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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 8169219 | Slice selective MRI excitation with reduced power deposition using multiple transmit channels Described are embodiments for slice-selective excitation for MRI that utilize multiple RF transmit coils, each of which are driven with a separate independent current waveform. These embodiments allow slice-selective excitation with slice profile and excitation time... | 05/01/2012 |
| 8154289 | Method for joint sparsity-enforced k-space trajectory and radiofrequency pulse design A system and method is provided for simultaneously designing a radiofrequency (“RF”) pulse waveform and a magnetic field gradient waveform in a magnetic resonance imaging (“MRI”) system. The method includes determining a desired pattern of RF excitation and ... | 04/10/2012 |
| 8063637 | System and method for phase relaxed RF pulse design Techniques for designing RF pulses may be configured to produce improved magnitude profiles of the resulting magnetization by relaxing the phase constraint and optimizing the phase profiles. In one embodiment, a spinor-based, optimal control, optimal phase technique... | 11/22/2011 |
| 7999545 | Method for obtaining amplitude and phase profiles of RF pulses for spatially selective excitation A method for determining amplitude and phase dependencies of radio frequency pulses that are irradiated during traversal of a defined k-space trajectory to produce a spatial pattern of the transverse magnetization in an MR experiment using at least one RF transmissi... | 08/16/2011 |
| 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 an examination region. A gradient coil (14)... | 11/10/2009 |
| 7557576 | Multi-slice fast magnetic resonance imaging Through advancing the phase of radio frequency (RF) excitation with each phase-encoding level, a method and apparatus increases the effectiveness of a Magnetic Resonance Imaging (MRI) device by correcting for main magnetic field inhomogeneities without noticeably de... | 07/07/2009 |
| 7423429 | Apparatus and associated method that integrate the modalities of diagnosis and therapy to treat, in principle, pathologies generically identified as Cancer and HIV/AIDS Diagnostic and Therapy apparatus and methods use non-ionizing radiations which are based on integration of nuclear magnetic resonance and radiation manipulation. Quantitative diagnostics integrate the following devices: manual control digital filter/selector (18 | 09/09/2008 |
| 7418287 | Magnetic resonance imaging method with accelerated data acquisition A method of dynamic magnetic resonance imaging comprising acquiring undersampled magnetic resonance signals for successive temporal time slots. In a space spanned by geometrical space and temporal frequency and on the basic of a priori information the aliased differ... | 08/26/2008 |
| 7405566 | RF pulse applying method and MRI apparatus The effects of prior pulses are to be enhanced. A pulse string which monotonically decreases the flip angle is inserted between the prior pulse in one round and the imaging pulse in the previous round, and a pulse string which monotonically increases the flip angle ... | 07/29/2008 |
| 7397243 | Magnetic resonance imaging system with a class-E radio frequency amplifier having a feedback circuit A Class-E amplifier has been adapted for use in the radio frequency section that drives a transmit coil of a magnetic resonance imaging (MRI) system. The Class-E amplifier responds to a radio frequency carrier signal and a control signal by producing a radio frequen... | 07/08/2008 |
| 7382128 | Magnetic resonance imaging system with a Class-E radio frequency amplifier A Class-E amplifier has been adapted for use in the radio frequency section of a magnetic resonance imaging (MRI) system. A drive signal is produced by modulating the envelope of a radio frequency carrier signal and then is applied to a switch in the Class-E amplifi... | 06/03/2008 |
| 7372270 | Compensating for non-uniformity of excitation field in MRI A method and system are described for compensating for non-uniformity of excitation field B1+ in magnetic resonance imaging (MRI) of an object. The variation in the RF excitation field B1+ is measured over a region of interest (ROI) in the object, the B1+ field caus... | 05/13/2008 |
| 7372265 | Compensation of magnetic field disturbances due to vibrations in an MRI system A magnetic resonance imaging (MRI) system includes an examination volume (9), a main magnet system (17) for generating a main magnetic field (B0) in the examination volume, a gradient magnet system (25) for generating gradients of the... | 05/13/2008 |
| 7368910 | Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories Measurements of functional, hemographic, and blood flow parameters use a multiple echo or spin echo gradient pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence which avoids saturation effects and a later echo near the end of th... | 05/06/2008 |
| 7366559 | Nuclear magnetic resonance apparatus and method for assessing whole body composition A method is disclosed for measuring whole body composition. The method includes confining movement of the body to a selected volume, inducing a static magnetic field in the volume, inducing a pulsed radio frequency magnetic field in the volume, and receiving nuclear... | 04/29/2008 |
| 7358725 | Correction of NMR artifacts due to axial motion and spin-lattice relaxation NMR spin echo signals are corrected for axial motion of the borehole logging tool. The correction is applied to an averaged echo train using an average velocity determined from surface measurements over the duration of averaging of the echo trains. An additional cor... | 04/15/2008 |
| 7358728 | Magnetic resonance imaging apparatus and magnetic resonance imaging data processing method A magnetic resonance imaging apparatus 20 includes a phase difference calculation unit 44 configured to perform a one-dimensional Fourier transform on complex data not phase-encoded extracted from complex data of a nuclear resonant signal collected by ... | 04/15/2008 |
| 7355404 | System and method of SAR management for an MR scan A method and apparatus for RF deposition prediction model refinement measures an RF parameter during a scan and refines the RF deposition prediction model by a correction factor based on the measured RF parameter. ... | 04/08/2008 |
| 7342398 | Method, device and magnetic resonance tomography system for monitoring emitted RF energy In a method, device and magnetic resonance tomography system for monitoring a radio-frequency apparatus in which radio-frequency pulses are emitted at temporal intervals and in which measurement values representing the power of the radio-frequency pulses are measure... | 03/11/2008 |
| 7340225 | Method for monitoring an RF power amplifier, and an RF device, a monitoring device, and an MR system corresponding thereto In a method for monitoring of a radio frequency power amplifier and a radio frequency device, a radio frequency monitoring device and magnetic resonance tomography system operable according to the method, radio frequency pulses emitted by a radio frequency power amp... | 03/04/2008 |
| 7336074 | Active decoupling of MRI RF transmit coils An MRI RF transmit system uses a plurality of RF transmit coils, each being driven with separately controllable RF magnitude and phase. The magnitude and phase of each coil drive are separately and independently controlled so that the RF transmit coils act as if the... | 02/26/2008 |
| 7336986 | Magnetic resonance imaging apparatus An apparatus includes acquiring means for acquiring echo data of a plurality of views in which a phase difference between water and fat is 2π/m with spins within a subject brought to the SSFP state and repeating the acquisition for k=0 through M−1 with a step dif... | 02/26/2008 |
| 7323871 | Method and system of MR imaging with simultaneous fat suppression and Tinversion recovery contrast A method and system for fat suppression with T1-weighted imaging includes a pulse sequence generally constructed to have a non-spectrally selective IR pulse that is played out immediately before a spectrally selective IR tip-up pulse. Thereafter, a fat su... | 01/29/2008 |
| 7319323 | Device and method using magnetic pattern on disk An embodiment of the invention relates to a device for performing NMR or ESR analysis. The device comprises a detection unit, a magnet, and a disk having a magnetic pattern. The detection unit comprises a sample holding space for holding a sample and a microcoil for... | 01/15/2008 |
| 7319324 | MRI method and apparatus using PPA image reconstruction In a method and apparatus for magnetic resonance imaging based on a partially parallel acquisition (PPA) reconstruction technique, a number of partial k-space data sets are acquired with a number of component coils, the totality of the partial data sets forming a co... | 01/15/2008 |
| 7315767 | Impedance spectroscopy based systems and methods One aspect of the invention provides a device that non-invasively determines the concentration of a substance in a target. The device includes a first electrode, a measuring circuit, and a data processor. In one embodiment of the device, the first electrode can be e... | 01/01/2008 |
| 7301338 | Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis Data from a string of multiple formation evaluation data sensor are evaluated by an expert system. Based on the analysis, the logging speed is increased if all the sensors justify it, and is reduced if any of the sensors require a reduced logging speed. Alternativel... | 11/27/2007 |
| 7292033 | Sensor assembly and method for the detection of substances by nuclear quadrupolar resonance (NQR) and in presence of environmental interference A sensor assembly for the detection of substances by means of nuclear quadrupolar resonance (NQR) and in the presence of environmental interference. The sensor assembly has a transmitter Tx which comprises excitation means which generate excitation signal... | 11/06/2007 |
| 7279901 | Magnetic resonance apparatus and operating method for generating a homogenous RF field in the examination volume In a method and magnetic resonance system for generating a homogenous, radio-frequency excitation field in a spatial examination volume of the magnetic resonance system for a subject examination, the magnetic resonance system having a body coil comprised of N resona... | 10/09/2007 |
| 7268549 | Magnetic resonance spectrometer EPR spectrometer comprising a ferroelectric single crystal resonator, a rectangular channel with holes in its narrow sides for inserting a sample and wires, a permanent magnet with planar poles, and a coil within the channel connected through the holes by the wires ... | 09/11/2007 |
| 7266509 | System and method for combining interactive game with infomercial A combination multi-media interactive game and video infomercial acts as an advertising business method wherein a seller of merchandise can combine both an advertising infomercial with a player and/or participant's playing an interactive game. Preferably, the game i... | 09/04/2007 |
| 7265546 | Method and MR apparatus for PPA MR imaging with radial data acquisition In a method and for MR apparatus PPA imaging with radial data acquisition in magnetic resonance tomography, k-space is under-scanned by acquiring a number of projections φ with a coil array of M component coils, a shift operator C(±nΔk) is determined for a projec... | 09/04/2007 |
| 7256579 | Method for imaging biological matter using an adiabatic pulse The present invention includes a method for MR imaging of a biological matter having H2O17 content by performing T1ρoff imaging of said H2O17 content in said biological matter. The T1ρ | 08/14/2007 |
| 7251292 | Technique and apparatus for low power wireless communication A system includes first unit, a processor and a transmitter. The processor is located in the first unit to generate data to be communicated to a second unit that is physically separated from the first unit. The transmitter includes an antenna, a first circuit and a ... | 07/31/2007 |
| 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 between any two of the receiver coil loops. One capacitor of each pa... | 07/24/2007 |
| 7245124 | Under-sampled 3D MRI using a shells k-space sampling trajectory A 3D MRI image is acquired as a series of spherical shells of increasing radius. Each shell is sampled by one or more interleaved spiral sampling trajectories and to shorten the scan time one or more spiral sampling trajectories are skipped in the larger shells that... | 07/17/2007 |
| 7242190 | Driven equilibrium and fast-spin echo scanning An NMR imaging process utilizes application of both a driven equilibrium technique and a fast-spin echo technique to acquire image. The fast-spin echo technique is a multiecho NMR imaging sequence, where different echoes are encoded differently to fill the (kx | 07/10/2007 |
| 7242192 | RF surface coil for use in MRI with reduce sensitivity close to the conductors The invention relates to a radio-frequent (RF) coil system (17, 17′) for use in a magnetic resonance imaging (MRI) system. The RF coil system comprises at least one main coil (35) for transmitting an RF magnetic field (B1) into and/or receivin... | 07/10/2007 |
| 7233145 | Method for magnetic resonance imaging with correction for fluctuations in the tramsission field strength In a method for magnetic resonance imaging, whereby magnetic resonance signals in a region of interest of an examination subject are generated in an examination by applying radio-frequency pulses of a first transmission field strength and the magnetic resonance sign... | 06/19/2007 |
| 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 receive mode like a phased array coil, each coil operating independen... | 06/05/2007 |
