Abstract: A metamaterial (MTM) slab for a Magnetic Resonance Imaging (MRI) system passively interacts with a field generated by a transmit device to improve homogeneity of the field, specific absorption rate, and/or strength of the field. The MTM slab may also be connected to RF receive circuitry at one or more ports to act as a receiver for the MRI. The MTM slab may comprise a first layer generally defining a surface and a second layer offset from the surface generally defined by the first layer, the first layer and the second layer interacting to form a 2D transmission line supporting radio frequency (RF) current along the surface in a first direction and in a second direction transverse to the first direction, the first layer and the second layer being connected via linking capacitors.

Abstract: A metamaterial (MTM) slab for a Magnetic Resonance Imaging (MRI) system passively interacts with a field generated by a transmit device to improve homogeneity of the field, specific absorption rate, and/or strength of the field. The MTM slab may also be connected to RF receive circuitry at one or more ports to act as a receiver for the MRI. The MTM slab may comprise a first layer generally defining a surface and a second layer offset from the surface generally defined by the first layer, the first layer and the second layer interacting to form a 2D transmission line supporting radio frequency (RF) current along the surface in a first direction and in a second direction transverse to the first direction, the first layer and the second layer being connected via linking capacitors.

Abstract: A liner for a bore of an MRI scanner having a magnetic field. The liner comprises: plural conductors extending circumferentially within a liner region of the bore; circumferential impedances on the plural conductors; and radial impedances connecting the plural conductors to a radially outer conductive structure.

Abstract: The sensing system for measuring a parameter of a dielectric substance generally has a tank for containing the dieletric substance; a directional sensor having; an antenna comprising at least one array of at least two antenna elements, the antenna elements being ultra-wide band antenna elements, the antenna being mounted to the tank and adapted to emit a signal comprising radiated electromagnetic energy toward the at least one dielectric substance and along a signal path, the antenna being further adapted to detect a signal after propagation thereof along the signal path; an antenna controller being operatively coupled to the antenna, the antenna controller being adapted to drive the emitted signal based on emission data, adapted to detect the detected signal and to generate detection data indicative of the detected signal; and a computing device operatively coupled to the antenna controller, the computing device being configured to determine the parameter.