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Match Document Document Title
7301344 Q-damping circuit including a high temperature superconductor coil for damping a high temperature superconductor self-resonant coil in a nuclear quadrupole resonance detection system  
The use of a high temperature superconductor single loop or coil in the Q-damping circuit for a high temperature superconductor transmit, receive, or transmit and receive self-resonant coil in a...
7297907 Means and method of maintaining a constant temperature in the magnetic assembly of a magnetic resonance device  
The present invention discloses a novel active insulation device and method for thermally shielding an external body from temperature fluctuations of a contained body. The method comprising...
7298145 Radiofrequency magnetic field resonator and a method of designing the same  
A radiofrequency (RF) resonator for magnetic resonance analysis, the RF resonator comprising: (a) at least two conductive elements, each having a first curvature along a direction perpendicular to...
7295012 Methods and apparatus for MRI shim elements  
A MRI shim element includes a plurality of thin wires extending substantially parallel to each other wherein each wire has cross sectional dimensions less than δ sk , wherein δ sk is the wire's...
7295009 Planar NMR coil with gyromagnetic arc suppression  
A magnetic resonance RF coil comprises a conductive material deposited on a dielectric substrate. The conductive material includes magnetic field generating elements used to generate an RF magnetic...
7292041 Q-damping circuit including a diode acting as a resistor for damping a high temperature superconductor self-resonant coil in a nuclear quadrupole resonance detection system  
The use of a bias controlled diode in the Q-damping circuit of a high temperature superconductor transmit, receive, or transmit and receive self-resonant coil in a nuclear quadrupole resonance...
7292038 Double-balanced double-tuned CP birdcage with similar field profiles  
The MRI rf coil known as the balanced high-pass-weighted hybrid birdcage is modified to obtain two homogeneous degenerate resonances, capable of generating circular polarization at widely separated...
7292036 MRI system having reduced acoustic noise  
A magnetic resonance imaging (MRI) system includes a gradient coil system. The gradient coil system comprises an inner coil configuration ( 1,2,3 ) and an outer coil configuration ( 4,5,6 )...
7288939 Cryogenic NMR probe  
The thermal performance and vacuum properties of a cryogenic NMR probe are improved when thermal control is implemented by conductive heat transfer to a cold head cooled by a heat exchanger to...
7288938 Connection system for split-top RF coils  
A split-top RF coil is provided. The split-top RF coil includes a first housing ( 80 ) having a first RF coil portion ( 41 ) disposed therein and a second housing ( 84 ) having a second RF coil...
7285956 Nuclear magnetic resonance device  
A nuclear magnetic resonance apparatus includes a nuclear magnetic resonance device for elucidating atomic configuration and molecular structure of a substance based on a decay signal of induced...
7285957 Method and apparatus to generate a circular polarized RF field independent of subject asymmetry  
An RF coil assembly is presented that incorporates balun networks to eliminate standing waves from cables used to apply a voltage to multiple drive ports of the coil. Each drive port is driven by...
7282915 Multi-turn element RF coil array for multiple channel MRI  
An RF coil assembly for use in a multiple receive-channel MRI system is provided. The RF coil assembly is configured as a multi-turn-element RF coil assembly to operate as a surface-coil array in...
7276906 Self-shielded gradient field coil for magnetic resonance imaging  
A gradient coil for a magnetic resonance imaging apparatus ( 10 ) includes a primary coil ( 16 ) defining an inner cylindrical surface ( 60 ), and shield coil ( 18 ) or coils defining a coaxial...
7276909 RF transmission method, MRI apparatus, and auxiliary coil  
An object of the present invention is to intensify the strength of a magnetic field to be applied to a subject. An auxiliary coil is interposed between a body coil incorporated in a magnet assembly...
7271589 Probe head for nuclear magnetic resonance measurements  
A probe head for nuclear magnetic resonance measurements in an area of a surface of a measuring object is disclosed. The probe head comprises first means for generating a static magnetic field...
7268553 Method and apparatus for magnetic resonance imaging  
Magnet assembly for use in medical magnetic resonance imaging includes means for increasing flux generation in the gap region to provide the capability of scanning smaller volume regions of a...
7268550 Antenna element and antenna arrangement for magnetic resonance applications  
An antenna element for magnetic resonance applications has at least one sub-section that extends along a section axis and is adjacent to an auxiliary circuit. The antenna element has a coupling...
7268554 RF coil for imaging system  
An RF coil suitable for use in imaging systems is provided which coil has a dielectric filled cavity formed by a surrounding conducting enclosure, the conducting enclosure preferably being...
7266406 Magnetic resonance apparatus  
In a magnetic resonance apparatus, the transmission coil for generating the radiofrequency excitation field is stationarily arranged. The geometry of the transmission coil is permanently...
7259562 RF coil for a highly uniform B1 amplitude for high field MRI  
An array coil to achieve more uniform RF excitation for high field magnetic resonance imaging. In the preferred embodiment, the array coil has a plurality of transmit-composite elements distributed...
7256581 Magnetic resonance apparatus with displaceable C-arm mount for an additional gradient coil unit  
A magnetic resonance apparatus has a scanner having a basic field magnet, a stationary gradient coil unit, an antenna system for acquisition of magnetic resonance signals, and a second gradient...
7253627 Method for removing noise from nuclear magnetic resonance signals and images  
The method for removing noise from nuclear magnetic resonance signals and images involves removing noise from NMR signals through the application of stable linear time-frequency (SLTF) transforms....
7253626 Multi-loop receiver coil having a large tuning range for a magnetic resonance imaging system  
A receiver coil loop for a magnetic resonance imaging system has a tuning loop for adjusting a tuning capacitor to make the tuning loop resonate at a center frequency a detuning loop for...
7253625 Precision gradient amplifier with multiple output voltage levels  
A controlled power supply ( 20 1 , 22 2 ) drives a magnetic field gradient coil ( 16 1 ) of a magnetic resonance imaging apparatus ( 10 ). A gradient amplifier ( 20 1 ) includes a plurality of...
7253621 Method and system to dynamically configure transmit receive coils to calibrate a magnetic resonance imaging system  
Magnetic Resonance Imaging (MRI) systems including a coil system and methods for controlling the coil system are described. A described system includes a coil system for MRI. The coil system...
7248051 Receiver coil array for a magnetic resonance imaging system  
A receiver coil array for a magnetic resonance imaging system has multiple receiver coil loops that are decoupled from each the by a decoupling circuit that connects a pair of decoupling capacitors...
7248046 Decoupling high temperature superconductor sensor arrays in nuclear quadrupole resonance detection systems  
The decoupling of an array of two or more closely spaced high temperature superconductor sensors can be accomplished by introducing a capacitive decoupling circuit.
7242193 Magnetic resonance cylindrical body coil and method for generating a homogeneous RF field  
A magnetic resonance apparatus has a cylindrical body coil composed of a number of resonator segments distributed around the circumference and a control device for separate activation of the...
7239144 Antenna amplifier, in particular for a magnetic resonance antenna  
An antenna amplifier, in particular for a magnetic resonance antenna, has a sheath wave barrier integrated into the signal path of the antenna amplifier in the form of a component designed...
7239139 RF coil system for a magnetic resonance imaging apparatus  
A device for the transmission and/or reception of RF signals for magnetic resonance imaging (RF coil system) is constructed as an RF coil (body coil) which is permanently mounted in a magnetic...
7239143 Digital magnetic resonance gradient pre-emphasis  
A magnetic field gradient system includes a magnetic field gradient coil ( 20 ) and a magnetic field gradient amplifier ( 30 ) that operatively communicates with the magnetic field gradient coil (...
7235974 Magnetic resonance system with suppression of capacitive coupling between an RF source and the subject  
An examination subject arranged in an examination volume of a magnetic resonance system can be excited to magnetic resonance by an RF transmission antenna. The RF transmission antenna is fashioned...
7233148 Sheath wave barrier unit  
A sheath wave barrier unit for an outer shielding of a coaxial cable that also has an inner conductor, has two sheath wave barriers that damp or suppress sheath waves that are induced in two series...
7230425 MRI system with wireless identification capability  
A magnetic resonance apparatus includes a main magnetic field generating assembly ( 12 ) located in a magnetic resonance suite generates a substantially spatially constant main magnetic field...
7230429 Method for applying an in-painting technique to correct images in parallel imaging  
The subject invention pertains to a method and apparatus for producing sensitivity maps with respect to medical imaging. The subject invention relates to a method for applying an inpainting model...
7230426 Split-shield gradient coil with improved fringe-field  
An imaging system 2 is provided comprising a primary gradient coil assembly 52 and a shield coil assembly 42 . The shield coil assembly 42 is connected in series to the primary gradient coil...
7227360 Phased array MRI coil with controllable coupled ring resonator  
A coil for magnetic resonance imaging operates in a transmit mode with multiple loops locked together in a phase relationship like a birdcage coil to provide a uniform transmission field, but in a...
7221159 Communication systems for use with magnetic resonance imaging systems  
An antenna coupling enables communication across a barrier to radio frequencies. The antenna coupling comprises first and second antennas. The first antenna is adapted for positioning on a first...
7221162 RF transmitter arrangement for an MR system, and method for determining a setting parameter therefor  
A radio frequency transmitter arrangement for a magnetic resonance apparatus has a distribution unit and an antenna unit, wherein the antenna unit, to generate radio frequency fields, is fashioned...
7221163 Magnetic resonance system with suppression of capacitive coupling between an RF source and the subject  
A magnetic resonance system has a transmission antenna that excited magnetic resonance signals in an examination subject arranged in an examination volume, a radio-frequency source that is...
7215121 Balun arrangement and installation method thereof for a magnetic resonance apparatus  
A balun arrangement for a magnetic resonance apparatus which in some embodiments further comprises a cable member comprising at least one first ground end and at least one second ground end. A...
7205768 Connection lead for an electrical accessory device of an MRI system  
A magnetic resonance imaging apparatus is provided with one or more electrical accessory devices, for example, catheters ( 10 ) or RF body coils ( 6 ), which are intended for use during the...
7196522 Power circuit of a coil and probe and NMR spectrometer comprising such a circuit  
A power circuit of a coil, includes two power or transmission line segments that are each connected to one of two ends of this coil, the line segments forming with the coil an oscillating circuit...
7197353 Sensitivity encoding MRI acquisition method  
A sensitivity encoding method (SENSE) is used to acquire an MR image having a reduced field of view. The number of aliased replicates caused by surrounding object boundaries is calculated for each...
7193418 Resonator system  
A resonator system for generating a radio frequency (RF) magnetic field in a volume under investigation of a magnetic resonance (MR) arrangement, comprises a number N of individual resonators ( 2 )...
7193414 Downhole NMR processing  
An expert system is included in a downhole processor designed to acquire and process NMR data downhole in real time. The downhole processor controls the acquisition of the NMR data based at least...
7193419 Modular cascaded detuning circuit for antennas in MRI apparatuses  
A detuning circuit unit for antennas of a magnetic resonance apparatus has at least two identical detuning modules that are connected in a cascade circuit and can be simultaneously activated with a...
7190165 Tunable superconducting resonator and methods of tuning thereof  
A method of tuning a high temperature superconductor (HTS) resonator includes the steps of providing a HTS inductor and a HTS capacitor, the HTS capacitor being electrically connected to the HTS...
7187176 NMR probe circuit with nodal impedance bridge  
A nuclear magnetic resonance (NMR) probe circuit is used with a sample coil tuned to a primary frequency f 1 . The circuit is arranged to have a plurality of points of electric field minima at the...
Matches 151 - 200 out of 1182 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >