Psychophysical properties of a new F-speed intraoral film

Dento Maxillo Facial Radiology
M MastorisG Li

Abstract

To compare the psychophysical properties of the new Kodak InSight F-speed intraoral dental film with those for the E-speed Ektaspeed Plus film by means of the perceptibility curve (PC) test. A specially designed test object was used. The test object was made of aluminium and was 10 mm thick. It contained ten holes, contrast details, with the same diameter of 1.5 mm but with different depths. The depths ranged from 0.03 mm to 0.30 mm in steps of 0.03 mm. The holes were placed randomly within a square area with a total of 16 possible positions. Radiographs of the test object were obtained over the full exposure ranges of the two films. A Combex DX-907 dental X-ray unit was used operating at 10 mA and two tube potentials, 70 kVp and 90 kVp. The focus-to-object distance was 50 cm. Ten observers evaluated the radiographs under uniform artificial lighting using a view box and stated the number of perceptible representations of contrast details. In order to construct perceptibility curves, absolute values of the reciprocal of the minimum perceptible logarithmic exposure differences, 1/(DeltalogE)min, were plotted as functions of the logarithm of exposures, logE, registered by the tested films. Comparisons between the two films were ma...Continue Reading

References

Dec 1, 1983·Oral Surgery, Oral Medicine, and Oral Pathology·U WelanderC R Morris
May 9, 1998·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·E M TjelmelandD J Buikema
Aug 7, 1998·Dento Maxillo Facial Radiology·K YoshiuraG Tronje
Oct 16, 1999·Dento Maxillo Facial Radiology·H C StamatakisW D McDavid
Feb 15, 2001·Dento Maxillo Facial Radiology·C Price

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Citations

Apr 2, 2011·Medical Mycology·Wiley A SchellJ Andrew Alspaugh

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