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International Journal of Computerized Dentistry

Year 1999
Volume 2 , Issue 3

Pages: 183 - 196

RVG-ui: A Sensor to Rival Direct-Exposure Intra-Oral X-Ray Film

A G Farman/T T Farman

The RVG-ui is a solid-state system for dental x-ray imaging cominging a charge-coupled device (CCD) of small pixel size (19.5 um) with a caesium iodide (Csl) scintillator. It features two sizes of sensor with receptive areas that approach the size of No. 1 and No. 2 periapical x-ray films. The spatial resolution of the RVG-ui exceeds 20 lp/mm, rivaling direct-exposure intra-oral x-ray film when the latter is optimally exposed and processed. The recording latitutde of the RVG-ui for clinically acceptable images in 25:1, making exposure error unlikely. In features such as speed of image acquisition, reduction in radiation dose, retrieval of data, and organization and storage of images, the RVG-ui system surpasses traditional x-ray film. Furthermore, it is possible to make accurate length measurements very quickly, and to apply an artificial intelligence determine the probability of proximal dental caries in enamel and dentin.


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