| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 324301000 | Using a magnetometer | 23 |
| 20130027034 | NUCLEAR MAGNETIC RESONANCE MAGNETOMETER EMPLOYING OPTICALLY INDUCED HYPERPOLARIZATION - A magnetometer includes: a sample ( | 01-31-2013 |
| 20100072993 | Method of Detecting Carrier Spin Polarisation and Apparatus for the Same - A method of detecting spin polarization in a subject material comprises applying a potential difference across the subject material causing an electrical current to flow across the material, thereby inducing carrier polarization within the material in a direction perpendicular to the direction of current flow, carriers of one spin orientation concentrating at a first edge of the subject material and carriers of the opposite orientation concentrating at a second edge of the material, opposite to the first edge under the action of the Spin Hall Effect (SHE); allowing spin polarized carriers to tunnel into a ferromagnetic material from the subject material in at least a portion adjacent one of the first or second edges of the subject material; and measuring the tunneling magnetoresistance (TMR) between the ferromagnetic material and the subject material at the first or second edge. An apparatus for analyzing carrier spin polarization comprises a subject material; means for applying an electric field to the subject material so as to induce a current to flow through the subject material, thereby inducing spin polarization of carriers at opposing first and second edges of the subject material in a direction perpendicular to the electric field under the action of the spin Hall effect (SHE); a ferromagnetic material in contact with at least a portion adjacent one of the first or second edges of the subject material; and means for measuring the tunneling magnetoresistance between the ferromagnetic material and the subject material at the first or second edge. | 03-25-2010 |
| 20130082700 | NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS AND NUCLEAR MAGNETIC RESONANCE IMAGING METHOD - The present invention has an object to provide a nuclear magnetic resonance imaging apparatus or the like that avoids a region with zero sensitivity of an optical magnetometer and allows imaging by strong magnetic resonance when a common magnetic field is used as a bias field of an optical magnetometer and as a magnetostatic field to be applied to a sample. When a direction of a magnetostatic field application unit applying a magnetostatic field to a sample is a z direction, alkali metal cell of a scalar magnetometer is arranged so as not to overlap a region to be imaged in a z direction, and so as not to intersect the region to be imaged in an in-plane direction perpendicular to the z direction. | 04-04-2013 |
| 20130082701 | NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS AND NUCLEAR MAGNETIC RESONANCE IMAGING METHOD - The present invention has an object to provide a nuclear magnetic resonance imaging apparatus or the like that avoids a region with zero sensitivity of an optical magnetometer and allows imaging by strong magnetic resonance when a common magnetic field is used as a bias field of an optical magnetometer and as a magnetostatic field to be applied to a sample. When a direction of a magnetostatic field application unit applying a magnetostatic field to a sample is a z direction, alkali metal cells of a plurality of scalar magnetometers are arranged so as not to overlap a region to be imaged in a z direction, and so as not to intersect the region to be imaged in an in-plane direction perpendicular to the z direction. | 04-04-2013 |
| 20110279115 | METHOD AND APPARATUS FOR IMPLEMENTING EIT MAGNETOMETRY - A magnetometer is provided comprising an atomic vapor in an enclosure, a source of light for preparing the vapor into a state exhibiting electromagnetically induced transparency, a first laser beam passing through the atomic vapor, a phase detector for detecting changes in phase of the first laser beam, and a controller which controls the light source and laser beam and receives the information detected by the phase detector in order to compute from those changes in phase a magnetic field strength in the presence of a selected background magnetic field of at least 0.001 T. Operation in the presence of a background field helps make this magnetometer suitable for diagnostic imaging applications. | 11-17-2011 |
| 20100201357 | METHOD OF LOCALLY MEASURING MOBILITY OF PROTIC SOLVENT IN SAMPLE, INSTRUMENT OF LOCALLY MEASURING MOBILITY OF PROTIC SOLVENT IN SAMPLE, MEASURING INSTRUMENT LOCALLY MEASURING BEHAVIOR OF PROTIC SOLVENT IN SAMPLE BASED ON MAGNETIC - An instrument locally measuring mobility of a protic solvent in a sample | 08-12-2010 |
| 20110221438 | MAGNETIC PARTICLE IMAGING DEVICES AND METHODS - A magnetic particle imaging device is provided. The device includes a magnetic field source configured to produce a magnetic field having a non-saturating magnetic field region, an excitation signal source configured to produce an excitation signal in the non-saturating magnetic field region that produces a detectable signal from magnetic particles in the non-saturating magnetic field region, and a signal processor configured to convert a detected signal into an image of the magnetic particles. Aspects of the present disclosure also include methods of imaging magnetic particles in a sample, and methods of producing an image of magnetic particles in a subject. The subject devices and methods find use in a variety of applications, such as medical imaging applications. | 09-15-2011 |
| 20090079426 | ELECTROMAGNETIC TRACKING EMPLOYING SCALAR-MAGNETOMETER - Provided is an electromagnetic tracking system, including at least one electromagnetic field receiver having at least one scalar-magnetometer, at least one electromagnetic field transmitter, and tracker electronics. Also provided is a method for electromagnetic tracking, including generating at least one magnetic field, sensing the at least one magnetic field with at least one scalar-magnetometer, and determining a relative position of the at least one scalar-magnetometer based on the sensed at least one magnetic field. | 03-26-2009 |
| 20120126808 | APPARATUS AND METHOD FOR GENERATING AND MOVING A MAGNETIC FIELD HAVING A FIELD FREE LINE - The present invention relates to an apparatus and a method for generating and changing a magnetic field in a field of view ( | 05-24-2012 |
| 20090243610 | ATOMIC MAGNETOMETER AND MAGNETIC FORCE MEASURING METHOD - An atomic magnetometer includes a cell containing an atomic group, a pump light source, a probe light source, a mirror, and a detector. The cell is disposed between the pump light source and the mirror and between the probe light source and the detector. A pump beam emitted from the pump light source is circularly polarized light. The pump beam passes through the cell and is reflected by the mirror and then passes through the cell again. The probe beam emitted from the probe light source is linearly polarized light. An optical path of the probe beam is parallel to a plane of incidence of the pump beam and is also parallel to a surface of the mirror. The optical path of the probe beam crosses an optical path of the pump beam in the cell. The probe beam which has passed through the cell enters the detector. | 10-01-2009 |
| 20110074408 | PROTON PRECESSION MAGNETOMETER SENSOR MEASURABLE IN ALL DIRECTION - A “proton precession magnetometer sensor capable of all-direction measurement” according to the present invention, in which frequency of current induced in a coil by flowing and then breaking current in the coil is measured to calculate strength of an external magnetic field, is characterized in that the coil is a toroid coil. Alternatively, the coil may be achieved by two solenoid coils connected perpendicularly, or N solenoid coils connected in the form of a polygon, where N is an integer of 3 or more. The proton precession magnetometer sensor is capable of measuring the external magnetic field in all directions since there is no dead band, and is convenient since there is no need of adjusting the sensor to a certain direction when measuring magnetic force. Further, the present invention will bring accumulation of key original technology applicable to various cases in practice through development of improved impedance matching and power consumption optimization in future practice. | 03-31-2011 |
| 20110089943 | MAGNETIC FIELD ADJUSTMENT FOR MRI APPARATUS - A measured error magnetic field distribution is divided into eigen-mode components obtained by a singular decomposition and iron piece arrangements corresponding to respective modes are combined and arranged on a shim-tray. An eigen-mode to be corrected is selected in accordance with an attainable magnetic field accuracy (homogeneity) and appropriateness of arranged volume of the iron pieces. Because the adjustment can be made with the attainable magnetic field accuracy (homogeneity) being known, an erroneous adjustment can also be known, and the adjustment is automatically done during repeated adjustments. As a result, an apparatus with a high accuracy can be provided. In addition, there is an advantageous effect of being able to detect a poor magnet earlier by checking the attainable homogeneity. | 04-21-2011 |
| 20120176130 | Detection of J-Coupling Using Atomic Magnetometer - An embodiment of a method of detecting a J-coupling includes providing a polarized analyte adjacent to a vapor cell of an atomic magnetometer; and measuring one or more J-coupling parameters using the atomic magnetometer. According to an embodiment, measuring the one or more J-coupling parameters includes detecting a magnetic field created by the polarized analyte as the magnetic field evolves under a J-coupling interaction. | 07-12-2012 |
| 20120153948 | APPARATUS AND METHOD FOR INFLUENCING AND/OR DETECTING MAGNETIC PARTICLES IN A FIELD OF VIEW - The present invention relates to an apparatus ( | 06-21-2012 |
| 20120153949 | APPARATUS AND METHOD FOR INFLUENCING AND/OR DETECTING MAGNETIC PARTICLES - The present invention relates to an MPI (Magnetic Particle Imaging) apparatus and a method for influencing and/or detecting magnetic particles in a field of view. Rather than moving the FFP (field free point) along a single, time-consuming high density trajectory it is proposed to use a number of low density trajectories with travelling phase, wherein each of said low density trajectories has the form of a closed curve differently located within the field of view. | 06-21-2012 |
| 20110089942 | IMPROVED TECHNIQUES FOR MAGNETIC PARTICLE IMAGING - A magnetic particle imaging apparatus includes magnets [ | 04-21-2011 |
| 20120169333 | MOTION MONITORING SYSTEM FOR MONITORING MOTION WITHIN A REGION OF INTEREST - The invention relates to a motion monitoring system ( | 07-05-2012 |
| 20100327865 | MAGNETIC SENSOR - A magnetic sensor for measuring a magnetic field using an optical pumping method includes a first gas in which a valence electron is composed of an odd number of atoms or ions, a probe light incidence device which causes first probe light including straight polarized light to be incident on the first gas, a second gas in which a valence electron arranged on an optical path of second probe light that is the first probe light transmitted through the first gas is composed of an odd number of atoms or ions, a pumping light incidence device which causes first pumping light including first circular polarized light to be incident on the first gas and second pumping light including second circular polarized light to be incident on the second gas, and a detector which detects a rotation angle of a polarization plane of the first probe light and a polarization plane of third probe light that is the second probe light transmitted through the second gas. | 12-30-2010 |
| 20120235676 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - According to one embodiment, a magnetic resonance imaging apparatus includes a data acquisition unit, an eddy magnetic field measuring unit and an imaging unit. The data acquisition unit is configured to acquire magnetic resonance signals at mutually different timings with applying a gradient magnetic field for generating an eddy magnetic field. The eddy magnetic field measuring unit is configured to acquire eddy magnetic field information including a time constant of the eddy magnetic field based on phase information of the magnetic resonance signals acquired at the timings. The imaging unit is configured to perform imaging under an imaging condition or a data processing condition according to the eddy magnetic field information. | 09-20-2012 |
| 20120326717 | PARTIAL POLARIZATION TRANSFER FOR SINGLE-SCAN MAGNETIC RESONANCE SPECTROSCOPY AND IMAGING - A method of measuring precessing magnetization includes providing a first site characterized by a first spin order and providing a second site. The method also includes transferring a portion of the first spin order from the first site to the second site. The second site is characterized by a second spin order orthogonal to the first spin order. The method further includes exposing a sample including the first site and the second site to a magnetic field, measuring a precessing magnetization of at least one of the first site or the second site, repeating the transferring a portion of the first spin order from the first site to the second site, and repeating the measuring of the precessing magnetization. | 12-27-2012 |
| 20110273176 | SYSTEM AND METHOD FOR USE OF NANOPARTICLES IN IMAGING AND TEMPERATURE MEASUREMENT - This invention provides a system and method that improves the sensitivity and localization capabilities of Magnetic Particle Imaging (MPI) by using combinations of time-varying and static magnetic fields. Combinations of magnetic fields can be used to distribute the signals coming from the magnetic particles among the harmonics and other frequencies in specific ways to improve sensitivity and to provide localization information to speed up or improve the signal-to-noise ratio (SNR) of imaging and/or eliminate the need for saturation fields currently used in MPI. In various embodiments, coils can be provided to extend the sub-saturation region in which nanoparticles reside; to provide a static field offset to bring nanoparticles nearer to saturation; to introduce even and odd harmonics that can be observed; and/or to introduce combinations of frequencies for more-defined observation of signals from nanoparticles. Further embodiments provide for reading of the signal produced by cyclically saturated magnetic nanoparticles in a sample so as to provide a measurement of the temperature of those nanoparticles. | 11-10-2011 |
| 20110273175 | PERMANENT MAGNETIC ASSEMBLY FOR - The present invention relates to an arrangement ( | 11-10-2011 |
| 20120280682 | Systems for Characterizing Resonance Behavior of Magnetostrictive Resonators - Illustrative embodiments of systems for characterizing resonance behavior of magnetostrictive resonators are disclosed. In one illustrative embodiment, an apparatus may comprise a first channel including one or more driving coils and one or more magnetostrictive resonators, the first channel having a first impedance; a second channel having a second impedance, the second impedance differing from the first impedance by an impedance attributable to the one or more magnetostrictive resonators; a signal source configured to apply an input signal to both the first and second channels; and a signal receiver configured to generate a combined output signal in response to output signals measured from both the first and second channels. | 11-08-2012 |
