·G KaepplerS Reinert
Sep 9, 2004·Archives of Oral Biology·Rodrigo Borges FonsecaCarlos José Soares

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