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...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8441260 | Transmit-receive switching circuit for NMR spectrometer and NMR spectrometer incorporating same A transmit-receive switching circuit is offered which is for use in an NMR spectrometer that employs a solid-state NMR probe using a cooled detection coil. The switching circuit is cryogenically cooled to reduce thermal noise in use. The switching circuit has a firs... | 05/14/2013 |
| 8436617 | Compensation device to reduce the electromagnetic field load due to a medical intervention apparatus in magnetic resonance examinations A compensation device to reduce the electromagnetic field load due to the presence of a medical intervention apparatus in magnetic resonance examinations, has: a control device that has a radio-frequency input and a radio-frequency output, an injection device that i... | 05/07/2013 |
| 8415953 | Upconverter A hybrid upconverter has a low noise amplifier and a two port parametric amplifier. The parametric amplifier has a first port to receive an input signal to be amplified and upconverted and a second port to receive a local oscillator signal and to output the amplifie... | 04/09/2013 |
| 8400153 | Moulded cable traps An overmoulded cable trap (302) for improved performance of an RF trap (102) is disclosed, wherein the RF trap (102) is placed on a section of an electrical cable (104) and fixed in position by overmoulding a thermoplastic material over b... | 03/19/2013 |
| 8390293 | 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 vortex pinning centers and non-magnetic disorders formed in the superconducting material. The superconductor described herein is suitable for use in magnet applications and ... | 03/05/2013 |
| 8390292 | Method and arrangement to transmit magnetic resonance signals In a method and an arrangement for magnetic resonance signal transmission, a first channel of a local coil arrangement has a first individual antenna that receives a first magnetic resonance signal, and a first frequency converter connected with the first individual... | 03/05/2013 |
| 8384388 | Magnetic resonance acquisition system, receiver antenna module, transmission signal reception module, magnetic resonance system and method to transfer MR response signals A magnetic resonance receiver system has an antenna arrangement with a number of receiver antenna elements to receive MR response signals. The magnetic resonance system has a combination network arrangement with a number of combination networks in order to combine t... | 02/26/2013 |
| 8373417 | Method and device to detect failure of a magnetic resonance gradient coil by monitoring a supply cable thereof Efficient gradient cable monitoring is enabled by a device and a method to determine a failure in at least one gradient coil of a magnetic resonance tomography system with gradient cables supplying current thereto, wherein the difference of at least one electrical c... | 02/12/2013 |
| 8358133 | MRI body coil connected to a frangible retention frame circuit board assembly and method for attaching an electronic module to a body coil of a magnetic resonance apparatus Efficient mounting of a module to a whole-body coil of a magnetic resonance apparatus is enabled by a circuit board with conductive contact regions located at least in the area of an edge of the circuit board, with which contact regions contacts of an electronic mod... | 01/22/2013 |
| 8350569 | Device and method for switching a pin diode A circuit for switching a PIN diode has a PIN diode and an inductor (in particular a coil) as well as a direct voltage source and a group of switches, wherein in a first switch setting of the group of switches the PIN diode can be fed with current from the direct vo... | 01/08/2013 |
| 8324901 | Upconverter An upconverter has a low noise amplifier, a two port mixer and an antenna. The two port mixer comprises a first port to receive from the low noise amplifier an amplified input signal to be upconverted and a second port to receive a local oscillator signal and to out... | 12/04/2012 |
| 8324900 | Magnetic resonance integrated-circuit low-noise amplifier It is proposed herein to improve the specifications of a low-noise amplifier (LNA) by integrating it in a chip. In order to cover a range of operating frequencies using a single chip, the integrated-circuit amplifier proposed herein comprises an input port configure... | 12/04/2012 |
| 8319516 | Circuit for testing inrush current A circuit is configured for testing an inrush current of a power supply. The circuit includes a capacitor module, a voltage meter, a semiconductor switch, and a current meter. The capacitor module is connected to an power source for storing electric charge. The volt... | 11/27/2012 |
| 8305080 | Power supply for magnetic resonance imaging system In one embodiment, a power supply for a static tap changer transformer is provided. The power supply comprises a rectifier section configured to supply input voltage, a latch circuit section coupled to the rectifier section and a tap changing section comprising thre... | 11/06/2012 |
| 8283927 | Amplifier A two port parametric amplifier has a first port that receives an input signal to be amplified and upconverted and a second port that receives a local oscillator signal. The amplified upconverted input signal is emitted as an output at upper and lower sideband frequ... | 10/09/2012 |
| 8278927 | System and method for controlling current in gradient coil of magnetic resonance imaging system In one embodiment, a multilevel inverter for generating an AC output voltage, having at least seven potential levels, from a DC voltage source such that the generated AC voltage produces a current in a gradient coil of a magnetic resonance imaging system is provided... | 10/02/2012 |
| 8248073 | Semiconductor integrated circuit and testing method therefor A semiconductor integrated circuit comprises a plurality of cores (99) connected with an inter-connection network (1000) and a test controller (500) which is connected with the inter-connection network (1000) and which issues a test contr... | 08/21/2012 |
| 8228065 | Transmission line for use in magnetic resonance system An electrically conductive transmission cable for supplying a DC signal safely to an electrical device in the presence of radio-frequency (RF) fields in a magnetic resonance (MR) is disclosed herein. The transmission cable comprises a transmission line (STL) compris... | 07/24/2012 |
| 8217657 | Diplex filter and method to filter signals A diplex filter is formed by two impedance-transforming filters with separate transmission frequency ranges and with separate cut-off frequency ranges and a connection node at which two series elements of the two filters are connected. These two series elements are ... | 07/10/2012 |
| 8217656 | Motion compensation in magnetic resonance imaging In a method of compensating for the effects of motion of an image subject during magnetic resonance imaging using phase encoding in a magnetic resonance imaging system having a number of wireless local coils and a wireless microwave transceiver array, one or more ph... | 07/10/2012 |
| 8207736 | Apparatus for feeding a magnetic resonance coil element and method of making same A method, system, and apparatus including a magnetic resonance (MR) coil system that includes an MR coil element, a high input Pre-amplifier having a high input impedance field-effect-transistor (FET) with an impedance of one of substantially equal to 500 ohms and g... | 06/26/2012 |
| 8207737 | Standing wave barrier for a magnetic resonance tomography device A standing wave barrier, particularly for use in a magnetic resonance tomography device, has a body and an opening in the body that is fashioned to accommodate a cable, the opening being formed as an externally open groove along a longitudinal direction of the stand... | 06/26/2012 |
| 8207735 | Method and apparatus for tuning and matching MRI/NMR probe A method and apparatus for tuning the frequency and matching the impedance of an RF coil, or probe, used for nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI) are provided. In NMR/MRI, the RF coils used to acquire the data are tuned and impedance mat... | 06/26/2012 |
| 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 |
