Faster screen/film combinations for cephalometric radiography

Hurlburt, Charles E.

doi:10.1016/0030-4220(81)90088-8

Cited by 19 publications

(2 citation statements)

References 4 publications

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“…A number of authors have compared the diagnostic quality of the radiographs when using rare earth intensifying screens to those obtained with conventional intensifying screens (1-5). The majority have reported that the diagnostic quality is not lessened (1)(2)(3)(4)(5). In some respects the image quality was even improved (2,3,5).…”

Section: Review^ Of Literaturementioning

confidence: 99%

Reduction of body doses in rotational panoramic radiography by means of reduced beam width in combination with rare earth intensifying screens

Aagaard

Sewerin

1986

European J Oral Sciences

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– The absorbed doses in the body of a Rando‐Alderson phantom were measured in rotational panoramic radiography (OP‐5) with LiF‐700 crystals using conventional intensifying screens and standard collimator, as well as rare earth intensifying screens and a collimator slit of reduced width. The reduction of the absorbed doses obtained by using the latter combination was calculated. The reduction range in different regions was 0–50%. The greatest reduction was obtained in the cranial part of the phantom. In the caudal part little or no reduction was observed, probably because leakage radiation contributes substantially to the absorbed doses in this area. The average dose equivalent was calculated for organs in which measurements were made in several locations. The reduction was about 50% for these organs except for the gonads (8%). Compared to the estimated average annual dose equivalent originating from the natural background radiation sources, the dose equivalent resulting from this X‐ray examination was very small except in the thyroid gland. In this organ the dose equivalent from one exposure corresponded to 36 days of natural background radiation, but it could be reduced to 18 days by using rare earth intensifying screens in combination with reduced beam width.

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Section: Review^ Of Literaturementioning

confidence: 99%

Reduction of body doses in rotational panoramic radiography by means of reduced beam width in combination with rare earth intensifying screens

Aagaard

Sewerin

1986

European J Oral Sciences

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“…Application of these methods in dental radiography has been slower due to x-ray equipment limitations, such as a fixed milliamperage (mA) and an immovable aluminum filter placed by the manufacturer. However, the acceptability of commercially-available rare-earth intensifying screens and their use in both extra-oral and intra-oral radiography has been studied (Hurlburt, 1981;Keur, 1983;Fatouros et al, 1984;Gratt et al, 1984;Hurlburt, 1984;Tyndall and Washburn, 1986;Dawood and Manson-Hing, 1979;Kogon et al, 1984). The results of these trials showed that rare-earth screen/film combinations were clinically acceptable and could provide substantial reductions in radiation exposure.…”

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confidence: 93%

Effects of Rare-earth Filters on Patient Exposure and Image Contrast

1987

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Minimizing patient exposure while maintaining a diagnostically acceptable radiograph is a major goal in diagnostic radiography. Rare-earth filters may be the means to achieve this goal due to their "band-pass effect". The purpose of this study was to examine the image contrast effects and exposure reductions for various thicknesses of aluminum, samarium, gadolinium, gadolinium oxysulfide, and gadolinium oxysulfide added to 2.5 mm of aluminum. Trials were conducted on an intra-oral dental x-ray unit (range, 65 to 90 kVp). When compared with conventional aluminum, all of the rare-earth filters provided lower radiation exposures, with gadolinium in the metallic or oxysulfide form providing the lowest exposures. Samarium, at a thickness of 0.127 mm, yielded the highest image contrast. Gadolinium or gadolinium oxysulfide added to 2.5 mm of aluminum resulted in a slight loss of contrast when compared with conventional aluminum filtration. This loss may not be clinically significant, and when coupled with the reduced exposure afforded by these filters, they become viable as acceptable alternatives to aluminum filtration.

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A critical evaluation of xerocephalometry: Absorbed dose and diagnostic information

Kaugars

Fatouros

1984

Oral Surgery, Oral Medicine, Oral Pathology

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Faster screen/film combinations for cephalometric radiography

Cited by 19 publications

References 4 publications

Reduction of body doses in rotational panoramic radiography by means of reduced beam width in combination with rare earth intensifying screens

Reduction of body doses in rotational panoramic radiography by means of reduced beam width in combination with rare earth intensifying screens

Effects of Rare-earth Filters on Patient Exposure and Image Contrast

A critical evaluation of xerocephalometry: Absorbed dose and diagnostic information

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