Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Siemens Healthineers Ag

Razvan Lazar

Jürgen Nistler

Wolfgang Renz

Ludwig Eberler

Martin Schramm

Thorsten Feiweier

Volker Matschl

Lothar Schön

Norbert Rietsch

Markus Vester

Juergen Nistler

Jürgen Huber

Wilhelm Horger

Yvonne Candidus

Melanie Schmitt

Stephan Biber

Thorsten Speckner

Rainer Schneider

Ralph Kimmlingen

Andreas Krug

Axel Vom Endt

Eva Eberlein

Alexander Granzer

Günther Zebelein

Paul Yoe

A magnetic resonance tomography system with a sensor for detecting spikes and with a gradient coil. Nuclear spins of an object under observation are excited by a magnetic alternating field of the magnetic resonance tomography system. A gradient field is generated by the magnetic resonance tomography system using the gradient coil. A magnetic resonance signal is acquired using a receiving antenna of the magnetic resonance tomography system and an interference signal using the sensor. From the magnetic resonance signal an image is reconstructed as a function of the acquired interference signal of the sensor.

Sensor for detecting gradient-bounded interference to a magnetic resonance tomography system and method for operation

A magnetic resonance coil having at least one tuning device for tuning the magnetic resonance coil, a magnetic resonance device, and a method for tuning a magnetic resonance coil are provided. The at least one tuning device includes a plurality of capacitors that are mechanically interlinked.

Tunable magnetic resonance coil

The disclosure relates to a compensation capacitor for an antenna of a magnetic resonance scanner and a corresponding antenna with a compensation capacitor. The compensation capacitor has a first electrode and a second electrode arranged in parallel. An insulation material configured to resist high voltages and a dielectric with low dielectric losses are arranged between the first and the second electrode. The second electrode and/or the dielectric may be moved relative to the first electrode such that a surface area of a projection of the surface of the first electrode along the surface normal of the first electrode to the surface of the second electrode and/or the dielectric is variable.

Flat adjustable capacitor for magnetic resonance scanner

A method for adjusting a field distribution of an antenna arrangement of a magnetic resonance system is provided. The symmetry of the field distribution may be impaired by positional inaccuracy of the antenna arrangement in the magnetic resonance system. The antenna arrangement comprises oscillating circuit antenna elements and switching elements. Each of the oscillating circuit antenna elements is assigned a respective switching element of the switching elements. A respective switching element is configured to couple the assigned oscillating circuit antenna element operatively to the antenna arrangement in dependence on a status of the respective switching element. During the method, symmetry information on the field distribution in the antenna arrangement is measured, and the switching elements are automatically adjusted using the measured symmetry information, such that the symmetry of the field distribution in the interior of the antenna arrangement is increased.

Adjusting a field distribution of an antenna arrangement of a magnetic resonance system

A method for signaling a tuning of an adjustment parameter of an antenna coil arrangement of a magnetic resonance tomograph includes detecting a deviation between an actual adjustment value of at least one adjustment parameter and a required adjustment value of the at least one adjustment parameter. As a function of the deviation, an acoustic and/or a mechanical signal is output in real time to an operator. A device for signaling a tuning of an adjustment parameter of a coil arrangement of a magnetic resonance tomograph, and a magnetic resonance tomograph operating according to the method and/or containing the device are described.

Signaling a tuning of adjustment parameters of a coil arrangement

The embodiments relate to a magnetic resonance scanner including an antenna system having an adjustment device for modifying the natural frequency of a natural mechanical oscillation mode of the antenna system. According to the embodiments, in a method for operating a magnetic resonance imaging system having a magnetic resonance scanner comprising an antenna system, a natural frequency of a natural mechanical oscillation mode of the antenna system is controlled and/or regulated.

Magnetic resonance scanner and antenna

A device for thermal stabilization of a first electrical characteristic of an antenna array of a magnetic resonance tomograph includes a heat exchanger configured for thermal coupling of a component of the device to a heat source. The device also includes a temperature-dependent second electrical characteristic. In a predefined connection to the antenna array, the temperature-dependent second electrical characteristic is configured to compensate for an effect of a temperature-dependent change on the first electrical characteristic of the antenna array in a predetermined temperature range.

Thermostabilization of antenna array for magnetic resonance tomography

A magnetic resonance scanner includes an antenna system, such as a body coil, mechanically coupled to a support structure, such as a gradient coil, via a suspension system. The suspension system has a setting mechanism in order to reversibly set a coupling parameter value of the mechanical coupling between the antenna system and the support structure and/or a position or location of the antenna system relative to the support structure. The coupling parameter may be set during operation of a magnetic resonance imaging system including the magnetic resonance scanner.

Magnetic resonance scanner with antenna system

The embodiments relate to a magnetic resonance coil for a magnetic resonance device with a measuring chamber for an examination object and a cylindrical birdcage antenna arrangement having a plurality of antenna elements disposed at least in some areas around a measuring chamber in the form of circumferential antenna rings or axial outer rods connecting the rings. The antenna elements include electric components, e.g., reactive capacitive and/or inductive systems. The magnetic resonance coil also has at least two antenna feeds, e.g., phase-offset in relation to one another by 90&#xb0;, by which radio-frequency energy is able to be supplied to the birdcage antenna arrangement. The antenna feeds include at least one symmetrical feed via at least one of the electric components of the birdcage antenna arrangement as well is at least one assigned asymmetrical feed between the birdcage antenna arrangement and a screen connection.

Magnetic resonance coil, device and system

A mounting device for a body coil of a magnetic resonance device is provided. The mounting device includes a suspension device that has at least one suspension element. The at least one suspension element is mechanically connectable to a counterpart piece of the body coil. The suspension device is configured for suspension and coarse adjustment of the body coil in the magnetic resonance device during an adjustment process of the body coil. The mounting device also includes an adjustment device that has an adjuster for changing a position of the body coil, and adjustment indicators for displaying the position of the body coil. The adjustment device is provided for fine adjustment of the body coil during the adjustment process. The mounting device includes an attachment device differing from the suspension device. The attachment device includes at least one attachment element for mechanical interaction with the body coil.

Mounting for a body coil of a magnetic resonance device

Mounting for a body coil of a magnetic resonance device is provided. A reversible and universal mounting device for a body coil in the magnetic resonance device is provided. The mounting device includes at least one expanding ring for creating a way of retaining the body coil in a tunnel-shaped magnetic opening of the magnetic resonance device. The mounting device also includes at least one expander that is configured to enable the expanding ring to be mounted on the inside of the tunnel-shaped magnetic opening of the magnetic resonance device by spreading. The mounting device includes at least one mounting element for mechanically supporting the body coil on the expanding ring.

A patient support apparatus for a medical imaging apparatus, such as a magnetic resonance apparatus, is proposed. The patient support apparatus has a couch, a lifting unit for vertical movement of the couch, a travel unit, and at least one sensor unit to detect at least one weight variable for determining the weight of a patient. The at least one sensor unit has at least one sensor element, which is disposed on the lifting unit and/or on the travel unit.

Patient support apparatus for a medical imaging apparatus and a medical imaging apparatus having the patient support apparatus

A magnetic resonance antenna arrangement having a plurality of antenna elements disposed around a measurement chamber and a plurality of switching elements is provided. The antenna elements and the switching elements are disposed and interconnected such that in a first switching configuration of the switching elements, the antenna elements form a first antenna architecture, and in a second switching configuration of the switching elements, the antenna elements form a second antenna architecture.

Magnetic resonance antenna arrangement and method for acquiring magnetic resonance signals using the magnetic resonance antenna arrangement

The present embodiments include a magnetic resonance antenna having parallel-running longitudinal antenna rods arranged in a birdcage structure and antenna ferrules connecting the parallel-running longitudinal antenna rods at ends of the parallel-running longitudinal antenna rods in radio frequency terms. The magnetic resonance antenna includes a plurality of radio-frequency switching elements configured to interrupt at least a part of the parallel-running longitudinal antenna rods to detune a natural resonance frequency with respect to an operating magnetic resonance frequency in radio frequency terms. At least some radio-frequency switching elements of the plurality of radio-frequency switching elements are arranged at end sections of the parallel-running longitudinal antenna rods.

Magnetic resonance antenna and a magnetic resonance device having a magnetic resonance antenna

Efficient mounting of a module to a whole-body coil of a magnetic resonance apparatus is enabled by a circuit board with conductive contact regions located at least in the area of an edge of the circuit board, with which contact regions contacts of an electronic module for a magnetic resonance apparatus are connected in a conductive manner. The contact regions of the circuit board are configured for electrical contact with the whole-body coil.

MRI body coil connected to a frangible retention frame circuit board assembly and method for attaching an electronic module to a body coil of a magnetic resonance apparatus

Growing community of inventors

Erlangen, Germany

Razvan Lazar