Entries |
Document | Title | Date |
20080204012 | Magnetic Tracking System for an Imaging System - The invention relates to magnetic tracking system that is particularly adapted for a combination with an imaging system, for example with a rotational X-ray device ( | 08-28-2008 |
20080211495 | Infinitely Configurable RF Receive Coil - Described herein is a radiofrequency receive coil system for a magnetic resonance imaging (MRI) system that includes an array of a plurality of individual coils arrayed around the outer limits of the imaging volume that is defined by a main magnet and a gradient coil, positioned tangentially down the length of said volume, with the plurality of individual coils each having an initial position with relation to the patient to be imaged; and mechanical support for the individual coils. The individual coils may be dynamically repositioned for optimal imaging. A further embodiment of the system includes an array of individual coils positioned radially on the vertical plane around the patient table, which may advance into the gantry before imaging. The method for use of the receive coil system is also described. | 09-04-2008 |
20080272773 | VISCOSITY DETERMINATION FROM LOGARITHMIC MEAN RATIO OF RELAXATION TIMES - A method for determining viscosity, η, of a fluid downhole, calls for performing a nuclear magnetic resonance (NMR) survey of the fluid; determining a longitudinal relaxation time, T | 11-06-2008 |
20080272774 | Magnetic Resonance Method for the Detection and Imaging of Susceptibility Related Magnetic Field Distortions - Disclosed are methods and apparatuses for generating susceptibility-related contrast images, as induced, e.g., by marker material interventional devices used for passive MR-guided interventions, or by particles or cells loaded with marker materials used for molecular imaging, cell-tracking or cell-labeling. Near a local magnetic field perturber a positive contrast signal emanates from local gradient compensation to form, e.g., a balanced SSFP type of echo, whereas everywhere else echoes are shifted outside of the data acquisition window. | 11-06-2008 |
20090027049 | Cancellation of ringing artifacts and far field interference in nuclear quadrupole resonance - A device for detecting a class of target species containing quadrupolar nuclei in a specimen by nuclear quadrupole resonance, comprising pulse generating means for generating a three-pulse-composite-pulse to refocus signals that were excited by another pulse, irradiating means for irradiating a specimen with the three-pulse-composite-pulse, detecting means for detecting an NQR signal in response to irradiating the specimen, coupling means for transmitting the three-pulse-composite-pulse to the irradiating means, coupling means for receiving the NQR signal from the detecting means and transform means for converting the free induction decay signal into a frequency domain signal. A method for detecting a class of target species containing quadrupolar nuclei in a specimen by nuclear quadrupole resonance, comprising generating a three-pulse-composite-pulse, irradiating said specimen with said three-pulse-composite-pulse, detecting an NQR signal in response to irradiating said specimen and converting said free induction decay signal into a frequency domain signal. | 01-29-2009 |
20100117641 | DETECTION OF MAGNETIC BEADS USING A MAGNETORESISTIVE DEVICE TOGETHER WITH FERROMAGNETIC RESONANCE - A method and apparatus for detecting the presence of magnetic beads is disclosed. By providing both a static magnetic field and a magnetic field that alternates in the MHz range, or beyond, the bead can be excited into FMR (ferromagnetic resonance). The appearance of the latter is then detected by a magneto-resistive type of sensor. This approach offers several advantages over prior art methods in which the magnetic moment of the bead is detected directly. | 05-13-2010 |
20100225312 | Signal processing device using magnetic film and signal processing method - A signal processing device includes a continuous film, a plurality of spin wave generators, and at least one signal detector. The continuous film includes at least one magnetic layer. The plurality of spin wave generators are provided on the continuous film in such a manner as to be in direct contact with the continuous film or be in contact with the continuous film while having an insulation layer interposed therebetween, and each has a contact surface with the continuous film in a dot shape and generates a spin wave in a region of the magnetic layer of the continuous film by receiving an input signal, the region being immediately under the contact surface. The signal detector is provided on the continuous film and detects, as an electrical signal, the spin waves generated by the spin wave generators and propagating through the continuous film. | 09-09-2010 |
20110193558 | PASSENGER SCANNING SYSTEMS FOR DETECTING CONTRABAND - A passenger scanning system includes a passenger screening area configured for a person to enter and a shield surrounding at least a portion of the passenger screening area. The shield is configured to reduce a radio frequency interference within the passenger screening area. The passenger scanning system also includes one or more sensors positioned in the passenger screening area at a height configured to be proximate one or more of an abdominal region, a groin region, and a pelvic region of the entered person. The sensors are configured to generate a signal in response to a target substance located in the one or more of the abdominal region, the groin region, and the pelvic region. | 08-11-2011 |
20110210728 | ENHANCING SIGNALS - A method of testing a sample comprising the steps of: applying an excitation to the sample; detecting a response signal from the sample; processing a first part and a second part of the response signal; and determining from the second part of the response signal information with which to enhance the first part of the response signal. | 09-01-2011 |
20110309830 | CURRENT DETECTING AND INDICATING DEVICE - A current detecting and indicating device includes a detection unit and a display unit. The detection unit has a power module, a current detecting module, a multiplexer module and a transmission module. The power module includes positive and negative electrodes. The current detecting module includes a plurality of upper-limit switching units and a lower-limit switching unit. Each upper-limit switching unit has two ends coupled to the positive and negative electrodes, and the lower-limit switching unit has two ends coupled to the positive and negative electrodes. The multiplexer module includes a first input port and a first output port. The transmission module includes a micro-controller unit and a transmission device. The micro-controller unit includes a low-level end, a high-level end and a second input port. The second input port is coupled to the first output port. The display unit is coupled to the transmission device for receiving signals therefrom. | 12-22-2011 |
20120001628 | Method and apparatus for obtaining spatial information and measuring the dielectric constant of an object - Methods and apparatus are provided for obtaining spatial information about an object, and for measuring the dielectric constant of an object. They include placing the object in a cavity and interacting electromagnetic radiation at a plurality of frequencies with the object to obtain a corresponding plurality of measured resonant transverse magnetic modes. They also include using the plurality of measured resonant transverse magnetic modes to obtain the spatial information for the object, and/or using the plurality of measured resonant transverse magnetic modes to obtain the dielectric constant for the object. | 01-05-2012 |
20120019242 | METHOD AND APPARATUS FOR MONITORING A PROPERTY OF A SAMPLE - The present disclosure provides a method of monitoring a property of a sample, such as a nanoscopic property of the sample. The method comprises the steps of providing a quantum probe having a quantum state and exposing the quantum probe to the sample in a manner such that the property of the sample, in the proximity of the quantum probe, affects quantum coherence of the quantum probe. The method also comprises detecting a rate of quantum decoherence of the quantum probe to monitor the property of the sample. Further the present disclosure provides an apparatus for monitoring a property of a sample. | 01-26-2012 |
20120032675 | Apparatus and Method for Ferromagnetic Object Detector - An apparatus is provided for compensating for the effect of a stray ferromagnetic object moving past but not through a sensing region of a ferromagnetic object detector. The ferromagnetic object detector is of a type to produce a plurality of sensor signals, each sensor signal being influenced by the presence of a genuine ferromagnetic object moving through the sensing region but also liable to be influenced by the presence of the stray object. The apparatus comprises: an input for receiving the plurality of sensor signals and first means for analysing the received signals to determine whether there is a substantially same time-varying component present in each of the signals. The apparatus also comprises second means for determining whether the plurality of signals without the contribution of that time-varying component are each or collectively below a predetermined level of significance. The apparatus also comprises third means for indicating, if the respective determinations from the first and second means are both positive, that the received signals are likely to relate to a stray object and not to a genuine ferromagnetic object moving through the sensing region. | 02-09-2012 |
20120068699 | PHANTOM FOR DIFFUSION MRI IMAGING - A phantom calibration body ( | 03-22-2012 |
20120182011 | PHASE DETECTION IN AN ATOMIC SENSING SYSTEM - One embodiment of the invention includes an atomic sensing system. The system includes an atomic sensing device configured to generate an output signal along an output axis in response to a plurality of control parameters. The system also includes a signal generator configured to apply a reference signal to a cross-axis that is approximately orthogonal to the output axis. The system also includes a phase measurement system configured to demodulate the output signal relative to the reference signal to measure a relative phase alignment between the output axis and a physical axis of the atomic sensing device based on the reference signal. | 07-19-2012 |
20130088224 | QUANTUM COMPUTER - Values of quantum bits used for a quantum computer is stabilized and the number of quantum bits per element is set to be 100 or more while ensuring quantum state stability during calculation of the quantum bits, quantum state controllability, and capability of achieving large-scale integration of quantum bits. Quantum calculation is performed as generating a spin vortex | 04-11-2013 |
20130293227 | METHOD FOR GENERATING SPIN WAVES - In the method, a pre-selected working area of a graphene film with a linear dimension of 2,000 nm, which working area is divided into sections having a dimension of 50-100 nm, is subjected to the effect of a pulsed alternating magnetic field with a frequency of 3 terahertz that corresponds to the transition from the ground energy level, corresponding to the non-excited state of spin density, to a fourth working energy level of the excited state of spin density in the graphene film, thus causing spin density pumping. A spatially localized external magnetic field is generated around the edges of the working area, which resonantly reflects spinons having a working frequency of 0.5-1 terahertz that corresponds to the transition from a third working energy level to a second working energy level of the excited state of spin density, said spinons causing the induced coherent radiation of working frequency spin waves as they pass thorough the working area. | 11-07-2013 |
20140191752 | Spectral Decomposition Of Composite Solid State Spin Environments Through Quantum Control of Spin Impurities - Methods and systems are described for spectral decomposition of composite solid-state spin environments through quantum control of electronic spin impurities. Δ sequence of spin-control modulation pulses are applied to the electronic spin impurities in the solid-state spin systems. The spectral content of the spin bath that surrounds the electronic spin impurities within the solid-state spin system is extracted, by measuring the coherent evolution and associated decoherence of the spin impurities as a function of number of the applied modulation pulses, and the time-spacing between the pulses. Using these methods, fundamental properties of the spin environment such as the correlation times and the coupling strengths for both electronic and nuclear spins in the spin bath, can be determined. | 07-10-2014 |
20140197830 | PROXIMITY DETECTION VIA MAGNETIC RESONANCE COUPLING - A magnetic resonance technology is used to implement front and back proximity sensing capability for wireless devices such as a laptap device. For example, a high quality (Q) factor coil antenna may be embedded in a display, such as a liquid crystal display, of a first laptap device to detect other wireless devices (e.g., a second laptap) that are within coupling distance of the first laptap device. In this example, the second laptap device induces a sine wave signal to the first laptap device if the second laptap device is physically located at backside of the first laptap device. Otherwise, the second laptap device may induce a cosine wave signal to the first laptap device if the second laptap device is physically located at the front side of the first laptap device. | 07-17-2014 |
20150084625 | PHANTOM FOR MAGNETIC RESONANCE IMAGING SYSTEM - A phantom for an MRI system is provided. The phantom includes a third layer, the third layer including a first structure and a second structure, the first structure including two adjacent wedge-shaped objects in opposite directions which do not generate magnetic resonance signals, the second structure includes a first module group pair, the first module group pair including a first module group and a second module group, the first module group and the second module group each including multiple modules which are identical to each other, aligned with each other and separated from each other by the same distance, and the first module group and the second module group are perpendicular to each other. The phantom for an MRI system can satisfy measurement of multiple image quality indices such as layer thickness and resolution at the same time, which saves a large amount of repetitive work and time. | 03-26-2015 |
20150097561 | MICROWAVE CAVITY SENSOR - A sensor comprising: a dielectric waveguide for guiding a microwave signal; and a dielectric reflector at an end of the dielectric waveguide to cause formation of a sensing field beyond an outer surface of the dielectric reflector. | 04-09-2015 |
20170234948 | METHOD AND APPARATUS FOR HARDWARE RF RECEIVER CHANNEL REDUCTION | 08-17-2017 |