Dental x-ray diagnostics installation for producing panorama slice exposures of the jaw of a patient

US4878234A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Joachim Pfeiffer · Bensheim, DE
• Werner Guenther · Bensheim, DE
• Manfred Muether · Bensheim, DE
• Erich Heubeck · Bensheim, DE

Key dates

• Filing date: Jan 29, 1988
• Grant date: Oct 31, 1989
• Expiry date: Jan 29, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N23/30
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A dental x-ray diagnostics installation for producing panorama tomograms of the jaw of a patient has a radiation source and a detector, which converts x-radiation into corresponding light radiation, disposed on opposite sides of the patient. The detector is preceded by a secondary diaphragm. The radiation source, the detector and the secondary diaphragm are rotated around the patient so that radiation attenuated by the jaw, and passing through the secondary diaphragm is incident on the detector. At least one CCD sensor is provided on which light radiation generated by the detector is incident. The CCD sensor converts the light radiation into electrical signals. The sensor has an image zone with a number of lines parallel to a longitudinal extent of the opening of the secondary diaphragm, and has a storage zone. The lines in combination receive all of the light radiation so as to generate a complete charge image corresponding to the x-radiation incident on the detector. A clock generator is provided which controls transfer of the charge from the lines of the image zone into the storage zone, and also controls read-out of the storage zone. By selecting the frequency of the clock puls…