Disclosed is a magnetic resonance imaging apparatus and a magnetic resonance imaging method using same, the magnetic resonance imaging apparatus comprising: a pair of end coils disposed at the top and bottom ends, respectively, having a ring shape, and having a shape in which several spaces cut out of a circumferential shape are connected by switching module; a plurality of leg coils connecting the pair of end coils; and the switching module respectively disposed between the pair of end coils and the plurality of leg coils, wherein the switching module include a high frequency transmission/reception coil opened by a first frequency and shorted by a second frequency different from the first frequency.

A method for performing a magnetic resonance measurement includes selecting a first set of coil elements from a plurality of coil elements and a second set of coil elements from the plurality of coil elements, and performing a magnetic resonance measurement. During the magnetic resonance measurement with the first set of coil elements and the second set of coil elements, magnetic resonance signals and pilot tone signals are received. The method includes ascertaining at least one magnetic resonance image solely with the assistance of magnetic resonance signals received with the first set of coil elements during performance of the magnetic resonance measurement, and ascertaining patient movement information solely with the assistance of pilot tone signals received with the second set of coil elements during performance of the magnetic resonance measurement. The first set of coil elements is not congruent with the second set of coil elements.

A magnetic resonance tomography unit includes a transmitter, a transmission monitoring device for monitoring an excitation signal from the transmitter, and a plurality of transmit antennas. The magnetic resonance tomography unit also includes a switching device configured to bring the transmission monitoring device selectively into a signal connection to one transmit antenna of the plurality of transmit antennas. A method for operating the magnetic resonance tomography unit is also provided.

A magnetic resonance detection (MRD) system for and methods of detecting and classifying multiple chemical substances is disclosed. In one example, the presently disclosed MRD system is a nuclear quadrupole resonance (NQR) detection system that provides multi-frequency operation for substantially full coverage of the explosive NQR spectrum using a broadband transmit/receive (T/R) switch (or duplexer) and a single multi-frequency radio frequency (RF) transducer. More particularly, the MRD system provides a frequency-agile system that can operate over a wide band of frequencies or wavelengths. Further, a method of detecting and classifying various chemical substances is provided that includes pulse sequencing with “frequency hopping,” phase cycling for reducing or substantially eliminating background noise, and/or a process of mitigating amplitude modulation (AM) radio interference.

The disclosure relates to techniques for adjusting at least one measurement parameter for a measurement protocol for a magnetic resonance examination. The techniques include providing at least one item of parameter information for adjusting a value of the at least one measurement parameter, wherein the at least one item of parameter information is provided independently of coil information for the magnetic resonance examination, and selecting a value of the at least one measurement parameter. The techniques further include transmitting the selected value to a protocol adjusting unit connected to the scanner unit of the magnetic resonance apparatus, providing coil information of the scanner unit, and automatically adjusting the value of the at least one measurement parameter based on the coil information provided.

The present disclosure relates to techniques for the selection of one or more measuring coils in magnetic resonance imaging. Herein, account can be taken of a preselection in the selection of the one or more measuring coils from a plurality of candidate coils.

A magnetic resonance imaging apparatus includes a T/R switch. The T/R switch includes a double sided microstripline based hybrid couplers with a top side and a bottom side each including two concentric microstripline based hybrid couplers. Each of the two concentric microstripline based hybrid couplers includes an inner microstripline based hybrid coupler and an outer microstripline based hybrid coupler. The inner microstripline based hybrid coupler forms an inner loop of the two concentric microstripline based hybrid couplers and the outer microstripline based hybrid coupler forms an outer loop. In a transmission mode, the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side of the dual-tuned T/R switch are activated. In a receiving mode the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side and at the bottom side of the dual-tuned T/R switch are activated.

A magnetic resonance imaging apparatus includes a T/R switch. The T/R switch includes a double sided microstripline based hybrid couplers with a top side and a bottom side each including two concentric microstripline based hybrid couplers. Each of the two concentric microstripline based hybrid couplers includes an inner microstripline based hybrid coupler and an outer microstripline based hybrid coupler. The inner microstripline based hybrid coupler forms an inner loop of the two concentric microstripline based hybrid couplers and the outer microstripline based hybrid coupler forms an outer loop. In a transmission mode, the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side of the dual-tuned T/R switch are activated. In a receiving mode the inner microstripline based hybrid coupler and the outer microstripline based hybrid coupler at the top side and at the bottom side of the dual-tuned T/R switch are activated.

The present disclosure may provide a coil assembly. The coil assembly may include a supporting assembly and a radio frequency (RF) coil supported on the supporting assembly. The RF coil may have a plurality of coil units and a plurality of transmission ports. At least one of the plurality of transmission ports may be operably connected to a single coil unit of the plurality of coil units. Each of the plurality of transmission ports may be configured to transmit a drive signal to one of the plurality of coil units for generating a magnetic field.

In one embodiment, an MRI apparatus includes: a transmission circuit configured to apply a transmission pulse to an object; at least one radio frequency (RF) coil configured to include an active trap circuit provided with a PIN diode, and to receive a magnetic resonance signal from the object; a power supply circuit configured to apply a reverse bias voltage and a forward bias voltage to the PIN diode, and to apply multiple values of a forward current when the forward bias voltage is applied to the PIN diode; and a control circuit configured to control the power supply circuit in such a manner that the power supply circuit sets the forward current to the multiple values, depending on imaging conditions.