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7616000 |
Ultra low output impedance RF power amplifier for parallel excitation
An ultra low output impedance RF power amplifier for driving a multiple transmit coil Magnetic Resonance Imaging (MRI) system is described, comprising an output matching network with high power...
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7615999 |
Method and circuit arrangement for operating multi-channel transmit/receive antenna devices
Methods and circuit arrangements for operating a multi-channel transmit/receive antenna device or arrangement, especially for use in a magnetic resonance imaging (MRI) system, are disclosed by...
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7615997 |
Simultaneous MR-excitation of multiple nuclei with a single RF amplifier
A medical imaging system ( 2 ) excites multiple nuclei through a single RF amplifier ( 24 ). The medical imaging system ( 2 ) includes a magnet ( 10 ) that generates a main magnetic field (Bo) in...
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7612564 |
Tiled receiver coil array with improved spatial coverage
A phased array for a magnetic resonance (MR) imaging apparatus is disclosed that includes a plurality of receiver coils arranged to form a staggered hexagonal coil array, with the staggered...
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7609064 |
Probe configured for NMR apparatus and NMR apparatus using the same
A probe for a nuclear magnetic resonance apparatus comprises: a transmission coil for irradiating a sample with a high-frequency electromagnetic wave; and a receiving coil for detecting a nuclear...
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7602190 |
External MRI imaging coil assemblies and MRI-guided interventional systems utilizing same
An MRI imaging coil assembly includes a primary external MRI imaging coil and a secondary external MRI imaging coil positioned proximate to the primary MRI imaging coil. The primary imaging coil...
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7602187 |
Integrated power supply for surface coils
A radio frequency receive coil for receiving a magnetic resonance signal includes a radio frequency antenna. The radio frequency antenna includes one or more electrical conductors ( 72, 74, 76, 78,...
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7598739 |
Radio frequency gradient, shim and parallel imaging coil
A plurality of linear current elements are configured about a specimen to be imaged. A current in each current element is controlled independent of a current in other current elements to select a...
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7595641 |
Electronic NMR reference signal systems and methods
According to some embodiments, a synthetic nuclear magnetic resonance (NMR) reference signal is injected into the receive path of an NMR spectrometer, after the NMR probe and before the receive...
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7595640 |
Tomographic measuring system and method for conducting measurements
A tomographic measuring system is disclosed with at least two tomographic measuring devices, of which at least a first can interfere with a second in a manner disadvantageous for conducting...
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7592813 |
Wireless RF coil power supply
A system wirelessly supplies electrical power to an RF coil and an analog-to-digital converter (ADC) for an MRI system. The system supplies power to at least operate the RF coil and ADC without the...
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7592811 |
High-frequency resonant cavity for nuclear magnetic resonance, using radio-frequency transmission lines
A high frequency cavity resonator for nuclear magnetic resonance, including: a set of transmission lines; and a shield surrounding these transmission lines, wherein each of these transmission lines...
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7589531 |
Gradient magnetic field coil unit, gantry for MRI apparatus, and MRI apparatus
A gradient magnetic field coil unit includes a main coil layer that has a main coil for generating a gradient magnetic field and is formed in a substantially cylindrical shape. A shield coil layer...
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7589530 |
Coil device and nuclear magnetic resonance imaging apparatus using the same
An RF coil which is resonant and tuned with two different frequencies, has uniform space sensitivity and occupies less space is provided. The coil is, particularly suited to the high magnetic field...
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7583084 |
Arrangement for signal conversion
In an arrangement for conversion of an analog acquisition signal of an acquisition coil of a magnetic resonance apparatus into a digital signal, the output of the acquisition coil is connected with...
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7579836 |
Multi-layer resonator for magnetic resonance applications with the resonator structure itself allowing equal magnitude current during active operation
A resonator for magnetic resonance applications has a conductor element proceeding in an extension direction, that operates with a resonance current at a resonance frequency oscillating therein in...
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7579835 |
Multi-layer resonator for magnetic resonance applications with circuitry allowing equal magnitude current during active operation
A resonator for magnetic resonance applications has a conductor element that extends from a first conductor end to a second conductor end. During operation of the conductor element at a resonance...
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7579832 |
Cross-drive impedance measurement circuits for sensing audio loads on CODEC channels
An audio system includes a CODEC audio jack having left and right audio ports and a jack sense circuit. The jack sense circuit includes left and right amplifiers and a cross-drive impedance sensing...
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7576542 |
System and apparatus for providing electrical and cooling interconnections in a magnetic resonance imaging (MRI) system
A coil assembly and a magnetic resonance imaging system employing same are disclosed. The coil assembly includes a main gradient coil assembly having a first section positioned at a first end of...
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7576541 |
RF coil for MRI apparatus, method of using RF coil for MRI apparatus, and MRI apparatus
A RF coil according to the invention is made up of an 8-shaped coil having a crossed conductive path, and an impedance adjustment coil that performs connection between crossing points of the...
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7573432 |
MRI antenna
In one example, an antenna is disclosed comprising a first, outer conductor, at least one inner conductor within the first outer conductor, and a second outer conductor surrounding the first outer...
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7570059 |
Double resonance coil arrangement for a magnetic resonance device
A double resonance coil arrangement for a magnetic resonance device has at least two coils, each having a coil conductor, in which at least one first capacitor, as well as at least one inductor...
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7570058 |
System and method for treatment of liquid coolant in an MRI system
A system and method for the monitoring and treating of a coolant in a cooling system of an MRI system includes a deionization kit connectable to the cooling system of the MRI system. The...
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7570057 |
NMR spectrometer
An object of the present invention is to solve the bending of an NMR probe and a room temperature shim coil so that they can be positioned easily. In the NMR spectrometer including split-pair...
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7560934 |
MRI coil element decoupling utilizing multiple feeds
An MRI system includes a receive coil having a coil element. Two preamplifiers are used in relation to the coil element, thus placing a large impedance in series with the coil element. The optimal...
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7560933 |
MRI apparatus and RF pulse generating circuit
An MRI apparatus includes: an RF coil to which analog RF pulse signals are applied; an RF pulse generating circuit which generates said analog RF pulse signals; and a magnetic resonance signal...
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7560932 |
Nuclear magnetic resonance (NMR) probe
There is provided a nuclear magnetic resonance probe in which the loss caused by a high frequency cable between a probe coil and a preamplifier is reduced and the sensitivity of an NMR signal is...
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7560931 |
Switching device compatible with RF coil and magnetic resonance imaging system
With the objective of providing a switching apparatus capable of reducing a geometrical size while a radiation loss is being suppressed, the switching apparatus that switches a state of an RF coil...
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7560930 |
Magnetic resonance imaging apparatus for scanning the spine
The present invention discloses a magnetic resonance imaging apparatus for scanning a spine, comprising a body coil for emitting signals, a patient table within the body coil and a spine coil for...
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7560929 |
Ferromagnetic frame magnet with superconducting coils
A magnetic resonance imaging magnet includes a ferromagnetic frame. A pair of generally toroidal superconducting coil units overlie interfaces of side walls incorporated in the frame. Each coil...
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7558613 |
Spatial encoding MR data of a moving subject using a higher-order gradient field
The present invention includes a technique for use with magnetic resonance imaging that includes the application of a non-linear, higher-order gradient field in the presence of a moving object to...
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7545143 |
Superconductor probe coil for NMR apparatus
A NMR apparatus includes a probe coil of a superconductor coil made of magnesium 2-boride formed on a surface of a substrate, and a coil bobbin around which the superconductor coil is wound. The...
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7541810 |
RF coil and magnetic resonance imaging apparatus
For the purpose of making available an RF coil which makes possible a reduction in elements to be controlled in varying the size of the RF coil, there are provided an original loop unit, a...
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7538554 |
Circuit arrangement for detuning a resonant circuit of an MR apparatus
An MR apparatus has a resonant circuit, which is formed by an MR receiving coil (L 1 ) and a capacitor (C 1 ), and has an electronic control circuit (S) for switching the resonant circuit between...
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7538553 |
Magnetic structure for MRI machines and MRI machine particularly for orthopedic of rheumatologic applications
Magnetic structure for MRI machines, which machine has a U-shaped or annular, that is O-shaped geometry having two opposite poles between which a magnetic field is generated and are borne at a...
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7538552 |
Orthogonal coil for magnetic resonance imaging
A radio frequency coil assembly ( 32 ) for magnetic resonance imaging includes a coil array portion ( 60, 60′, 88 ) and a TEM coil portion ( 62, 62′ ). The coil array portion includes a...
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7535230 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a applying unit which applies a gradient magnetic field and a radio-frequency pulse to a subject placed in a static magnetic field, a radio-frequency...
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7534208 |
Device for the measurement of glucose concentrations
The device of the present invention comprises a ring ( 1 ) of a ferrite material and two coils ( 4, 5 ) wound around it. A alternating current is fed to one of the coils ( 4 ). This current gives...
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7529575 |
Nuclear magnetic resonance imaging device
A nuclear magnetic resonance imaging device has a magnetic structure which defines a cavity for housing at least part of the body of a patient with a magnetic field which permeates at least part of...
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7528603 |
Magnetic attraction preventive system
A magnetic attraction preventive system includes an approach detection unit which generates an approach detection magnetic field and detects the approach of a magnetic material to a magnetic...
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7522952 |
Combined positron emission tomography and magnetic resonance tomography unit
A combined PET/MRI tomography unit has a PET unit with a unit part assigned to the examination space, and a first evaluation unit for evaluating the PET electric signals. The unit part has a gamma...
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7521932 |
Method and system for adjusting the fundamental symmetric mode of coupled high temperature superconductor coils
The frequency of the fundamental symmetric mode of two or more coupled essentially identical high temperature superconductor coils can be tuned, with little degradation in Q, by mechanically...
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7518541 |
Magnetic resonance imaging apparatus and A-D conversion device
With the aim of reducing noise due to a digital signal in an A-D conversion unit, the following is implemented: an input unit is provided with four A-D converters and a gray code conversion unit....
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7518373 |
Magnetic resonance system with reception antenna device
A magnetic resonance system that has a magnet system that generates magnetic fields in an excitation region, allowing nuclei in an examination subject in the excitation region to be excited to emit...
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7518372 |
MRI RF coil arrangement with solder joint reinforcement of discrete components
A transmitting or receiving coil assembly for nuclear spin tomographs comprises a multi-layer structure of conducting layers forming inductive components on an insulating support layer. Discrete...
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7518368 |
Device and method for optical transmission of magnetic resonance signals in magnetic resonance systems
In a transmission device for use in magnetic resonance systems for transmitting magnetic resonance signals from a number of local coils to an evaluation device, the signals are transmitted as...
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7511498 |
Magnetic resonance imaging apparatus and RF coil
A magnetic resonance imaging apparatus capable of receiving magnetic resonance signals with a plurality of coils while uniformly exciting such signals is to be provided. An RF coil of the magnetic...
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7511497 |
Superconducting array of surface MRI probes
An array of resonators for use in MRI and NMR is disclosed where the resonators are solid state constructs including a pair of resonating elements formed on both sides of a dielectric substrate and...
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7508214 |
Transmit-mode phased array coils for reduced SAR and artifact issues
Systems and methods for the selection of and application of RF power to a plurality of transmit and/or transmit/receive coil elements to decrease patient SAR and to limit the potential for artifact...
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7508213 |
Integrated optical link for MR system
A system and method for optical data transmission between MR scanning equipment and a data processing unit includes a silicon-based optical modulator which receives MR signals from RF coils and...
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