1 May 1994 Phosphor-covered junction CCD x-ray sensor for dental imaging
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Abstract
X-ray imaging devices for dental applications must have an image area of at least 3 X 4 cm2. MOS CCDs cover an area of about only 1.5 X 2.5 cm2, in this case the x-ray image should be reduced to these smaller dimensions. This can be realized by tapered optical fibers after the x-radiation has been converted into light. This procedure results in a rather bulky construction. Junction CCDs can be realized in the desired image area of 3 X 4 cm2, thus making the taper construction unnecessary. Experiments on a linear array Junction CCD covered with a phosphorescent layer have been carried out. These experiments show, that only 3.2 mR for one exposure is needed. This results in a very low radiation load for the patient. The radiation load for the sensor itself is very low too, which makes a high number of exposure possible during the lifetime of the device.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Antonius J.G. Spiekerman, J. C. Staalenburg, E. J. van Leeuwen, "Phosphor-covered junction CCD x-ray sensor for dental imaging", Proc. SPIE 2163, Medical Imaging 1994: Physics of Medical Imaging, (1 May 1994); doi: 10.1117/12.174274; https://doi.org/10.1117/12.174274
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