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7183770 |
High-frequency system for an MR apparatus with multiple transmit channels
The invention relates to a high-frequency system for an MR apparatus with a high-frequency coil arrangement comprising a plurality of resonator elements ( 104 ), which is connected to a transmit...
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7180296 |
Magnetic resonance imaging receive circuit
A magnetic resonance imaging receive circuit, for use e.g. within the body of a patient during an MR imaging procedure, includes a balanced MR coil ( 50 ) connected to balanced matching and...
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7180291 |
Degenerate birdcage coil and transmit/receive apparatus and method for same
A birdcage coil ( 16 ) used in conjunction with a magnetic resonance imaging apparatus includes a first conductive loop ( 81, 581 ), a second conductive loop ( 82, 582 ), and a plurality of first...
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7176688 |
RF coil and MRI apparatus
An RF coil includes a plurality of concentric loops lying at different positions along a coil axis, whose sensitivity is improved in a central portion, and a plurality of loops are constructed as...
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7173421 |
Nuclear spin resonance clock arrangements
Nuclear spin resonance (NSR) clock arrangements.
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7173422 |
Generator for generating time-variable magnetic fields and magnetic resonance device
In one aspect, a generator for generating time-variable magnetic fields is provided. The generator includes a gradient coil having conductors extending in an area defined by a hollow first...
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7173423 |
System and methods for testing operation of a radio frequency device
A system and a method for testing a Radio Frequency (RF) device are provided. The system includes a light emitting source configured to transmit an optical test signal based on an RF signal and a...
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7173426 |
Optical link for transmitting data through air from a plurality of receiver coils in a magnetic resonance imaging system
An optical data link is provided for optically transmitting in free space data from a plurality of receiver coils in a magnetic resonance (MR) imaging system. This free space (e.g.,...
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7173427 |
Magnetic resonance imaging apparatus and magnetic resonance imaging method
A magnetic resonance imaging apparatus includes a plurality of coils which receive magnetic resonance signals, a plurality of A/D converters which digitize the magnetic resonance signals, and a set...
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7170293 |
Circuit arrangement for transferring signals form local MR coils to evaluation units
A circuit arrangement for connection of at least two local coils of a magnetic resonance apparatus with at least two evaluation units has at least two sheath wave barriers arranged so that magnetic...
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7167001 |
Installation for investigating objects using magnetic resonance
An installation for the investigation of objects by means of magnetic resonance has a magnet system for the production of a homogenous magnetic field in an investigational volume and is...
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7161511 |
Linearization system and method
A system for training a linearization compensation model includes a tone generator for providing at least two different RF tones, receiver path components for processing the RF tones, an...
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7161353 |
Magnetic resonance tomograph with an insertable gradient coil and a bundled detachably coupled water and electrical supply line
The present invention relates to a nuclear spin tomography device comprising a basic field magnet, a whole body gradient coil system with an HF antenna ( 1 ) surrounded by a suspension tube ( 2 )...
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7151373 |
Antenna arrangement for acquisition of a magnetic resonance signal
An antenna arrangement for acquisition of a magnetic resonance signal has at least two acquisition antennas, each having at least one conductor loop and each conductor loop having an interruption...
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7151372 |
Method and means of multi-activation of ions and atoms with nmr and epr
The invention uses one inductor, which is formed of one, two or a few twisted or parallel conductors, and exposes a sample object in a pulsed and damped alternating magnetic field (B) without...
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7145338 |
Method for implementation of a magnetic resonance examination of a patient
In a method for implementation of a magnetic resonance examination of a patient with an imaging medical magnetic resonance apparatus with a movable patient bed, for of an examination volume of the...
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7145339 |
Method and apparatus for discrete shielding of volume RFcoil arrays
The subject invention pertains to a technique and device that can isolate and separate resultant electromagnetic fields of volume coils at high frequency. In an embodiment, an RF shield can be used...
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7145337 |
Coil arrangements
Apparatus ( 10 ) for use in MRIS includes a coil arrangement having drive coils ( 20 ), shield coils ( 30 ) and a power supply unit (PSU) ( 40 ). The drive coils ( 20 ) and the shield coils ( 30 )...
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7141980 |
Apparatuses for enabling operation of adjacent coil loops with a magnetic resonance system
An apparatus for enabling operation of adjacent coil loops with a magnetic resonance system. The apparatus includes a correction network interconnecting the coil loops for enabling both concurrent...
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7141979 |
Cryo head with a plurality of heat exchangers for cooling the RF coils or resonators
A cryohead ( 1 ) for nuclear magnetic resonance (NMR) measurements, comprising at least one detection channel for receiving NMR signals and at least one transmitting and decoupling channel, wherein...
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7141975 |
Nuclear magnetic resonance system
An NMR system that enables multiplex resonance measurement includes a superconductivity reception coil, a transmission coil, and four electric current loops. The NMR system also includes an...
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7141976 |
Method and control device for determining the position of a local coil on a patient table of a magnetic resonance scanner
In a method and control device for determining the position in at least one spatial direction of a local coil on a patient table in a scanner of a magnetic resonance tomography apparatus, a...
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7138801 |
NMR spectrometer and NMR probe
An NMR probe having a high-sensitivity solenoid probe coil for receiving free induction decay (FID) signals in nuclear magnetic resonance (NMR) spectroscopy, and an NMR spectrometer which...
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7138802 |
Nuclear magnetic resonance apparatus probe
A nuclear magnetic resonance apparatus comprises a superconducting magnet that produces a static magnetic field, a probe having a probe coil that irradiates an RF pulse magnetic field and receives...
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7135864 |
System and method of elliptically driving an MRI Coil
An RF coil apparatus for generating an elliptical polarization field includes an RF coil assembly having a pair of independent drive channels connected thereto. The drive channels are driven such...
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7135866 |
Multifrequency power circuit and probe and NMR spectrometer comprising such a circuit
A multifrequency power circuit of an NMR coil, includes two power or transmission line segments called principal line segments, each including a segment of a conductor that is attached to the coil,...
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7133713 |
Integrated multi-rail imaging system
The imaging system can comprise a plurality of elongated rails, a scanhead assembly, and a small animal mount assembly. The scanhead assembly is selectively mounted onto a first rail and is...
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7132829 |
NMR RF coils with improved low-frequency efficiency
According to one aspect, the low-frequency (e.g. lock channel) performance of a nuclear magnetic resonance (NMR) saddle-shaped, distributed-capacitance radio-frequency (RF) coil is improved by...
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7132830 |
Radiofrequency wave transmission circuit using arbitrary waveform generator and NMR apparatus using the same
An NMR apparatus has a circuit adapted to improve the degree freedom of design and generate an excitation radiofrequency wave pulse suited for a sample to be measured. The radiofrequency wave...
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7126337 |
Reception unit for a magnetic resonance tomography apparatus
A reception unit for a magnetic resonance tomography apparatus has an RF preamplifier connected at its signal input to a local coil with a PIN diode connected in parallel with the signal input and...
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7126336 |
Nuclear magnetic resonance apparatus having a controllable detector
In an NMR apparatus having an analog-to-digital converter for converting the voltage signal V(t) to a digital signal, a reference signal generator for generating reference waves which are digital...
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7123011 |
Method of producing an MRI image with gradient delay compensation
Gradient pulses are generated by current conducting gradient coils. High-frequency components cause the center of gravity of the current to be shifted by mutual influencing of the coil conductors....
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7123015 |
Magnetic resonance system and method
A magnetic resonance (MR) system and method for generating information about an object is provided. The MR system comprises at least one MR detector configured to sense a plurality of...
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7119543 |
Generator device for generating a magnetic resonance excitation signal
A generator device for a magnetic resonance excitation signal has a signal divider that divides an input signal supplied to it via an input element into at least two sub-signals and supplies them...
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7119541 |
Multiply-tuned volume resonator for magnetic resonance imaging and spectroscopy
A multiply-tuned volume resonator comprises a generally cylindrical birdcage comprising a pair of end rings and generally parallel column elements bridging the end rings at generally equal...
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7109715 |
Generator of time-variable magnetic fields of a magnetic resonance device and magnetic resonance device
A generator of time-variable magnetic fields of a magnetic resonance device having an examination space for registering at least one area to be examined of an item being examined has the following...
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7109714 |
Q-factor switching method and apparatus for detecting nuclear quadrupole and nuclear magnetic resonance signals
A probe ( 80 ) for irradiating a sample with RF energy during transmitting periods and detecting an NQR or NMR signal from a substance contained within the sample during receiving periods. The...
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7109710 |
Method and apparatus to improve signal-to-noise ratio without compromising field-of-view for simultaneous MR data acquisition by an array of RF coils of an MR scanner
A method and apparatus is disclosed to analogically combine MR signals from RF coils to form multiple sets of analogically combined MR signals, and then digitally combine the analogically combined...
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7106061 |
Probe head for nuclear magnetic resonance measurements
A probe head for nuclear magnetic resonance measurements is disclosed in which at least a first kind of nuclei with a first, higher resonance frequency and a second kind of nuclei with a second,...
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7106064 |
Method and apparatus for quadrature detection and MRI system
A method of eliminating unnecessary frequency components using a quadrature detector. The method includes converting an analog input signal into a digital signal f 1 (t), and the signal f 1 (t) is...
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7098661 |
Magnetic resonance device with a high frequency shield having a high frequency short circuit to the circuits boundary surface of the basic field magnet
A magnetic resonance device with a cavity and with a basic field magnet and a gradient coil system, with the basic field magnet having a cavity that is bounded by an electrically conductive...
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7099808 |
Capacitance and transmission line measurements for an integrated circuit
A method and apparatus for determining capacitance of wires in an integrated circuit is described. The capacitance information derived according to the invention can be used, for example, to...
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7096056 |
Functional magnetic resonance imaging using steady state free precession
A method for functional magnetic resonance imaging (fMRI) uses steady-state free precession (SSFP) to image changes in blood oxygenation between two time periods. A center frequency of the SSFP...
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7095230 |
NMR probe for material analysis
In a unilateral NMR probe for the analysis of a material comprising at least one magnet for generating a constant time-invariant polarization field B 0 in the material to be analyzed and current...
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7091721 |
Phased array local coil for MRI imaging having non-overlapping regions of sensitivity
A capacitor decoupling network allows the production of a multi-loop local coil for magnetic resonance imaging without overlap of the loops and/or with decoupling between both adjacent and...
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7088104 |
MRI tunable antenna and system
A strip array antenna including a number of conductors ( 14 ) that are connected to ground or virtual ground though at least one reactive component ( 150 ). The apparent electrical length of...
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7084635 |
Probe for NMR apparatus using magnesium diboride
To provide a probe coil for an NMR apparatus which can transmit and receive high frequency radio waves with improved Q-factor and S/N ratio. As a measure, the probe coil for an NMR apparatus is...
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7084629 |
Parallel imaging compatible birdcage resonator
A birdcage coil for use with a magnetic resonance (MR) system comprises a first ring at one thereof, a second ring at the other end thereof, and a plurality of rods electrically interconnecting the...
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7081753 |
Multiple tuned scroll coil
A sample probe and apparatus are provided for magnetic resonance experiments. The probe includes a coil simultaneously tunable to at least two different frequencies. The coil includes a section...
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7068035 |
Magnetic resonance apparatus with a detunable RF resonator
A magnetic resonance apparatus with a radio-frequency shield at a reference potential, a detuning circuit and an electrical line which is connected with the detuning circuit. The electrical line is...
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