Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A calibration method for calibrating a measuring element for determining an electric current flowing through a basic-field magnet of a magnetic resonance imaging system includes performing a measurement with the measuring element, and performing a frequency measurement in the magnetic field of the basic-field magnet with a frequency measuring unit. The measurement of the measuring element and the frequency measurement are corresponding to the same magnetic field of the basic-field magnet. The calibration method also includes calculating a calibration factor based on a deviation between the measurement with the measuring element and the frequency measurement, and calibrating the measuring element or the electric current in the basic-field magnet based on the calibration factor.

Abstract: A method is provided for performing a quality analysis of a radio frequency (RF) coil of a magnetic resonance imaging device. In an operational mode, the RF coil is configured to acquire MR signals from an object to be observed. In a test mode: a test signal is emitted by a RF transmitter; the test signal from the RF transmitter is received directly by the RF coil, wherein the RF coil provides an output signal; and a performance indicator is provided by analyzing the output signal of the RF coil for performing the quality analysis.

Abstract: A calibration method for calibrating a measuring element for determining an electric current flowing through a basic-field magnet of a magnetic resonance imaging system includes performing a measurement with the measuring element, and performing a frequency measurement in the magnetic field of the basic-field magnet with a frequency measuring unit. The measurement of the measuring element and the frequency measurement are corresponding to the same magnetic field of the basic-field magnet. The calibration method also includes calculating a calibration factor based on a deviation between the measurement with the measuring element and the frequency measurement, and calibrating the measuring element or the electric current in the basic-field magnet based on the calibration factor.

Abstract: A method of operating a magnetic resonance imaging (MRI) apparatus includes exciting a body coil of the MRI apparatus to emit a radio-frequency signal, determining a center frequency of a resonance curve of the body coil, and calculating a magnet target frequency based on the determined center frequency. A magnet is ramped to the magnet target frequency.

Abstract: A method is provided for performing a quality analysis of a radio frequency (RF) coil of a magnetic resonance imaging device. In an operational mode, the RF coil is configured to acquire MR signals from an object to be observed. In a test mode: a test signal is emitted by a RF transmitter; the test signal from the RF transmitter is received directly by the RF coil, wherein the RF coil provides an output signal; and a performance indicator is provided by analyzing the output signal of the RF coil for performing the quality analysis.

Abstract: In a method for automatically supporting an operator in working through an execution sequence protocol with a number of sequence steps, with which a person under examination is being examined in a medical imaging facility, the execution sequence protocol to be carried out for the person under examination is determined, and image data are acquired that show a field of vision of at least a part of the environment of the medical imaging facility and the person under examination, as seen by the operator. A next sequence step of the execution sequence protocol is determined that is to be carried out by the operator. Visual information is created that will inform the operator about the operating step to be carried out, and the visual information is project at a viewing facility for displaying an augmented reality to the operator, in which the field of vision is presented augmented by the visual information.

Abstract: An apparatus for maintenance support of a medical technology device. The apparatus comprises a detection facility, a controller, an access facility and an output facility. The detection facility is configured for detecting a relative position of the apparatus in respect of the medical technology device. The access facility is configured to store maintenance information on a storage device. The output facility is configured for outputting information. The controller is configured to output maintenance information as a function of the relative position of the output facility in respect of the medical technology device by way of the output facility.

Abstract: In a method for automatically supporting an operator in working through an execution sequence protocol with a number of sequence steps, with which a person under examination is being examined in a medical imaging facility, the execution sequence protocol to be carried out for the person under examination is determined, and image data are acquired that show a field of vision of at least a part of the environment of the medical imaging facility and the person under examination, as seen by the operator. A next sequence step of the execution sequence protocol is determined that is to be carried out by the operator. Visual information is created that will inform the operator about the operating step to be carried out, and the visual information is project at a viewing facility for displaying an augmented reality to the operator, in which the field of vision is presented augmented by the visual information.

Abstract: A magnetic resonance system has a first installation unit, in which a control processor device is arranged, as well as a radio-frequency coil arrangement for transmitting and receiving magnetic resonance signals. The radio-frequency coil arrangement is controlled or read out by a transmit device, having a digital transmit unit built into the first installation unit for emitting a digital transmit signal to an analog transmit unit, which outputs an analog transmit signal based on the digital transmit signal, and by a receiving apparatus, having at least one analog reception unit for converting an analog received signal into a digital reception signal and at least one digital reception unit for digital demodulation of the received signal. The digital reception unit is built into a further installation unit external to the first installation unit.

Abstract: A magnetic resonance system has a first installation unit, in which a control processor device is arranged, as well as a radio-frequency coil arrangement for transmitting and receiving magnetic resonance signals. The radio-frequency coil arrangement is controlled or read out by a transmit device, having a digital transmit unit built into the first installation unit for emitting a digital transmit signal to an analog transmit unit, which outputs an analog transmit signal based on the digital transmit signal, and by a receiving apparatus, having at least one analog reception unit for converting an analog received signal into a digital reception signal and at least one digital reception unit for digital demodulation of the received signal. The digital reception unit is built into a further installation unit external to the first installation unit.

Abstract: A local antenna for an MR device contains or carries a marking arrangement that permanently contains a substance that can be detected using MR techniques. The marking arrangement allows the substance to selectively be made visible or not visible in an MR image.

Abstract: In a method for determining the position of at least one local antenna in an examination chamber of a magnetic resonance apparatus, magnetic resonance signals emitted by a body arranged in the examination chamber are received, locus-encoded in at least one coordinate direction, by an antenna that has a homogeneous sensitivity distribution. From the received magnetic resonance signals, image data that are locus-resolved in the at least one coordinate direction are produced in the form of first intensity values. Magnetic resonance signals emitted by the body are received, locus-encoded in the coordinate direction, by the at least one local antenna. From the received magnetic resonance signals, image data that are locus-resolved in the at least one coordinate direction are produced in the form of second intensity values.

Abstract: A switch matrix has a set of inputs, a set of outputs, controllable switch elements and a conductor arrangement that is connected to the inputs and outputs and to the controllable switch elements. The controllable switch elements together with the conductor arrangement produce switched electrical connection paths between at least two inputs and an output. The electrical connection paths contain connecting branches that, proceeding from the at least two inputs and the output, meet at a junction point. The connecting branches connected to the at least two inputs have identical electrical lengths up to the junction point.

Abstract: In a local antenna arrangement for a magnetic resonance apparatus, an antenna structure is connected to a signal generator via an inhibiting circuit. The signal generator is fashioned to generate and emit a detection signal from the radio-frequency signal received from the antenna structure when the local antenna is not connected. The inhibiting circuit is fashioned to electrically decouple the signal generator from the antenna structure when the local antenna is connected.

Abstract: An antenna for a magnetic resonance apparatus has an antenna conductor that can be adapted to examination regions of different sizes, with one region of the antenna conductor divided into conductor sections. The conductor sections are connected to one another via capacitive elements, with the conductor sections and the capacitive elements connected alternating in series. The conductor sections are connectable to the remaining antenna conductor via releasable electrical connections.

Abstract: A double surface coil for a nuclear magnetic resonance apparatus has two individual coils which are connectable to a transmission/reception circuit via a matching network. The coils are connected together at a junction. Each coil has a controllable switch connected between the junction and the matching circuit. The individual surface coils can thus be controlled with a low number of controlled elements in any desired operating mode.