Abstract:
The embodiments relate to a method and a receiving system for an imaging magnetic resonance tomography system. The receiving system includes at least one multiplexer entity for a plurality of receive signals, which respectively come from an antenna of a local coil and may be switched to an analog-digital converter, wherein sampling rates (e.g., 20 MS/s per Ch, 40 MS/s per Ch, 80 MS/s per Ch) of an analog-digital converter for the sampling of a receive signal may be changed.
Abstract:
A local coil device for a head of a patient for use in a magnetic resonance device includes a local coil with at least one local coil element and a receiver for the head of the patient in which the head may be received in a desired pose. The local coil device also includes a shim coil device with at least one shim coil element for compensating basic field inhomogeneities in a region of interest of the prefrontal cortex of the patient. With respect to the desired pose, the shim coil element of the shim coil device integrated in the local coil or received in a receiver for the shim coil device is arranged anterior to the head.
Abstract:
A shoulder coil for a magnetic resonance imaging device includes a bottom part and one or more top part elements that may be moved relative to the bottom part. The one or more top elements each have at least one coil therein.
Abstract:
A transmission apparatus for transmitting an intermediate frequency signal and an oscillator signal for mixing down the intermediate frequency signal, a magnetic resonance tomograph with a local coil, a receive unit, and a transmission apparatus are provided. The transmission apparatus has a symmetrical transmission line for transmission of the oscillator signal and the intermediate frequency signal and a symmetrizing element for adaptation of an unsymmetrical signal source and/or signal sink to the symmetrical transmission line. The symmetrizing element has only ferrite-free inductances. The local coil and the receive unit are connected for signaling purposes via the transmission apparatus.
Abstract:
A method for the control of a magnetic resonance system is provided. In a test phase before a magnetic resonance measurement, a test high-frequency pulse with several parallel individual high-frequency pulses is transmitted with a transmitter antenna arrangement over various different high-frequency transmitter channels. At lower transmitter power, the test high-frequency pulse generates essentially the same field distribution as an excitation high-frequency pulse to be transmitted during a subsequent magnetic resonance measurement. A high-frequency field generated by this test high-frequency pulse is measured in at least one area of a local pulse arrangement, and on the basis of the high-frequency field measured, a high-frequency field value that is to be anticipated at the local coil arrangement during the subsequent magnetic resonance measurement is determined. The control of the magnetic resonance system during a later magnetic resonance measurement includes taking the high-frequency field value into account.
Abstract:
A shim cushion for a magnetic resonance tomography system includes at least two layers. A first layer of the at least two layers includes both a higher deformability and also a lower susceptibility than a second layer of the at least two layers.
Abstract:
An MR device includes at least one body coil for generating a B1 magnetic field and at least one radiofrequency line routed through the B1 magnetic field. The at least one radiofrequency line has at least one frequency filter for blocking a voltage induced by the B1 magnetic field. At least one section of the radiofrequency line routed through the B1 magnetic field is embodied in printed circuit board technology on at least one printed circuit board, and information-carrying signals may be transmitted over the at least one radiofrequency line on a different frequency than the frequency of the voltage induced by the B1 magnetic field.
Abstract:
A shim coil arrangement for at least one extremity of a patient such as a forearm and/or a hand for use in a magnetic resonance device is provided. The shim coil arrangement is arranged surrounding a receptacle for the at least one extremity. At least two planar shim coils having a common coil plane that lies at right angles to a direction of a basic magnetic field of the magnetic resonance device in a usage state and/or to a longitudinal direction of the receptacle are arranged around a circumference of the receptacle. A plurality of coil planes succeeding one another in the direction of the basic magnetic field of the magnetic resonance device in the usage state and/or the longitudinal direction of the receptacle and at right angles to the direction of the basic magnetic field and/or the longitudinal direction are provided with at least two planar shim coils.
Abstract:
A sheath current for an imaging magnetic resonance tomography system is provided, wherein a coil element of the sheath current filter is embodied to surround a waveguide of the sheath current filter, a local coil connection, and a local coil.
Abstract:
A method for operating a magnetic resonance facility is proposed. The magnetic resonance facility has a number of power-consuming components. The power consumption is determined for each component. Operation of the components is controlled based on at least one criterion so that a predetermined threshold value for the overall power consumption of the magnetic resonance facility is not exceeded.