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| Number | Title | Issue Date |
| 8179137 | Magnetic resonance compatible multichannel stripline balun Systems and devices for transmitting radio frequency signals to and from radio frequency coils in magnetic resonance imaging systems are provided. In one embodiment, a balun for blocking induced radio frequency current on ground conductors of a multi-layer signal ca... | 05/15/2012 |
| 8169221 | Multi-frequency excitation coils for MRI Devices, systems, methods, and other embodiments associated with magnetic resonance imaging (MRI) are described. In one embodiment, an apparatus includes an RF coil for use in multi-nuclear excitation in magnetic resonance imaging (MRI). The RF coil includes a set o... | 05/01/2012 |
| 8143896 | Microcoil magnetic resonance detectors The present invention provides microcoil magnetic resonance based modules, detection devices, and methods for their use. In certain embodiments, the invention provides a module including a microcoil possessing an inner diameter of between 25 microns and 550 microns,... | 03/27/2012 |
| 8138762 | Coil decoupling for an RF coil array An MRI phase RF coil array includes a plurality of separate RF coil elements where each coil element has a pre-amplifier circuit with a conditioning circuit in advance of the transistor including an inductor and capacitors connected across the input of preamplifier.... | 03/20/2012 |
| 8125227 | Controlling method for capacitive sensors A controlling method for capacitive sensors in a vibrating mirror motor system includes a capacitive sensor, a subtraction circuit and an adder circuit connected to the capacitive sensor, a high frequency power supply providing power for the capacitive sensor, a D/A... | 02/28/2012 |
| 8115488 | Tuning low-inductance coils at low frequencies A method and apparatus for tuning and matching extremely small sample coils with very low inductance for use in magnetic resonance experiments conducted at low frequencies. A circuit is disclosed that is appropriate for performing measurements in fields where magnet... | 02/14/2012 |
| 8106658 | Identification code circuit for receiving coil in magnetic resonance imaging system An identification code circuit for a receiving coil in a magnetic resonance imaging system, is embodied in a main coil. The circuit has a fixed resistance for generating the identification code of the main coil. The main coil has a socket for connecting a sub-coil, ... | 01/31/2012 |
| 8093900 | Ultra wide band wireless radio transmission in MRI systems involving channel estimation At least one radio frequency coil (28, 30) is disposed within an examination region (14), the radio frequency coil (28, 30) wirelessly receives a spread spectrum calibration signal from and transmits multiple channels of data in spread spectrum ... | 01/10/2012 |
| 8049504 | Simple decoupling of a multi-element RF coil, enabling also detuning and matching functionality A coil (36) includes coil elements (381, 382, . . . , 38n). The coil (36) can transmit radio frequency excitation pulses into an examination region (14) and/or receive responsive radio freque... | 11/01/2011 |
| 8049505 | MRI system with direct digital receiver using resampling The present invention relates to magnetic resonance imaging system and to a direct digital receiver (18) for an RF coil (D1, D2), in particular of a magnetic resonance imaging system. To obtain that the sampling frequency of an analog-to... | 11/01/2011 |
| 8035389 | RF switch device, magnetic resonance imaging system and an RF signal transmission method A radio frequency (RF) switch device has at least two RF switch units, each RF switch unit having an output terminal and at least two input terminals. The RF switch units select one channel of RF signals from several channels of the RF signals that are supplied as i... | 10/11/2011 |
| 8030931 | Wireless magnetic resonance imaging upconversion stage with a paramagnetic amplifier and delay line converting RF signals to microwave signals An upconversion stage for a wireless magnetic resonance imaging system local coil array has a number of upconversion circuits. Each upconversion circuit includes a parametric amplifier, an antenna and a delay line between the amplifier and the antenna. The path leng... | 10/04/2011 |
| 8030932 | Bandwidth expansion in magnetic resonance An apparatus for use in a magnetic resonance examination includes a radio frequency receive coil (50) and adjustable tuning circuitry (51) for adjusting the resonant frequency of the receive coil. The apparatus also includes a preamplifier (29) ... | 10/04/2011 |
| 8030930 | Magnetic resonance imaging local coil composed of separate parts A separated coil for a magnetic resonance imaging system has a first partial coil in a first partial casing and a second partial coil in a second partial casing, the first and second partial coils being connected to a connector for connection to the imaging system v... | 10/04/2011 |
| 8013609 | Detuning circuit and detuning method for an MRI system The present invention relates to a magnetic resonance imaging system and a corresponding method having a transmit phase and a receive phase. Further, the present invention relates to a detuning circuit and a corresponding detuning method for detuning an RF receive c... | 09/06/2011 |
| 7999549 | Transmission path for use in RF fields providing reduced RF heating A transmission path (2) comprising an electrically conductive link or connection lead or line or cable (21) is disclosed, which path is or can be made RF safe (especially with respect to heating due to standing waves) when guided through RF electrical ... | 08/16/2011 |
| 7990149 | MR involving high speed coil mode switching between I-channel linear, Q-channel linear, quadrature and anti-quadrature modes Hybrid circuitry (40, 40′, 40″) for operatively coupling a radio frequency drive signal (70) with a quadrature coil (30) is configurable in one of at least two coil modes of a group consisting of: (i) a linear I channel mode in which an I ch... | 08/02/2011 |
| 7940046 | Magnetic resonance apparatus with structurally separate RF transmit and RF reception devices A magnetic resonance system has a first installation unit, in which a control processor device is arranged, as well as a radio-frequency coil arrangement for transmitting and receiving magnetic resonance signals. The radio-frequency coil arrangement is controlled or... | 05/10/2011 |
| 7940047 | Microcontroller system for identifying RF coils in the bore of a magnetic resonance imaging system A method and apparatus for identifying local RF coils in a MR system includes a microcontroller that is provided in the bore of the system. The microprocessor determines when local RF coils are connected, identifies the coils, and provides the information to an MR s... | 05/10/2011 |
| 7936171 | Baluns, a fine balance and impedance adjustment module, a multi-layer transmission line, and transmission line NMR probes using same A pseudo-Marchand balun, compound balun and tunable multi-resonant coaxial balun, and NMR probes employing each such balun, and a fine balance and impedance adjustment module and a multi-layer transmission line for use in such NMR probes. ... | 05/03/2011 |
| 7884609 | High frequency coil and magnetic resonance imaging apparatus To provide an RF coil of an MRI apparatus and improve the irradiation efficiency and the reception sensitivity of a circular polarized magnetic field with a simple structure. An RF coil has a set of input/output terminals and two loops. The two loops are disp... | 02/08/2011 |
| 7876101 | Active radio frequency coil providing negative resistance for high field magnetic resonance imaging As the static magnetic field used in Magnetic Resonance Imaging (“MRI”) instruments increases the resonance frequency also increases. Consequently, the signal lost due to the coil becomes an issue. To compensate for this loss, it is possible to use an active dev... | 01/25/2011 |
| 7872476 | NMR probe An NMR probe is offered which enables a 1H/19F compatibility mode having a sample coil, a hollow tubular body, and two rod electrodes disposed inside the tubular body substantially in a parallel relationship to each other. The tubular body is f... | 01/18/2011 |
| 7855559 | Circuit and apparatus for decoupling RF surface coils A decoupling circuit for a radio frequency (RF) surface coil having a plurality of tuning capacitors includes at least two decoupling points and a DC source coupled to the at least two decoupling points. Each decoupling point is associated with one of the plurality ... | 12/21/2010 |
| 7852086 | Arrangement to correct eddy currents in a gradient coil In an arrangement to correct eddy currents in a gradient coil of a magnetic resonance apparatus, the gradient coil having a primary gradient sub-coil and a secondary gradient sub-coil connected in series with the primary gradient sub-coil, the secondary gradient sub... | 12/14/2010 |
| 7791344 | Magnetic resonance RF transmission system and MR system and method using same A radio-frequency transmission system for a magnetic resonance system has a radio-frequency amplifier and a signal splitter with two inputs and two outputs. The signal splitter is fashioned so that the power of a radio-frequency signal provided at one of the two inp... | 09/07/2010 |
| 7791343 | Superconductor with enhanced high magnetic field properties, manufacturing method thereof, and MRI apparatus comprising the same A superconductor exemplarily described herein includes a superconducting material containing magnetic impurities and non-magnetic disorders formed in the superconducting material. The superconductor described herein is suitable for use in magnet applications and pow... | 09/07/2010 |
| 7782059 | Bandwidth expansion in magnetic resonance A magnetic resonance imaging system includes a primary magnet and a secondary magnet operable to produce magnetic fields within a sample being imaged. The MRI system further includes at least one RF coil that is operable to receive electromagnetic frequencies from t... | 08/24/2010 |
| 7777492 | Magnetic resonance compatible device and a method of conducting a high frequency power signal between regions of the device The arrangement (10) is suited for transmitting an informative signal (S1), generated by suitable signal generator (1) at a first electrical site (7a) to a second electrical site (7b). The first electrical site (7 | 08/17/2010 |
| 7777493 | Method for adjusting an excitation and detection circuit for nuclear magnetic resonance, and circuit adapted for carrying out said method A method of adjusting an excitation and detection circuit for nuclear magnetic resonance, the circuit comprising a probe (S) of the type comprising a single coil (L) for transmitting pulses to excite the nuclear spins of a sample immersed in a magnetic field and for... | 08/17/2010 |
| 7777494 | Arrangement for receiving and/or transmitting RF signals especially in a MRI system An arrangement for receiving and/or transmitting RF signals and for feeding the same in a digital format between at least one RF antenna, coil and/or sensor unit (A, B) and a signal processing unit (8), by means of at least one digital cable (121, . . . 12... | 08/17/2010 |
| 7750637 | Transmission line for use in RF fields An electrically conductive link (connection lead) or transmission line (13) including at least one transformer (41, 42; 83) for coupling at least two lead segments (51, 52; 81, 82) of the line (13) and for providing safety of the line whe... | 07/06/2010 |
| 7733091 | Probe, system and method suitable for unilateral nuclear magnetic resonance A probe suitable for use in unilateral nuclear magnetic resonance imaging and adapted to be embedded in a sample to be analysed, the probe comprising; a static magnetic field generator; a radiofrequency magnetic field generator adjacent to the static magnetic field ... | 06/08/2010 |
| 7733092 | Magnetic field coil and magnetic resonance imaging apparatus Provided is an RF coil which can highly efficiently and uniformly irradiate a RF magnetic field having two or more magnetic resonance frequencies close to each other, and receive magnetic resonance signals of two or more magnetic resonance frequencies close to each ... | 06/08/2010 |
| 7728594 | Magnetic resonance imaging system provided with an electrical accessory device A magnetic resonance imaging system is provided with one or more electrical accessory devices, for example, catheters (10) or RF surface coils (6), which are intended for use during the examination of an object, as well as with a connection lead (13... | 06/01/2010 |
| 7723988 | Passively damped magnetic resonance (MR) detection configuration A magnetic resonance (MR) detection configuration comprising at least one RF resonant circuit with an inductance, a preamplifier module and an RF receiver, wherein a reactive transformation circuit is connected between a high-impedance point of the inductance and a ... | 05/25/2010 |
| 7719281 | Method to control a magnetic resonance system with individually controllable RF transmission channels In a method for controlling a magnetic resonance system having a radio-frequency antenna structure and a number of individually controllable transmission channels, respective parallel radio-frequency signals are emitted via the transmission channels for generation o... | 05/18/2010 |
| 7719280 | Detection of resonant tags by ultra-wideband (UWB) radar A detection system having a receiver for detecting a material having a magnetic resonance response to illumination by pulses of ultra-wideband (UWB) electromagnetic radiation is disclosed. The receiver comprises a detector for detecting the pulses after they have in... | 05/18/2010 |
| 7714581 | RF coil assembly for magnetic resonance imaging and spectroscopy systems An RF coil assembly for an MRI system includes a resonator formed by a cylindrical shield and pairs of opposing conductive legs disposed symmetrically around a central axis and extending the axial length of the shield. Drive circuitry for each pair of opposing condu... | 05/11/2010 |
| 7714582 | Connection device for connecting electronics of a head coil arranged on a patient support to a connector location provided on the patient support A connection device is provided for connecting electronics of a head coil arranged on a patient support to a connector location provided on the patient support, the head coil being insertable into a PET detector arranged in a magnetic resonance instrument so that si... | 05/11/2010 |
