Siemens Aktiengesellschaft

Heinz Baumann

Manfred Rattner

Thomas Engel

Werner Kuehnel

Peter Nögel

Hans-Jurgen Gerlach

Gerhard Friedrich

Martin Hecht

A positioning device for an X-ray detector or an X-ray source is provided. The positioning device includes an arched arm, inside of which the X-ray detector or the X-ray source can be mounted in a manner that enables the detector or source to be displaced in the direction of the arch. The positioning device includes a base, inside of which the arched arm is mounted in a manner that enables the arched arm to be displaced in the direction of the arch. Either the X-ray detector is mounted in the positioning device and the X-ray source is placed separately therefrom or, conversely, the X-ray source is mounted in the positioning device and the X-ray detector is placed separately there from.

Positioning device for an X-ray detector

An exemplary embodiment comprises a patient support, an x-ray tube supplied by an x-ray generator, an x-ray image intensifier with a series connected television chain, a control loop for the controlling the mean image brightness, a syringe for contrast medium injection, and a program memory for storing several radiographic exposure programs. A time measuring device is present which is started by the syringe and is stopped by an evaluation unit when the mean image brightness varies to a predetermined extent. A computer calculates the contrast medium velocity from the measured time and the distance (x) between the injection location and the measuring location. On the basis of the calculated contrast medium velocity, an optimum program calculation, or program selection, respectively, is possible.

X-ray diagnostic system for angiographic radiographs

A resonant circuit inverter has an LC series resonant circuit and a switching device for connecting the resonant circuit with periodically alternating polarity to a dc voltage source, the switching device feeding a high voltage transformer. The resonant circuit inverter further includes an interstage transformer having a primary winding serving as the inductance in the LC resonant circuit and having a secondary winding connected to the primary winding of the high voltage transformer, the high voltage transformer having a secondary winding at which the load voltage is tapped.

Resonant circuit inverter

An X-ray diagnostic generator has a high voltage means to supply energy to an x-ray tube and a high voltage regulating means housed in a common oil-filled tank.

X-Ray diagnostic generator

In the illustrative embodiment, an X-ray tube is attached to a rotary mounting, and the structural elements of the X-ray generator on the high voltage side are disposed on the rotary mounting in an oil-filled tank; for the transfer of energy, a rotating current coupling is provided between the rotary mounting and a stationary energy supply installation, e.g. a mains rectifier. The anode of the X-ray tube is connected to ground potential.

Tomograph for producing transverse layer images

In an exemplary arrangement a rotatable scanning system comprises an X-ray tube which emits a beam of X-rays which penetrates the layer to be examined, and a radiation receiver which supplies electrical output signals corresponding to the measured radiation intensity. A computer is connected to the radiation receiver for calculating the attenuation values of specific image points of the irradiated body layer from the output signals of the radiation receiver. An inductive transformer is provided for transmitting energy to the X-ray tube, its secondary winding being arranged in a fixed position relative to the X-ray tube and rotating with the scanning system and its primary winding being fixed relative to the stationary part of the unit.

Tomographic X-ray diagnostic unit with the secondary of the high voltage

For the formation of an electric signal corresponding to the x-ray tube voltage, the high voltage transformer is provided with a low voltage winding. The low voltage at the terminals of the low voltage winding is conducted to the exterior of the tank. Here, a low voltage rectifier circuit is connected which corresponds in its circuit configuration to the high voltage rectifier circuit so that the electric signal supplied by the low voltage rectifier circuit accurately corresponds to the x-ray tube voltage and can be used for control purposes. The high voltage rectifier circuit and the low voltage rectifier circuit can operate as voltage multipliers.

X-ray diagnostic generator comprising an oil-filled tank with a high

In an illustrative embodiment, a medium frequency generator is utilized, and at least the components on the high-voltage side of the X-ray generator and the medium frequency generator are mounted on the rotating frame, and a stationary energy supply installation, for example, a mains rectifier, for the purpose of energy transmission.

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Uttenreuth, Germany

Heinz Baumann