A hybrid antenna array for use in an MRI device, the array comprising a plurality of loop-line elements, each loop line element comprising a loop element and a line element, wherein the loop element and the line element are aligned along their respective center axis and coupled at an input coil port; and wherein the plurality of loop-line elements are configured to operate in a multi-channel array.

A system for transcranial magnetic resonance (MR)-guided focused ultrasound and method of using transcranial MR-guided focused ultrasound are disclosed. The system includes a transcranial ultrasound transducer configured to apply ultrasound radiation to a patient's head. The system also includes an antenna that reflects radio frequency (RF) waves. The antenna is configured to be positioned between the transducer and the patient's head. The antenna and at least a portion of the patient's head are surrounded by a fluid. Embodiments foster improved MR image quality scans of the patient's head when the transducer is filled with the fluid.

A magnetic resonance transmit and/or receive antenna system configured for being used in combination with a magnetic resonance radiotherapy system. The antenna system can include at least one antenna for transmitting and/or receiving radio frequency signals and a cover enclosing the antenna components. The antenna can include antenna components and the cover can include a spatially varying thickness and/or density towards an outer edge of the surface and/or next to an antenna component as to make the change in radiation attenuation between the enclosing cover compared to the antenna component and/or air more gradual.

A device and method for detecting motion and position of a patient positioned within a magnetic resonance imaging system, the device including at least one sensor configured to be capacitively coupled to the patient during magnetic resonance imaging. The method includes, while a patient is positioned within a magnetic resonance imaging system, measuring a reflected power value indicative of an amount of power reflected by the at least one sensor in response to being driven by at least one RF signal, and determining, using the reflected power value, whether the patient has moved.

A method of internal MRI employing at least one active internal MRI detector located within a sample of interest. The method includes applying an MRI pulse sequence to the sample of interest. The MRI pulse sequence includes spatial encoding projections. The method further includes receiving MRI signals at the active internal MRI detector and reconstructing at least one MRI image from the MRI signals using an error minimizing algorithm. The MRI pulse sequence provides an increase in an acquisition speed when reconstructing the at least one MRI image by sparsely under-sampling an image k-space in at least one dimension.

A magnetic resonance spectroscopy and imaging device and method of use for accurately delineating the lateral extent and depth of a skin tumor. The device includes a radiofrequency tuned circuit with an antenna in the shape of an acupuncture needle that is positionally-controlled using a mechanical actuator to provide high-contrast spatial images of skin tumors with sub-millimeter lateral and depth resolution. The device is used by dermatologists to provide accurate spatial demarcations of skin tumors, which facilitate the complete excision of a tumor in the first pass of the Mohs micrographic surgical procedure. Different sizes and shapes of the needle antenna provide advantages for sensitivity, image resolution, and capabilities to impact treatments. A hollow needle antenna provides for a capability of the inventive device to affect treatment of a skin tumor by injecting a chemical agent while monitoring chemical and spatial aspects of the tumor, and by aspirating cancer tissue to remove the tumor and related chemical treatment agents.

The present disclosure relates to an antenna assembly for an imaging method, a use of an antenna assembly and a tomography system, in particular for MRI or simultaneous MR-PET/-SPECT. An antenna assembly for an imaging method comprises at least two antennas, wherein each of the two antennas is designed as a J-pole antenna with a radiation section and a feed section. The radiation sections of the two antennas are arranged crossing each other. In this way, effective decoupling of the antennas is achieved by simple means.

A circular dipole antenna (e.g., for a magnetic imaging system) according to exemplary embodiments of the present disclosure can comprise a circular conductor with a feed point on one side and a gap on the other. A surface coil loop antenna (e.g., for magnetic imaging system) is provided with a capacitor arrangement selected for non-uniform or unbalanced current distribution, with corresponding magnetic and electric dipole fields provided in a single structure referred to as a loopole.

A passive MRI enhancing embodiment includes a plurality of resonators and increases signal-to-noise ratio of radiofrequency signals emitted by a specimen and captured by an MRI machine. The apparatus increases the magnetic field component of radiofrequency energy during signal transmission from the MRI machine to the specimen, and/or reception of signals from the specimen to the MRI machine. Use of the apparatus improves the images generated by the MRI machine, and/or reduces the time necessary for the MRI machine to capture the image. An isolator embodiment has a nonlinear resonator controllably configurable alternately into an isolation configuration and a transmission configuration, and a second resonator. The nonlinear resonator is coupled to a communications port and is substantially communicatively isolated from the second resonator when the nonlinear resonator is in the isolation configuration, and is communicatively coupled to the second resonator when the nonlinear resonator is in the transmission configuration.

A dipole antenna array includes at least two dipole antenna elements. Each respective dipole antenna element has at one end a fold which consists of a bend, a bent region, and the projection of the bent region of the dipole antenna element onto a length of the dipole antenna element. Each respective dipole antenna element at least partially encloses a cavity.