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.

Interventional localization guides and methods for MRI guided pelvic interventions are disclosed. The interventional localization guides can include a stereotactic perineum positioning device having integrated MR receive coil array and fiducial receive array. The interventional localization guide can also include a physical template for guiding a surgical device, such as a biopsy needle. In various instances, the MRI guided pelvic interventions including co-registering biopsy locations on third party MRI scans.

A double-resonant coil includes a closed conductor loop divided into at least two segments that are each connected via a second connection element configured to be converted from an electrically conductive state to an electrically insulating state. The double-resonant coil further includes an inductor or a capacitor connected in series to a first connection element so as to allow excitation of the closed conductor loop in a dipole mode at one frequency and with a homogeneous power distribution at a second frequency.

A local coil for a magnetic resonance tomography scanner has an antenna. The antenna has a conductor loop and a plurality of electronic function groups, which are arranged in a distributed manner spaced apart from one another along the conductor loop and are electrically connected to one another by flexible conductor segments.

A supine torso radio frequency (RF) coil assembly for a magnetic resonance (MR) system is provided. The RF coil assembly includes an RF coil array and a lining. The RF coil array includes a plurality of RF coils each RF coil including a coil loop that includes a wire conductor, the wire conductor formed into the coil loop and a coupling electronics portion coupled to the coil loop. The plurality of RF coils form into a contoured portion, the contoured portion sized to receive at least part of a breast of a subject therein. The lining includes a contoured portion. The RF coil array is coupled to and distributed on the lining, the contoured portion of the RF coil array covering and conforming with the contoured portion of the lining.

A method for producing a streak-suppressed MR image of a subject includes (i) generating an interference correlation matrix from M coil images, (ii) producing eigenvectors of the interference correlation matrix, and (iii) determining, from the subspace-eigenvectors, a projection matrix of the interference null space. The subspace-eigenvectors include a plurality of subspace-eigenvectors that span an interference subspace and a plurality of null-space-eigenvectors that span an interference null space. The method also includes generating, from N coil images derived from a respective one of N MR signals, N streak-suppressed multi-coil images by either (i) preprocessing the N coil images with the projection matrix and applying an image-reconstruction technique to each of the resultant N preprocessed coil images, or (ii) applying an image-reconstruction technique to each of the N coil images to obtain N reconstructed coil images and post-processing the resultant N reconstructed coil images with the projection matrix.

The invention also refers to a flexible coil element for a flexible coil array, for a magnetic resonance imaging apparatus. The invention also refers to a flexible coil array, for a magnetic resonance imaging apparatus, for indicating a loading state of a flexible coil element being positioned on at least one inductive element. The invention also refers to a method for indicating a loading state of a flexible coil element being positioned on at least one inductive element. The flexible coil element is comprised by a flexible coil array, wherein the flexible coil array comprises at least one flexible coil element. Furthermore, the invention refers to a software package comprising instructions for carrying out the method steps.

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.

The present disclosure provides a magnetic resonance imaging (MRI) radio frequency (RF) coil assembly. The MRI RF coil assembly may include one or more coils and one or more control circuits. Each of the one or more coils may include a first end and a second end. Each of the one or more control circuits may electrically connect the first end and the second end of one of the one or more coil. Each of the one or more control circuits may be configured to adjust an operation of the coil that is electrically connected with the control circuit based on an input control signal. The one or more control circuits may be located at different regions.

An upper coil assembly for use with a lower RF coil assembly mounted to provide an RF probe arranged to be engaged with a head of a patient in MRI includes a plurality of coil loops arranged in a row defining a phase shift coil array with each coil loop including an independent output conductor for communicating signals to a respective preamplifier for independent amplification and each coil loop including a plurality of capacitors at spaced positions therearound. To decouple the loops each coil loop partly overlaps a next coil loop with a first decoupling capacitor shared on a common portion of each coil loop and each next coil loop. The first and third coil loops are also decoupled by using third decoupling capacitor in a connecting conductor between the first and third coil loops.