Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-03-20
1983-10-11
Ng, Jin F.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
378 99, 378 38, 378 40, H04N 718, H04N 532
Patent
active
044096160
ABSTRACT:
A digital dental system and method for real time display of a patient's dental image to detect changes with respect to at least one previous dental image of the patient. The system comprises an imaging unit for obtaining a real time dental image from the patient, a converter for converting the real time dental image to digital form, an input device for inputting further digital signals corresponding to at least one previous dental image of the patient, a processor for processing the digital signals and the further digital signals to develop corresponding display signals and further display signals, and a display unit and at least one further display unit for simultaneously and in real time displaying the dental image and the at least one previous dental image, respectively, of the patient. A preferred embodiment of the invention involves whole picture processing of the present and previous dental images to determine changes or differences therebetween. Further features of the present invention include the provision of an alignment motion controller for aligning an image intensifier and an X-ray tube (forming the imaging unit), as well as the provision of a capability for selective display, on one of the display units, of either the current X-ray image or a previously obtained (and stored) X-ray image.
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Frost et al., "A Digital Video Acquisition System for Extraction of Subvisual Information in Diagnostic Medical Imaging," SPIE vol. 127, Optical Instrumentation in Medicine 9/77.
Coles Edward L.
Georgetown University
Ng Jin F.
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