Siemens Aktiengesellschaft

Siemens Aktiengellschaft

Helmut Reichenberger

Georg Naser

Siegfried Schneider

Dietrich Hassler

Erhard Schmidt

Hubert Schwark

Arnulf Oppelt

Eckhardt Hoenig

Heinz Kresse

Axel Wirth

Helmut Jahn

Klaus Abraham-Fuchs

Bernd Granz

Manfred Pfeiler

Anders Lekholm

Dieter Hassler

Volker Schmidt

Thomas Birkhoelzer

Rudolf Schittenhelm

Franz Grasser

Karlheinz Pauli

Georg Koehler

Erich Noske

Gerhard Brandner

Alexander Herold

Eckart Stetter

Guenter Temme

Henrich Seifert

Wilfried Schajor

Karl-Heinz Schlee

In an autonomous emergency monitoring system, wherein the user need not carry any signaling devices whatsoever, an emergency situation can be reported to an external receiver by voice input via microphones via a communication interface. Further, a monitoring of the person can ensue via sensor systems that can likewise setup an external connection via the communication interface.

Home emergency warning system

Therapy apparatus for treating conditions of the heart and

In therapy apparatus for the treatment of tissue in the body of a life form, at least one therapeutic ultrasound transducer emits ultrasound having an effective therapeutic region is provided. The ultrasound intensity in the region of the tissue to be treated is measured. Displacement of the effective therapeutic region and the body of the life form relative to one another ensues on the basis of the measured ultrasound intensity such that at least a part of the tissue to be treated is located in the effective therapeutic region.

Method and apparatus for ultrasound tissue therapy

In a method and apparatus for identifying the spatial distribution of electrical impedance within an examination subject, a source of electrical current is electrically connected to at least two feed electrodes which impress a feed current from the source in an examination region of a subject. The resulting magnetic field is measured at points outside the examination region, and an equivalent current density distribution is reconstructed within the examination region from the measured values of the magnetic field by an evaluation unit. A compensation conductor is connected to the current source. The current source delivers a compensation current, which flows in a direction opposite to the feed current, through the compensation conductor loop, so that the magnetic field generated by the feed current in the connecting lines is compensated. The evaluation unit identifies the spatial distribution of the impedance from the equivalent current density distribution. The spatial distribution of the impedance can be portrayed on a display.

Method and apparatus for non-invasive identification of the

A method and apparatus for non-destructively or non-invasively measuring a temperature change in the inside of a subject, in particular a living subject, identify the temperature change in a region of interest during the course of producing ultrasound images of the region by determining the change of the acoustic impedance of the region of interest, and allocating a temperature change to the impedance change. An installation for treating a living subject with heating radiation which employs the above method and apparatus for measuring the temperature change of a region of treatment, is also disclosed.

Method and apparatus for non-invasive measurement of a temperature

An apparatus for generating acoustic rarefaction pulses, i.e., a negative pressure pulse, has a pressure pulse source and reflector having a negative reflection factor, and an acoustic propagation medium filling the space between the pressure pulse source and the reflector. The reflector has a boundary surface facing toward the pressure pulse source, consisting of a medium which is acoustically soft in comparison to the acoustic propagation medium. The boundary surface medium is separated from the acoustic propagation medium by a wall which is impenetrable by the acoustic propagation medium.

Apparatus for generating acoustic rarefaction pulses

An apparatus for measuring weak, location-dependent and time-dependent magnetic fields emitted from a source situated in an examination subject includes a sensor arrangement having at least ten gradiometers of the first order, each gradiometer being inductively coupled to a DC-SQUID. The sensor arrangement and the examination subject are disposed in a room which shields the examination subject and the sensor arrangement from magnetic fields. The room has a shielding factor of at least 10 for magnetic alternating fields having a frequency of 0.5 Hz, the shielding factor increasing with increasing frequency. A method for operating the apparatus is also disclosed.

Apparatus for measuring weak, location-dependent and time-dependent

Apparatus and method for measuring weak, location-dependent and

An x-ray radiator has an elongated cathode for emitting an electron beam having an elongated cross section, the electrons of the electron beam being accelerated onto an anode for generating x-radiation. The cathode is formed by a geometrical member completely filled with electron-emitting material, and the material of the cathode contains at least one element from the group of rare earths and at least one element from the group of precious metals or boron.

X-ray arrangement comprising an X-ray radiator having an elongated

An apparatus for generating focused shockwaves, suitable for extracorporeal lithotripsy, has a substantially hollow-cylindrical membrane consisting of electrically conductive material and an electrical coil arrangement disposed inside the membrane which can be supplied with a high voltage pulse to rapidly repel the membrane and thereby generate a shockwave. The apparatus includes a concave reflector in the form of a paraboloid of revolution, which surrounds the membrane and coil, and which has a center axis substantially coincident with the center axis of the membrane. An acoustic propagation medium fills at least the volume between the membrane and the reflector. The shockwave generated by the cylindrical coil and membrane arrangement is reflected and focused by the paraboloid of revolution so that the shockwaves converge at a focus. The apparatus is arranged so that the focus conicides with a region of a patient to be treated with shockwave therapy, such as a calculus. The coil is wound in the shape of a cylindrical helix, and the membrane is in the form of a thin-walled, smooth tube.

Apparatus for generating focused shockwaves having a cylindrical coil

An extracorporeal lithotripsy apparatus includes a shock waves source which generates shock wave along an acoustic axis in a propagation direction, with the shock waves being caused to converge, either by a curvature of the shock wave source or by the use of a separate focusing element, at a focus region, the lithotripsy apparatus being initially positioned so that a calculus to be disintegrated is coincident with the focus region. During treatment, the calculus may be displaced from its original, identified position by patient movement, such as due to respiration. In addition to permitting adjustment of the position of the focus region along the longitudinal axis of the shock wave source, adjustable shock wave deflection elements are provided which are pentrated by the shock waves and which interact with the shock waves to deflect the shock waves and thereby cause the acoustic axis to deviate from the longitudinal axis, for permitting selected lateral adjustment of the positon of the focus region to accommodate lateral displacement of the calculus and maintain coincidence of the focus region and the calculus.

Extracorporeal lithotripsy apparatus with transversely adjustable focus

An apparatus for extracorporeal lithotripsy has one or more shock wave sources for generating shock waves converging at a focus zone in which a calculus to be disintegrated is located in a patient, and additionally has a therapeutic ultrasound source for generating ultrasound waves focused at a focus zone substantially coinciding with the focus zone of the shock wave source. The ultrasound waves generated by the therapeutic ultrasound source have a sufficiently high energy to be effective for assiting in disintegrating the calculus, as contrasted with ultrasound waves used to obtain an ultrasound image. The shock wave source and the therapeutic ultrasound source can be driven from a generator stage connected both sources, which is capable of driving the sources simultaneously or in selected chronological succession, such as in alternation.

Apparatus for extracorporeal lithotripsy using shock waves and

A coupling member for transmission of shock waves from a shock wave device to a patient to be treated is composed of an elastic, shape-stable material having a moist outside surface, and is preferably formed of a hydro-gel, such as a polyacrylamide gel. The material is provided with an insert which contributes to its good stability and also enables manipulation of the member. The coupling member can also include, with or without the insert, a shock wave sensor which is embedded in the material and enables checking the power and the position or center of the shock wave source relative to a predetermined point.

Coupling member for a shock wave therapy device

A shock wave generator has a focusing stage wherein a number of different lenses having respectively different concentrating characteristics are accommodated, and which can be selectively introduced transversely into the path of the shock wave pulse, by linear displacement or by pivoting. The lenses can be alternatively introduced one at a time in one embodiment, or in a second embodiment more than one lens can be simultaneously introduced to achieve a concentrating characteristic resulting from a combination of lenses. For further adjustment and flexibility, the shock wave generator is provided with at least two capacitors for selectively varying the amount of discharge energy used to trigger the shock wave. The approach path between the membrane which generates the shock wave and the lens can also be varied. By combining variations in the discharge energy, the length of the approach path, and the type of lens, a wide range of operating conditions are available so that operation of the shock wave generator can be adapted from patient to patient in accord with the best suited treatment.

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Eckental, Germany

Helmut Reichenberger