Abstract: A multidrop cable may include multiple nodes electrically coupled thereon. The nodes may each include a respective PCB layer and a respective connector. The connector may provide connection between the transmission lines of the multidrop cable and the PCB layer. The PCB layer may include circuitry to reduce an induced noise of the multidrop cable by adding twist to the respective signals of the transmission lines. The PCB layer may also preserve the characteristic impedance of the multidrop cable by providing inductance in series between the respective signals of the transmission lines.

Abstract: In one example, a method for acquiring a medical image includes activating a body radiofrequency (RF) coil in a body coil receive mode to obtain body calibration information of a subject. The method further includes, while the body RF coil is in the body coil receive mode, activating a surface RF coil in a surface coil receive mode to obtain surface calibration information of the subject, and correcting a reconstructed image with an intensity correction filter determined from the body calibration information and surface calibration information.

Abstract: A MRI system includes a RF coil assembly, a gradient coil assembly disposed around the RF coil assembly, the gradient coil assembly including a RF shield, and a superconducting magnet assembly disposed around the gradient coil assembly, the superconducting magnet assembly including a vessel containing a plurality of superconducting coils. The RF coil assembly includes a plurality of RF coil elements applied on an outer surface of a hollow cylindrical RF coil former. The plurality of RF coil elements includes a plurality of rungs and a plurality of ground patches that are connected. The plurality of ground patches are spaced apart from the RF shield with a dielectric material in between, and the plurality of ground patches are capacitively coupled to the RF shield. The RF coil assembly is a TEM RF body coil.

Abstract: In one example, a method for acquiring a medical image includes activating a body radiofrequency (RF) coil in a body coil receive mode to obtain body calibration information of a subject. The method further includes, while the body RF coil is in the body coil receive mode, activating a surface RF coil in a surface coil receive mode to obtain surface calibration information of the subject, and correcting a reconstructed image with an intensity correction filter determined from the body calibration information and surface calibration information.

Abstract: A radio frequency (RF) body coil includes a first end ring, a second end ring, a plurality of rungs connected between the first and second end rings, at least one shim holder coupled to the first end ring, and a RF shim configured to be at least partially inserted within the shim holder, the RF shim being repositionable within the shim holder to vary an operational frequency of the RF body coil. A magnetic resonance imaging system and a method of tuning the RF body coil are also described.

Abstract: A radio frequency (RF) birdcage coil includes a first distributed capacitance end ring, a second distributed capacitance end ring, and a plurality of rungs connected between the first and second end rings, wherein at least one of the first and second distributed capacitance end rings includes a substrate having a first side and a second side, a first plurality of conductors formed on the first side, a second plurality of conductors formed on the second side, and an insulating material deposited on the first side such that the insulating material substantially covers the first plurality of conductors.

Abstract: A radio frequency (RF) body coil includes a first end ring, a second end ring, a plurality of rungs connected between the first and second end rings, at least one shim holder coupled to the first end ring, and a RF shim configured to be at least partially inserted within the shim holder, the RF shim being repositionable within the shim holder to vary an operational frequency of the RF body coil. A magnetic resonance imaging system and a method of tuning the RF body coil are also described.

Abstract: A radio frequency (RF) birdcage coil includes a first distributed capacitance end ring, a second distributed capacitance end ring, and a plurality of rungs connected between the first and second end rings, wherein at least one of the first and second distributed capacitance end rings includes a substrate having a first side and a second side, a first plurality of conductors formed on the first side, a second plurality of conductors formed on the second side, and an insulating material deposited on the first side such that the insulating material substantially covers the first plurality of conductors.

Abstract: A RF coil for use with a resonance imaging device, the RF coil comprises a conductor comprising a first conductive region, a second conductive region substantially isolated from the first portion along its length, and at least one coupling portion adjacent to ends of the first and second portions and configured to electrically couple the first and second portions at a first predetermined frequency. The coil further includes a dielectric substrate supporting the conductor. The RF coil is configured to perform one of excitation, detection, reception, or a combination thereof. A method of using one or more RF coil is further disclosed.