Effects of filtration, collimation, and target-receptor distance on artificial approximal enamel lesion detection with the use of RadioVisioGraphy.
RadioVisioGraphy is an imaging modality that uses a charge-coupled device electronic sensor. Dental charge-coupled device imaging can be used to detect dental caries; however, it was not known what effect beam collimation, added filtration, or variable target-receptor distance has on this task. The purpose of this investigation was to study these effects were imaged by conventional radiography and RadioVisioGraphy varying exposure time, target-receptor distance, collimation, and filtration. Printed RadioVisioGraphy images without enhancement and E-speed radiographs were evaluated by five viewers. The number of true-positives and false-positives were compared as were sensitivity, specificity, positive and negative predictive values, accuracy, and entrance level radiation exposure. Added filtration reduced the false-positives regardless of collimation or target-receptor distance. True-positives and false-positives were greater at a target-receptor distance of 8 inch at exposures < 0.10 seconds (F < 0.0151). E-speed radiographs had a greater specificity and positive predictive value than RadioVisioGraphy images without image enhancement; however, no significant differences were found between RadioVisioGraphy images and E-speed radiographs in true-positive or false-positive identifications without image enhancement.
Department of Diagnostic Sciences, Indiana University School of Dentistry, Indianapolis.
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Parks
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Miles
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Van Dis
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Williamson
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Razmus
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Bricker
D000704:Analysis of Variance; D003731:Dental Caries / Q000000981:diagnostic imaging*; D005374:Filtration; D005682:Gadolinium; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008963:Molar; D017785:Photons; D011237:Predictive Value of Tests; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011861:Radiography, Dental / Q000295:instrumentation* / Q000379:methods; D012542:Scattering, Radiation; D012588:Scintillation Counting / Q000295:instrumentation; D012666:Semiconductors; D012680:Sensitivity and Specificity; D013679:Technology, Radiologic; D014741:Video Recording / Q000295:instrumentation
D005682:Gadolinium