241results about "Material analysis by using resonance" patented technology

A system for material detection and identification includes an interface configured to access a. material database associating each of a plurality of materials with one or more corresponding resonance frequencies: an RF transmitter configured to, for each material of at least a subset of the plurality of materials in the material database, transmit into an environment an RF signal at a first resonance frequency for the material; an RF receiver configured, to receive a response signal from the environment for each RF signal; and a processor configured to analyze each response signal for resonance characteristics that indicate a presence of the material and identifying the material to a user if the presence of the material is indicated by the resonance characteristics.

A cold storage material according to an embodiment contains a rare earth aluminum oxide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, in which a Group 1 element is contained in an amount of 0.001 atom % or more and 10 atom % or less, and a maximum volumetric specific heat value in a temperature range of 2 K or more and 10 K or less is 0.5 J / (cm3·K) or more.

The utility model relates to a radio frequency coil assembly for magnetic resonance scanning equipment and the magnetic resonance scanning equipment. The radio frequency coil assembly comprises a first coil structure and a second coil structure, the first coil structure can be worn on a scanning part of a detected object, and the size of the first coil structure can be matched with the size of the scanning part, so that the first coil structure is closer to and fits the scanning part, and magnetic resonance signals emitted by tissues can be received more efficiently; a higher image signal-to-noise ratio is obtained; the second coil structure is separated from the first coil structure and surrounds the outer side of the worn first coil structure, and a certain gap is formed between the second coil structure and the first coil structure, that is, the size of the second coil structure can be made to be larger, so that the device can adapt to detected objects with more body types, and the proportion of applicable people is increased; and moreover, the problem of claustrophobia of the detected object can be relieved, the comfort of the detected object is improved, and the use is more convenient.

The invention relates to a system and method for determining a health metric for an imaging system. The method is a computer-implemented method comprising: receiving (110) sensor data acquired during a diagnostic sequence comprising a plurality of diagnostic intervals, where a different set of subsystems of the imaging system (60) is active during each of the diagnostic intervals, and where the sensor data is acquired during the diagnostic sequence; a respective subset of sensor data is acquired during each of the diagnostic intervals. The method further comprises analyzing (120) the subsets of sensor data, and determining a health metric based on a combination of the subsets of sensor data acquired during different diagnostic intervals by performing mathematical operations between at least two subsets of sensor data acquired during mutually different diagnostic intervals. The method may include determining (130) a state of health of the imaging system based on the health metric.

The invention relates to a magnetic resonance monitoring system, and relates to the technical field of medical detection, the magnetic resonance monitoring system comprises a monitoring module, a preliminary judgment module, a complex judgment module and a scanning host, the monitoring module is installed on each medical device and is used for monitoring the medical device and sending a monitoring result to the preliminary judgment module for preliminary judgment, and the complex judgment module is used for conducting complex judgment; and then a result obtained in the preliminary judgment module is sent to a complex judgment module for complex data processing, and the processed data is sent to a scanning host for display. Through the arrangement of the monitoring module, the monitoring module can perform independent and comprehensive monitoring on each composition module in the magnetic resonance system, the working state data, including power, voltage, temperature, communication state and the like, of each module is obtained in real time, and it is ensured that the operation condition of the whole magnetic resonance system is clearly and accurately understood.

A device utilizing the electron Zeeman splitting effect includes a solid-state material including at least one spin defect. The device further includes a magnetic field generator configured to generate a bias magnetic field and a compensation system to compensate for the effect of temperature changes on the bias magnetic field. The compensation includes a temperature sensor configured to measure either a temperature and a temperature change of the magnetic field generator, and a computer device configured to determine a change in the bias magnetic field as a result of a change in the measured temperature or the measured temperature change. The computer device is further configured to use the determined change in the bias magnetic field to adjust a predetermined bias magnetic field value and to use this value as an input to the compensation system to compensate for the effect of temperature changes on the bias magnetic field.

To provide magnetic regenerator material particles that exhibit a reduced breakage rate even under long-term vibrations due to operation of a refrigerator in an extremely low-temperature region, a regenerator and a refrigerator whose refrigeration performance does not decrease even after long-term operation by virtue of including the magnetic regenerator material particles, and a device such as a superconducting magnet that includes the refrigerator.SOLUTION: Magnetic regenerator material particles of an embodiment are composed of an intermetallic compound containing a rare earth element, and a proportion of an area of voids present in a cross section thereof is 0.0001% or more and 15% or less. A regenerator, a refrigerator, and a device such as a superconducting magnet including the refrigerator according to embodiments include the magnetic regenerator material particles of the embodiment.SELECTED DRAWING: Figure 1

The present disclosure relates to a secondary battery inspection apparatus, a secondary battery inspection method, and a secondary battery manufacturing method, and the problem solved by the present disclosure is to identify an internal state of a secondary battery in a non-destructive manner. A secondary battery inspection apparatus according to one embodiment includes a magnetic field generator configured to apply a magnetic field to the secondary battery to be tested, a high frequency generator configured to generate a high frequency of a predetermined frequency and apply the high frequency to the secondary battery to be tested, a sensor configured to detect electromagnetic waves emitted from the secondary battery to be tested to which the high frequency is applied while the magnetic field is applied and a processor configured to determine an internal state of the secondary battery to be tested using the emitted electromagnetic waves detected by the sensor.

Systems and methods are provided for managing and reducing the severity or impact of a collision involving an apparatus secured to a table associated with a medical imaging and / or therapeutic gantry. Example systems are provided in which an apparatus is secured to the table such that a distal region of the apparatus extends beyond a longitudinal end of the table. A pivot joint associated with the apparatus is provided such that when a collision between the distal region of the apparatus and an object occurs due to motion of the table, the resulting force causes the apparatus to rotate relative to the pivot joint, thus passively accommodating the applied force and preventing, or reducing the likelihood of, mechanical buckling of the apparatus in the presence of the force. In some example embodiments, the apparatus is configured to rotate and / or translate as a result of the force applied during the collision.

The present invention relates to a high-frequency bandpass filter for an MR device, particularly for a transmitting and / or receiving configuration of an MR device, comprising a resonator configuration having a signal input, a signal output, and at least one resonator, wherein each resonator has a capacitor connected in parallel with an inductor, and the inductor comprises a conductive coil body having a substantially HF hermetically sealed cavity. As a result, a high-quality, high-electrical-load-tolerance, and simultaneously low-impedance HF bandpass filter is achieved that can be manufactured simply and at low cost.

The present disclosure provides a solid-state quantum sensor module comprising: a substrate including a first main surface and a second main surface located on an opposite side to the first main surface; a solid-state element, including a color center, located on a first main surface side of the substrate; a light guide plate located between the substrate and the solid-state element; a microwave field-transmitting antenna; a light source located on the first main surface side of the substrate and emits light including a first wavelength that excites the color center from a ground state to an excited state; and a light detector located on the first main surface side of the substrate and detects photoluminescence including a second wavelength emitted from the solid-state element, wherein, when viewed along a normal direction of the first main surface of the substrate, the solid-state element overlaps with the microwave field-transmitting antenna; and when viewed along the normal direction of the first main surface of the substrate, the light detector does not overlap with the microwave field-transmitting antenna.

Image reconstruction systems and methods include providing a sensitivity map of a coil of a magnetic resonance imaging (MRI) system to a neural network. The systems and methods also include providing interleaved k-space data to the neural network, where the interleaved k-space data includes partial k-space data interleaved with zero or synthetic k-space data to provide an extended field of view (FOV) that is different than a FOV utilized during acquisition of the partial k-space data, where the partial k-space data is obtained during a scan of a region of interest of the MRI system. The systems and methods also include outputting a final reconstructed MR image from the neural network based at least on the sensitivity map and the interleaved k-space data, where the final reconstructed MR image includes the FOV utilized during the acquisition of the partial k-space data.

The application discloses a kind of single crystal resonator ferromagnetic resonance line width fast screening device for magnetic tuning filter, belong to microwave component testing field, the testing device includes resonator (1), resonator (2), adjustable DC power supply (3) and vector network analyzer (4);Wherein, the resonator (2) after orientation is placed in resonator (1), the resonator (1) is connected with vector network analyzer (4) and adjustable DC power supply (3) respectively by data line, the application also discloses the method for using the above device to carry out single crystal resonator ferromagnetic resonance line width fast screening for magnetic tuning filter;The screening device of the application can realize the screening of one sample in 30 seconds, and the testing accuracy is good, can meet the demand of batch product screening test, is favorable for improving the tuning efficiency of magnetic tuning filter, reduces production cost, has very strong practical value.

To improve the accuracy of measuring pressure inside a helium container. [Solution] A magnetic resonance imaging apparatus according to one embodiment comprises a superconducting coil, a helium container, a first pressure gauge, a second pressure gauge, a valve, and a control circuit. The superconducting coil generates a static magnetic field. The helium container houses liquid helium for cooling the superconducting coil together with the superconducting coil. The first pressure gauge measures the pressure inside the helium container within a first pressure measurement range. The second pressure gauge measures the pressure inside the helium container within a second pressure measurement range that is narrower than the first pressure measurement range. The valve switches the second pressure gauge to be used for measuring the pressure inside the helium container. The control circuit controls the opening and closing of the valve based on the measurement value of the first pressure gauge.

The invention relates to an artificial skyrmion-based magnetic resonance metamaterial, which comprises a flexible substrate and a spatial spiral artificial skyrmion structure, a load capacitor element is connected in series between the head end and the tail end of the artificial skyrmion structure of the magnetic resonance metamaterial, and the capacitance value is adjusted according to the target frequency. And the resonant frequency of the artificial skyrmion structure is matched with the target Larmor frequency.

The present disclosure provides a magnetic resonance imaging phantom and a method of assembly thereof. In one aspect, the magnetic resonance imaging phantom can include a plurality of modular components. The plurality of modular components can include a first modular component, a second modular component, a shell, and a lid. The second modular component can be different from the first modular component. The shell can be structured to receive at least one modular component. The lid can be attachable to the shell to enclose the at least one modular component received within the shell.

An analytical and mathematical method is described for post-acquisition correction of NMR spectra distorted by static and dynamic field inhomogeneities caused by defects in the main superconducting coils and coldhead operation in a typical cryogen-free magnet. For dynamic inhomogeneities, the method and system apply a variant of a general reference deconvolution method complemented by specific mathematical analysis of spectral parameters. For static inhomogeneities, the system and method apply delayed Fourier processing. This system and method contributes to the general field of NMR spectroscopy and enables the more widespread use of cryogen-free magnets in high-resolution NMR spectroscopy. The method and system used are suitable for fast-scan NMR spectroscopy, in which dynamic distortions in spectra caused by rapid frequency sweeps are removed using a single-resonance reference. Based on the independence of dynamic distortions and NMR properties of the material under study, the phase of the complex quadrature free induction decay (FID) signal of a reference single-resonance sample can be used to extract dynamic field distortions from any spectrum obtained with the same dynamic distortion magnet.

The present disclosure relates to a secondary battery inspection apparatus, a secondary battery inspection method, and a secondary battery manufacturing method, and the problem solved by the present disclosure is to identify an internal state of a secondary battery in a non-destructive manner. A secondary battery inspection apparatus according to one embodiment includes a magnetic field generator configured to apply a magnetic field to the secondary battery to be tested, a high frequency generator configured to generate a high frequency of a predetermined frequency and apply the high frequency to the secondary battery to be tested, a sensor configured to detect electromagnetic waves emitted from the secondary battery to be tested to which the high frequency is applied while the magnetic field is applied and a processor configured to determine an internal state of the secondary battery to be tested using the emitted electromagnetic waves detected by the sensor.

For autonomous MR scanning of a given medical test, a simplified MR scanner can be used without or with little input or control by a technical expert, e.g., by a physician, radiologist, or person trained in MR scanner operation. The MR scanner autonomously positions, scans, checks quality, analyzes, and / or outputs answers to diagnostic questions with or without MR images. Artificial intelligence-based scan analysis allows continuous or instant changes to the scan configuration to acquire the data desired to answer the diagnostic question. By using a simplified MR scanner, both the positioning of the patient relative to the MR scanner and the localization of the scan by the MR scanner are jointly solved. Sensors can sense the patient at the scan position, with reduced radio frequency requirements allowing a more open bore.

The present invention refers to an apparatus 130 for reconstructing MR images and / or parameter maps based on MR time-domain signals. A providing unit 133 provides time-domain signals acquired in time-domain MRI using a k-space sampling pattern and a magnetic resonance acquisition sequence. A providing unit 132 provides a subspace sampling operator that provides given k-space locations of the sampling pattern time subsamples of basis vectors of a compressed subspace. The compressed subspace can be used to compress the time-domain signals. A processing unit 133 processes the time-domain signals using the subspace sampling operator. A reconstruction unit 134 reconstructs MR images and / or parameter maps based on the processed time-domain signals. This allows for more accurate and less computationally resource-intensive reconstruction of MR images and / or parameter maps in the context of time-domain magnetic resonance imaging.

To compensate gain linearity relative to a plurality of input signals having different frequencies.SOLUTION: An RF amplifier includes an FB circuit, acquisition means and changing means. The FB circuit compensates gain linearity relative to an input RF signal. The acquisition means acquires information indicating a frequency of the RF signal. The changing means changes a control range of the FB circuit on the basis of the information indicating the frequency.SELECTED DRAWING: Figure 2

The differential detection system (1) includes an optically trapping diamond nitrogen-vacancy doped layer (2) with an adjacent microwave resonator (4) having a resonant frequency with an operating bandwidth around the magnetic resonance of the nitrogen vacancy center. The microwave resonator (4) includes a suppressed portion (4B) and an unsuppressed portion (4A). A sensor photodiode (6A) is positioned distal to the doped layer (2) and aligned with the unsuppressed portion (4A) of the microwave resonator (4). A reference photodiode (6B) is spaced from the sensor photodiode (6A) and is substantially coplanar with the sensor photodiode (6A), while also aligned with the unsuppressed portion (4A) of the microwave resonator (4). The sensor (6A) and reference photodiode (6B) are connected back-to-back to a single transimpedance amplifier.

The invention relates to a patient somatosensory monitoring system, method, device and equipment. The system comprises a magnetic resonance imaging device used for performing magnetic resonance scanning on a patient; the sensor is used for collecting local somatosensory data of the patient during magnetic resonance scanning in the magnetic resonance imaging equipment; the visual processing unit is used for receiving the local somatosensory data collected by the sensor, and predicting to obtain global somatosensory data according to the local somatosensory data; wherein the type of the local somatosensory data is the same as or different from that of the global somatosensory data; and the display unit is used for receiving the global somatosensory data sent by the visualization processing unit and displaying the global somatosensory data. By adopting the scheme, the arrangement difficulty of the sensor can be reduced.

To improve image quality. [Solution] The image processing apparatus according to this embodiment has a processing circuit. The processing circuit acquires a sensitivity map of a receiving coil, collects an MR image based on the receiving coil, and corrects the signal intensity of the MR image using the sensitivity map and an intensity correction function. The intensity correction function changes according to the signal intensity of the MR image.

In a method for improving the recording of measurement data of an object under inspection, the method includes loading desired imaging parameters and a desired flip angle for recording the measurement data by means of a recording method, wherein the gradient to be switched for position encoding of the measurement data has its full intensity during the incident RF excitation pulse. A quantization value of a desired interference for the recording method is determined based on the desired imaging parameters, and a check on the feasibility of correcting for the interference is performed based on the quantization value and the desired flip angle.

The embodiment of the invention provides a method for generating a magnetic resonance image and a magnetic resonance imaging system, and the method comprises the steps: obtaining at least two data sets collected through employing at least two groups of pulse sequences, and enabling the data collection windows of each group of pulse sequences to have migration time; respectively generating a corresponding reconstructed image according to each of the at least two data sets; and synthesizing the at least two reconstructed images to obtain a magnetic resonance image. The method can inhibit fat artifacts in the magnetic resonance image.

Methods and systems herein may perform nuclear magnetic resonance measurements, and nuclear magnetic resonance tools, the method and systems comprising: acquiring, using an NMR sensor a first NMR signal from a volume in a subterranean region, wherein the first NMR signal is acquired using a first acquisition window. Further, acquiring, using the NMR sensor a second NMR signal from a volume in the subterranean region, wherein the second NMR signal is acquired using a second acquisition window different from the first acquisition window, wherein the first NMR signal and the second NMR signal form an NMR relaxation data; determining, using the first NMR signal and the second NMR signal, a correction term. Finally, the correction term may be used to acquire a corrected relaxation data set.

A magnetic detector (1) comprises: a diamond substrate (10) having an NV center (11); a transparent first substrate (13) on which the diamond substrate is disposed; a radiating body (24) provided on a surface of the first substrate (13) or on the surface of the diamond substrate (10) that is opposite from the surface on which the NV center (11) is provided; and a second substrate (15) which has an opening (16) and on which the first substrate (13) is disposed. The diamond substrate (10) is at least partially exposed through the opening (16).

The present invention relates to a method of manufacturing a liquid cosmetic impregnation foam and the foam, the method including a test method for the liquid cosmetic impregnation foam. The test method for the liquid cosmetic impregnation foam according to one embodiment of the present invention can include the steps of: manufacturing a liquid cosmetic impregnation foam capable of being used to impregnate a liquid or solid cosmetic composition; performing an FT-IR test on the manufactured liquid cosmetic impregnation foam; determining whether a result value of the FT-IR test is within a specific ratio range that provides a balance of hydrolysis resistance, water resistance, and oil resistance of the liquid cosmetic impregnation foam; and if the result value of the FT-IR test is within the specific ratio range, performing a solid NMR test.

To provide an instrument which generates a shear flow in a sample and enables NMR lock without affecting the composition of the sample to be measured.SOLUTION: The shear flow generator 10 is an instrument for generating a shear flow in a sample S to be measured in a state of being inserted into a sample introduction hole 91 of a magnetic resonance device 90, and includes a sample tube 1 for storing the sample S to be measured, a stirring tube 2 which is a bottomed tube for storing a reference sample for NMR lock, has a bottomed tip 2a side inserted into the sample tube 1, and applies a shear force to the sample S by rotating around a long axis, and a holding portion 3 for holding both the sample tube 1 and the stirring tube 2.SELECTED DRAWING: Figure 2