Siemens Aktiengesellschaft

Leonhard Werner

Erich Heubeck

Werner Guenther

Manfred Muether

Werner Gunther

Michael Doebert

Dieter Molitor

Manfred Muther

A dental x-ray diagnostics installation for producing panorama x-ray exposures of the skull of a patient has a rotary unit and a positioning unit mounted so as to be pivotable boom-like around a horizontal axle shaft and are arranged so as to be fixable in individual swiveled positions. The individual swiveled positions thereby correspond to different physical sizes of a seated patient. For preparing an exposure, the positioning unit is first adjusted to the patient and the rotary unit is subsequently adjusted in a fixed allocation to the positioning unit.

Dental x-ray diagnostic installation for producing panorama x-ray

A dental x-ray diagnostics installation has a rotary unit carrying an x-ray source and a radiation detector disposed behind a secondary diaphragm, the rotary unit rotating around the jaw of a patient to produce panorama tomograph exposures of the patient's jaw. The radiation detector generates electrical signals proportional to the incident radiation intensity. To simplify signal processing, the detector is formed of one or more semiconductor detectors having a scintillation layer which corresponds to the size of the opening in the secondary diaphragm. The voltages acquired by the detector are converted to digital form, and stored in an image memory. A computer calculates a total image from the signals supplied by the detector, and stored in the memory, during a complete exposure. The signals from the image memory are combined to generate a tomogram of a desired slice of the patient's jaw.

Dental x-ray diagnostics installation for producing panorama slice

A dental diagnostic apparatus or installation which obtains a better matching of the exposure data to the patient and has a rotary unit carrying the radiation source and the film cassette which are adjustable to an initial position by an adjustment arrangement and from this initial position the film cassette can be charged with the radiation within the framework of normal transillumination with the radiation initially beginning outside of the mandibular arch. The incoming radiation dose is measured by a detector arrangement which creates a signal that is compared in a computational unit of a control arrangement to a rated quantity corresponding to a prescribed dose value. The exposure data required from further transillumination of the patient's head are identified therefrom and the tomogram position is determined by identifying the patient-associated film speed via the jaw length/jaw width measurements and comparison to defined rated value.

Dental x-ray diagnostic apparatus for producing panorama tomograms of

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Hemsbach, Germany

Leonhard Werner