A magnetic resonance (MR) imaging system includes a transmit radio frequency (RF) coil assembly comprising multiple capacitor banks each coupled to at least one diode that is characterized by a high breakdown voltage such that when the transmit RF coil assembly applies at least one slice-selecting RF pulse to a portion of a subject placed in the magnet to select a particular slice for MR imaging, the capacitor banks are selectively adjusted to improve an RF transmission characteristics of the RF coil assembly in transmitting the at least one slice-selecting RF pulse. The MR imaging system may further include a receive radio frequency (RF) coil assembly configured to, in response to at least the slice-selecting RF pulse, receive at least one response radio frequency (RF) pulse emitted from the selected slice of the portion of the subject; a housing; a main magnet; gradient coils; and a control unit.

The present disclosure may provide a radio frequency transmission device. The radio frequency transmission device may include: a radio frequency power amplifier (RFPA) configured to produce a radio frequency signal; and a transmitter coil status selection module configured to transmit the radio frequency signal to at least one of a plurality of radio frequency coils. The RFPA and the transmitter coil status selection module may be housed in a device chamber.

The present disclosure relates to a magnetic resonance imaging (MRI) radio frequency (RF) array coil that includes first and second physical RF coils inductively coupled. A first matching circuit and a second matching circuit are coupled to the first physical RF coil and the second physical RF coil, respectively, and are coupled in a parallel configuration at a first RF port. A third matching circuit and a fourth matching circuit are coupled to the first physical RF coil and the second physical RF coil, respectively, and are coupled in an anti-parallel configuration at a second RF port. A first logical RF coil is formed by the first and second physical RF coils and the first and second matching circuits. A second logical RF coil, which is decoupled from the first logical RF coil, is formed by the first and second physical RF coils and the third and fourth matching circuits.

A magnetic resonance (MR) apparatus is provided. The MR apparatus may include at least one processor. The at least one processor may be configured to obtain an operating state of the MR apparatus; and select, from two or more power supply devices, a power supply device for supplying power for at least one coil of the MR apparatus according to the operating state of the MR apparatus. The at least one processor may be configured to obtain, through a relay component connected to a coil section, motion information of at least one component of the coil section; and generate, based on the motion information, control instructions for adjusting communication parameters of a first directional communication module of the coil section and a second directional communication module of the relay component.

A transmitter for a magnetic resonance (MR) system, such as nuclear magnetic resonance (NMR) system, is described herein. The transmitter includes a coil for applying NMR pulse sequences to a substance. The coil includes a first coil section and a second coil section. The first coil section and second coil section pass current in opposite polarity. The transmitter may also include a transmitter circuit for generating the NMR pulse sequences and providing the NMR pulse sequences to the coil. The transmitter circuit includes a first switch that selectively powers the first coil section and a second switch that selectively powers the second coil section. Operation of the first switch and the second switch generates the NMR pulse sequences.

In a magnetic resonance coil selection method and selection computer, a range parameter of a target region (ROI) to be detected is acquired, and a detection range parameter of each available coil is acquired. A coil having a detection range that overlaps with a range of the ROI is determined and then selected. The selected coil is then used in the operation of a magnetic resonance scanner to acquire magnetic resonance data. The SNR of the magnetic resonance scanner is thereby increased, so as to improve the imaging quality.

In a method and apparatus to acquire magnetic resonance image data; an examination subject is positioned in a magnetic resonance apparatus to acquire magnetic resonance image data of the examination subject with a magnetic resonance sequence, and sequence parameters of the magnetic resonance sequence are established. First control commands of the magnetic resonance sequence are generated using the established sequence parameters. The first control commands are optimized so as to generate an optimized magnetic resonance sequence, the optimization of the first control commands including a conversion of the first control commands into optimized control commands. A test to review the optimized magnetic resonance sequence is implemented, the test including a comparison of the first control commands with the optimized control commands. The optimized magnetic resonance sequence is executed to acquire the magnetic resonance image data with the optimized control commands depending on the result of the test.

A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry and a display. The processing circuitry acquires information of an RF (radio frequency) coil. The processing circuitry sets a protocol to be applied to imaging using the RF coil before execution of the imaging. When there are a plurality of protocols that can be selected as the protocol applied to the imaging, the display displays at least one protocol narrowed down from the protocols as the protocol that can be applied to the imaging, based on information of the RF coil.

Method and apparatus for hardware coil compression is disclosed. The coils in an array configured for the same region of interest are grouped into sub-arrays. The coils of each sub-array are pre-combined with a hardware combiner before further processing. The pre-combination converter composed of the pre-combiners is flexible, i.e., applicable to for example non-cylindrical coils; simpler than direct implementation of the software compression algorithm; and commercially feasible.

An adapter includes a control circuit, a control signal interface, a first input signal interface, a second input signal interface, and a first output signal interface. The control signal interface receives a tuning/detuning signal, and the control circuit switches, according to the tuning/detuning signal, the first input signal interface and the second input signal interface to be in conduction with the first output signal interface.