Presentation and physical evaluation of RadioVisioGraphy

Mouyen, Francis; Benz, Christoph; Sonnabend, E; Lodter, Jean Philippe

doi:10.1016/0030-4220(89)90200-4

Cited by 188 publications

(53 citation statements)

References 5 publications

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“…This find ing is in contrast to those of other workers (Mouyen et al, 1989;H orneretal., 1990H orneretal., : Walker et al, 1991, who were in agreement that the dose of RVG was 40% of that for E speed film, but probably reflects the improvements made to the system which have been recently documented by Benz and Mouyen [1991], These improvements both in Average number of overlapped surfaces recorded averaged for three examiners: BWD 87 (12%); BWE 92 (13%); RVG 70 (10%); no change was found in the results after serially sectioning the teeth. the sensor and the system mean that different lower-dose film settings are now employed than was the case with earlier RVG systems.…”

Section: Resultscontrasting

confidence: 99%

“…The RVG system consists of a 70-kV x-ray generator, a computer-controlled timer and a display-processing system with high-resolution screen and printer. The intra-oral sensor houses a rare-earth intensi fying screen (25 x 16 mm) which is optically coupled to an array of charge-coupled devices [Mouyen et al, 1989], The analogue signal from the sensor is digitised by the display-processing unit to a depth of 8 bits (256 levels of grey) and displayed on a monitor screen (800 lines) [Benz and Mouyen, 1991].…”

Section: Radiovisiographymentioning

confidence: 99%

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Radiovisiographic Diagnosis of Dental Caries: Initial Comparison of Basic Mode Videoprints with Bitewing Radiography

Russell

Pitts²

1993

Caries Res

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Radiovisiography (RVG) is a commercially available, dental radiographic digital imaging system which is claimed to rival conventional techniques in terms of decreased radiation dose and the production of instantaneous images. The aim of this study was to compare in vitro the sensitivities and specificities derived from three examiners using conventional bitewing radiographic film (D and E speed) with those achieved by the same examiners using basic mode RVG bitewing videoprints of occlusal and approximal caries. Videoprints were used in this study, as they are the principal method of archiving radiovisiographic images, unless a separate compatible personal computer is used. The histological appearance of the subsequently sectioned teeth was used as the validating criterion. The in vitro results of basic mode RVG suggest that for occlusal caries, overall the sensitivity and specificity of RVG videoprints are similar to those of bitewing radiography. For approximal caries, the specificity of RVG videoprints was similar to that of bitewing radiography, but the sensitivity was slightly lower. Further work using the different modes available and electronically modified images is indicated.

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Section: Resultscontrasting

confidence: 99%

Section: Radiovisiographymentioning

confidence: 99%

Radiovisiographic Diagnosis of Dental Caries: Initial Comparison of Basic Mode Videoprints with Bitewing Radiography

Russell

Pitts²

1993

Caries Res

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“…Such a system [Benz and Mouyen, 1989;Mouyen et al, 1989] has been documented to perform as well as the dig itisation and contrast enhancement of conventional radio graphs [Wenzel et al, 1991b], and present results indicate that visual inspection, in combination with digital radiographic examination, may provide improved accuracy in occlusal caries diagnosis.…”

Section: Discussionmentioning

confidence: 58%

Validity of Diagnosis of Questionable Caries Lesions in Occlusal Surfaces of Extracted Third Molars

Wenzel

Fejerskov²

1992

Caries Res

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This study was to evaluate the accuracy of visual inspection, conventional radiography, and digital radiographic methods for the detection of occlusal carious lesions in third molars from a present-day adolescent population. Seventy-eight third molars, considered clinically to be without occlusal cavities, were extracted from young soldiers. Before extraction, an intra-oral radiograph was obtained. After extraction, the teeth were examined visually as per the criteria: 0 = no caries, 1 = chalky/stained fissure indicative of enamel caries, 2 = chalky and dark-stained fissure considered indicative of a dentinal lesion, and 3 = as per criterion 2, but with small surface defects (microcavities). The radiographs were digitised, and image enhancement with contrast stretch and a filtering procedure was performed, respectively. The three types of radiographic image were assessed as per the criteria: 1 = no caries/caries confined to enamel, 2 = caries involving the outermost dentine, and 3 = deep dentinal caries extending half-way or more to the pulp. Ground sections (500-600 μm in thickness) served as validation for lesion depth. The digital radiographic method with contrast stretch performed overall best of the four methods ( > 70% detection rate) while visual inspection (53% detection rate) performed better than conventional radiography (48% detection rate). When results from visual inspection and conventional radiography were combined, an increase in the detection rate of 11% was obtained with a 7% increase in false-positive scorings. When digitally contrast-manipulated radiographs were combined with visual inspection, a gain of 33% was obtained with an 11 % increase in false positives. The presence of microcavities was a good indicator of deep dentinal caries, whilst staining of fissures was of limited value.

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“…Simplified version of the PC has also been used to compare different imaging systems [12][13][14] or the effect of different viewing conditions [15]. This approach can be used to evaluate observer performance if the experimental conditions are exactly the same when the comparison is made.…”

Section: Psychophysical Property and Perceptibility Curve Testmentioning

confidence: 99%

Image quality assessment of digital intraoral radiography – perception to caries diagnosis

Yoshiura

2012

Japanese Dental Science Review

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Presentation and physical evaluation of RadioVisioGraphy

Cited by 188 publications

References 5 publications

Radiovisiographic Diagnosis of Dental Caries: Initial Comparison of Basic Mode Videoprints with Bitewing Radiography

Radiovisiographic Diagnosis of Dental Caries: Initial Comparison of Basic Mode Videoprints with Bitewing Radiography

Validity of Diagnosis of Questionable Caries Lesions in Occlusal Surfaces of Extracted Third Molars

Image quality assessment of digital intraoral radiography – perception to caries diagnosis

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