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| Number | Title | Issue Date |
| 7439814 | Method and system for operating an atomic clock with simultaneous control of frequency and magnetic field The present invention relates to a method and system in which multi-coherent resonances of a microwave in which the alkali-metal atoms in the ground state are driven simultaneously by a microwave hyperfine frequency ΩH and a Zeeman frequency ΩZ | 10/21/2008 |
| 7282910 | Nuclear magnetic resonance gyroscope A method comprises the steps of providing a nuclear magnetic resonance cell with first, second, and third nuclear moment gases and at least one optically pumpable substance; obtaining first, second, and third measured precession frequencies that correspond to the fi... | 10/16/2007 |
| 7268550 | Antenna element and antenna arrangement for magnetic resonance applications An antenna element for magnetic resonance applications has at least one sub-section that extends along a section axis and is adjacent to an auxiliary circuit. The antenna element has a coupling section and an auxiliary circuit section that is inductively coupled to ... | 09/11/2007 |
| 7259563 | Magnetic resonance imaging apparatus and its control method A magnetic resonance imaging apparatus includes a phased array coil including a plurality of local coils, a pre-scanning unit which pre-scans, before image scanning, an area including at least part of an image scanning area, a determination unit which determines whe... | 08/21/2007 |
| 7256580 | Magnetic resonance imaging apparatus and magnetic resonance imaging method A magnetic resonance imaging apparatus comprising an imaging condition setting unit, a gradient coil, a radio frequency coil, a data acquisition unit, an image reconstructing unit and an image data generating unit. The imaging condition setting unit sets a first ima... | 08/14/2007 |
| 7239135 | NMR gyroscope An NMR gyroscope in one example comprises a support structure affixed within an enclosure, an NMR cell affixed to the support structure, a plurality of permanent magnets disposed about the NMR cell to produce a magnetic field within the cell, and a field coil dispos... | 07/03/2007 |
| 7181348 | Automatic identification of compounds in a sample mixture by means of NMR spectroscopy A computer implemented process for producing a representation of a reference spectrum for a hypothetical solution having a first pH condition, for use in determining the composition of a test sample, is disclosed, The process involves producing a position value for ... | 02/20/2007 |
| 7081748 | Magnetic resonance scanner with electromagnetic position and orientation tracking device A system for combining electromagnetic position and orientation tracking with magnetic resonance scanner is provided. One embodiment includes a magnetic resonance scanner defining a reference coordinate system for scanning a target. Coupled to the magnetic resonance... | 07/25/2006 |
| 6998841 | Method and system which forms an isotropic, high-resolution, three-dimensional diagnostic image of a subject from two-dimensional image data scans MRI scans typically have higher resolution within a slice than between slices. To improve the resolution, two MRI scans are taken in different, preferably orthogonal, directions. The scans are registered by maximizing a correlation between their gradients and then f... | 02/14/2006 |
| 6984981 | Magnetic resonance method and system forming an isotropic, high resolution, three-dimensional diagnostic image of a subject from two-dimensional image data scans MRI scans typically have higher resolution within a slice than between slices. To improve the resolution, two MRI scans are taken in different, preferably orthogonal, directions. The scans are registered by maximizing a correlation between their gradients and then f... | 01/10/2006 |
| 6844726 | Vector measurement of a magnetic field A vectorial magnetometer (1), measures the components of a magnetic field in three directions (Oxyz) using a scalar magnetometer (2). The field is periodically modulated in each of the directions by generators (Gx, Gy, Gz) which have a specific frequen... | 01/18/2005 |
| 6675033 | Magnetic resonance imaging guidewire probe The invention describes a system, method, and means for an MRI guidewire that can be visible on an MRI, can act as an antenna and receive MRI signals from surrounding subject matter, and can allow the use of multiple interventional tools without removal o... | 01/06/2004 |
| 6381485 | Registration of human anatomy integrated for electromagnetic localization A method for use during a procedure on a body. The method generates a display representing relative positions of two structure during the procedure. The method includes the steps of storing an image data set in memory, the image data set representing the ... | 04/30/2002 |
| 6370414 | System and method for measuring, estimating and displaying RMS current density maps A method of performing synthetic aperture magnetometery on the signals from a target organ using an array of biomagnetic sensors positioned in a predetermined manner around the target organ, each sensor in the array having a position vector and an orienta... | 04/09/2002 |
| 5528143 | Loop oscillator NMR probe A nuclear magnetic resonance probe is provided comprising a high frequency resonator (14, 16) having a resonant frequency, a first coaxial conductor (20) connected to the high frequency resonator, and a high frequency supply which supplies the first coaxi... | 06/18/1996 |
| 5455511 | Digital directional resonance magnetometer The magnetometer according to the invention comprises a logic unit (50) receiving a resonance detection signal, a digital processor (60) supplying a number N, a digital-analog converter converting said number into current for establishing a feedback. The ... | 10/03/1995 |
| 5332971 | Permanent magnet for nuclear magnetic resonance imaging equipment A permanent magnet for nuclear magnetic resonance imaging that provides an intense and highly homogeneous magnetic magnetic field is disclosed. The magnet is made up of a set of rings having two sub-sets of rings of permanently magnetized polygonal blocks... | 07/26/1994 |
| 5258709 | Method and apparatus for localizing submarines A method and an apparatus are disclosed serving to localize proton-poor objects situated in aqueous surroundings, in particular to localize submarines or sea mines in an ocean or an inland water. By using a nuclear magnetic proton resonance technique, a m... | 11/02/1993 |
| 5254947 | Optical pumping, resonance magnetometer using a plurality of multiplexed beams A magnetometer for precise measurement of weak magnetic fields involves a system which injects a plurality of light beams into a gas containing cell. An optical multiplexer receives the light beams emitted by a source and successively supplies a plurality... | 10/19/1993 |
| 5245280 | Magnetic resonance magnetometer with multiplexed exciting windings A magnetometer having three trirectangular trihedron windings (20x, 20y, 20z) which are put into service successively by a multiplexer (50). The means frequency (Fm) of the three measurement signals is independent of the orientation of the weak... | 09/14/1993 |
| 5225778 | Optical pumping, resonance magnetometer using a sequential polarization An improved optical pumping magnetometer with sequential polarization for measurement of weak magnetic fields involves a device which sequentially modifies the polarization either in the direction of the polarization or from clockwise to counterclockwise ... | 07/06/1993 |
| 5221897 | Directional resonance magnetometer It is used for measuring a magnetic-field Hlex, which is the projection, in a given direction, of a field Hex and which incorporates a sample (2) containing resonant spins, first means (4) for exciting the resonance and detecting the latter, second means ... | 06/22/1993 |
| 5187438 | Shielded magnetometer An improved shielded magnetometer including a resonant probe containing a magnetically resonating material held in a resonator. The magnetometer has a spherical electromagnetic shield which exhibits improvements in the sensitivity characteristics by remov... | 02/16/1993 |
| 4641094 | Magnetometer circuit for measuring the period of beat frequency maxima A conventional magnetometer produces an output signal (10) which comprises a series of pulses (12, 14, 16). Each of these pulses has a beat frequency maximum. These pulses are input to a comparator (50) which makes a comparison to a threshold voltage V | 02/03/1987 |
| 4544891 | Nuclear magnetic resonance gyroscope A nuclear magnetic resonance gyroscope which derives angular rotation thef from the phases of precessing nuclear moments utilizes a single-resonance cell situated in the center of a uniform DC magnetic field. The field is generated by current flow throug... | 10/01/1985 |
| 4327327 | All-angle gradient magnetometer In order to provide an all-angle gradient magnetometer, first and second magnetic resonance cells are mounted to a common base and separated by a predetermined distance. Circularly polarized pumping light is passed through the two cells orthogonally. Mixe... | 04/27/1982 |
| 4260949 | Magnetic field detection apparatus A magnetic field detector for determining the presence of a magnetic field disturbance in the vicinity of the apparatus senses the difference in magnetic fields at two spaced-apart locations. A pair of field sensors, each including a body of polarizable l... | 04/07/1981 |
| 4225818 | Cryogenic nuclear gyroscope A cryogenic nuclear gyroscope comprises a cylinder of niobium cooled within a helium cryostat so as to be superconducting and to provide a trapped, substantially homogeneous magnetic field, a helium-3 sample contained within a spherical pyrex cell having ... | 09/30/1980 |
| 4157495 | Nuclear magnetic resonance gyro A nuclear magnetic resonance gyroscope is disclosed that operates on the principle of sensing angular rotation rate as a shift in the Larmor frequency of one or more nuclear species that possess nuclear magnetic moments.... | 06/05/1979 |
