摘要:
A material for a magnetic resonance installation is provided, wherein the material includes a support material and a magnetic doping material which is admixed in a specific proportion. The doping material exhibits an anisotropic susceptibility. In respect of the anisotropic susceptibility, the doping material exhibits a mean orientation along a predefined direction. An essentially homogeneous intermixture of the support material and the doping material is present within a volume of the material which is smaller than 1 mm3.
摘要:
A magnetic resonance coil for transmitting and/or receiving magnetic resonance signals is provided. The magnetic resonance coil includes at least two overlapping coil elements. Coil conductors of the at least two overlapping coil elements intersect in intersection regions and are arranged on a support. Mutually overlapping coil elements of the at least two overlapping coil elements are arranged on different sides of the support. The support is formed from at least three layers of a support material. A cavity that is filled with air or a filler material, the dielectric constant of the filler material being lower than the dielectric constant of the support material, is provided in the intersection regions in a middle layer of the at least three layers.
摘要:
A magnetic resonance facility having a cylindrical patient receiving unit includes a high-frequency shield. The high-frequency shield is disposed to enclose the patient receiving unit and shield at least one high-frequency coil from a gradient coil arrangement. The high-frequency shield is extendable to form a shielded chamber that shields the high-frequency coil from high-frequency signals outside the shielded chamber.
摘要:
A local screen screens out magnetic resonance signals of an object under examination during magnetic resonance imaging with a magnetic resonance device. The local screen includes a plurality of electrically conductive local screen elements that are arranged such that no direct electrically conductive connection pertains between the local screen elements. The local screen further includes a carrier device for accommodating the local screen elements and a number of switching devices that are connected in an electrically conductive manner to the local screen element, and are embodied such that the electrical resistance may be controlled by a number of screen control signals. In addition, the local screen includes a number of screen control signal inputs for the number of screen control signals.
摘要:
A local coil for an imaging system includes a number of shim coils. A current for generating a shim field in one of the shim coils may be switched on and switched off. A current for generating a shim field in another of the shim coils may be switched on and switched off. The currents may be switched on and switched off independently of one another for generating a respective shim field in the shim coils.
摘要:
A local coil for an imaging system includes an anterior torso part and a posterior torso part that are detachably connected to one another with a fastening device.
摘要:
A local coil includes a transmitter, to which magnetic resonance signals are supplied and which modulates a carrier signal oscillating at a carrier frequency using the magnetic resonance signals. The local coil includes a transmitting antenna, to which the modulated carrier signal is supplied and which sends the modulated carrier signal in a beam to a control and evaluation device of a magnetic resonance system. The beam has a mean direction of radiation. In a vertical plane containing the mean direction of radiation, the beam covers a vertical angle, and in a transverse plane containing the mean direction of radiation and running orthogonally to the vertical plane, the beam covers a transverse angle. The local coil includes an adjusting device that adjusts the mean direction of radiation independently of the orientation of the local coil relative to the vertical.
摘要:
An imaging device for a joint of a human is made of an HF transparent material. The imaging device has a base element that may be fastened to a patient bed of a magnetic resonance system. The imaging device includes a bearing element, in which a joint region of an extremity of the human may be supported when the base element is fastened to the patient bed. The bearing element and the base element are connected movably to each other by a guiding structure such that when the base element is fastened to the patient bed, the bearing element may be positioned in a plurality of defined positions relative to the base element.
摘要:
A local coil for a magnetic resonance device includes a double resonance conductor loop arrangement having at least one conductor loop, and a converter apparatus configured for converting operating energy received at a first resonance frequency into an operating voltage. The local coil also includes an electronics arrangement operated with the operating voltage for processing magnetic resonance signals received at a second resonance frequency.
摘要:
A local coil for magnetic resonance applications includes a rigid housing that radially surrounds a substantially cylindrical examination volume. Arranged in the rigid housing is a transmitting coil, by which an excitation signal may be applied to the examination volume. An object to be examined arranged in the examination volume may be excited by the excitation signal for emitting a magnetic resonance signal. The local coil includes a size-variable structure, in which an antenna assembly for receiving the magnetic resonance signal emitted by the object to be examined is arranged. The size-variable structure is arranged in the examination volume and is connected to the rigid housing. The size-variable structure is soft and flexible.