367results 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.

The invention relates to the technical field of quantum precision measurement, and provides a quantum magnetometer which comprises a solid-state spinning color center probe, a microwave module, a laser module, a photoelectric detection module, a lock-in amplification module, a PID module and a data processing module. According to the scheme, an ODMR sweep frequency spectrum line does not need to be drawn when the magnetic field is measured every time, tracking of the changing magnetic resonance frequency can be rapidly achieved through comparison of the target data and the demodulation result, the time for obtaining the new magnetic resonance frequency is greatly shortened, and the magnetic measurement efficiency of the quantum magnetometer is improved.

The invention discloses a self-adaptive calibration high-frequency test method and a self-adaptive calibration high-frequency test system. The method relates to the technical field of magnetic variable measurement, and comprises the following steps: quantizing signal interference; optimizing signal interference; and performing uniformity influence quantification and magnetic field uniformity optimization. According to the method, the quantization result of signal interference is obtained through the obtained signal interference parameters, whether signal interference optimization is carried out or not is judged, if yes, the magnetic field uniformity test is carried out after the signal interference optimization is qualified, otherwise, the magnetic field uniformity test is directly carried out, and the uniformity influence parameters are obtained; and obtaining a magnetic field uniformity influence coefficient in combination with the obtained uniformity influence parameter, judging whether magnetic field uniformity optimization is carried out or not, if so, carrying out high-frequency test after the magnetic field uniformity optimization is qualified, otherwise, directly carrying out high-frequency test, thereby improving the high-frequency test accuracy. The problem of low high-frequency test accuracy caused by sample position deviation in the prior art is solved.

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.

Techniques for resolving a surface roughness effect with a GPU-accelerated NMR simulation include identifying, with a graphics processing unit (GPU), a segmented micro-CT image input as a computational domain; assigning, with the GPU, a plurality of random walkers into pore voxels of the segmented micro-CT image; initiating, with the GPU, a random walk numerical simulation with the plurality of random walkers; moving, with the GPU, each random walker of the plurality of random walkers from a previous position to a new position; determining, with the GPU, the new position of each random walker; and updating, with the GPU, an NMR relaxation rate to resolve a surface roughness effect based on the new position of each random walker.

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.

The invention relates to the technical field of material physical property testing, in particular to a ferromagnetic resonance linewidth automatic testing system and method, and the system comprises a main control unit, a signal generator, a spectrum analyzer, a magnetic field generation device, a gauss meter, a microwave transmission structure and two attenuators. The signal generator, the spectrum analyzer, the magnetic field generation device and the gauss meter are electrically connected with the main control unit, one attenuator is connected between the signal generator and the microwave transmission structure, the other attenuator is connected between the microwave transmission structure and the spectrum analyzer, and a crystal oscillator synchronization line is connected between the spectrum analyzer and the signal generator. The method comprises the following steps of: scanning point by point to read the readings of a spectrum analyzer influenced by a sample under different frequencies and different magnetic field intensities, and performing data curve fitting according to three groups of data of the frequency, the magnetic field intensity and the power to obtain a ferromagnetic resonance line width result of the sample; the signal generator and the spectrum analyzer are cheaper than the network analyzer.

The invention discloses a mismatched image generation method and device based on a CEST image and a structural magnetic resonance image, and belongs to the technical field of magnetic resonance. According to the method, a mismatched image is obtained by using CEST data and corresponding structural magnetic resonance data. According to the method, various mismatched image data can be obtained by utilizing various CEST effect quantitative index images and various structural magnetic resonance data, the mismatched images can serve as new images capable of being quantitatively analyzed, iconography information for assisting clinical diagnosis is provided, and therefore the application of CEST imaging quantitative analysis is expanded.

This disclosure describes hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications.This disclosure describes methods for producing hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications.This disclosure describes precursor compounds for use in producing hyperpolarized materials for use in nuclear magnetic resonance, magnetic resonance imaging, or similar applications.

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 utility model provides an auxiliary positioning device of a magnetic resonance imaging quality detection phantom, which comprises a shell arranged on an ACR test body; the first gradienter is arranged on the shell and is used for detecting the levelness of the ACR test body in the axial direction after the ACR test body is put into the coil; the second gradienter is installed on the end face of the shell and used for detecting the levelness of the ACR test body in the circumferential direction after the ACR test body is placed into the coil; the scale assembly is installed on the end face of the shell and used for detecting the deviation between the central axis of the ACR test body and the central axis of the coil. By designing the auxiliary positioning device integrating the first gradienter, the second gradienter and the scale assembly, when the auxiliary positioning device is used for testing, the positioning accuracy of a test body can be improved, an operator can conveniently adjust the position of the test body, the time and energy for repeatedly adjusting the bubble gradienter can be saved, and the testing efficiency is improved. Meanwhile, due to the universal design, the shell can be suitable for ACR tests of different coils.

To provide an NMR probe head with a coil structure capable of reducing an electric field generated within a sample during operation.SOLUTION: At least one receiving / transmitting coil 1 for generating a high frequency B1 magnetic field has conductor portions 2a and 2b and a connection region 4. The conductor portions have a forward winding portion and a backward winding portion. The forward winding portion has forward windings 3a and 3b, and extends from the connection region 4 as a starting point to axial ends 5a and 5b of the receiving / transmitting coil 1 in a predetermined winding direction. The backward winding portion has backward windings 6a and 6b, and extends from the axial ends 5a and 5b of the receiving / transmitting coil 1 as starting points to the connection region 4 in the same winding direction. The windings of the backward winding portion have a pitch P of an opposite sign to the windings of the forward winding portion.SELECTED DRAWING: Figure 1a

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.

Aspects relate to providing radio frequency components responsive to magnetic resonance signals. According to some aspects, a radio frequency component comprises at least one coil having a conductor arranged in a plurality of turns oriented about a region of interest to respond to corresponding magnetic resonant signal components. According to some aspects, the radio frequency component comprises a plurality of coils oriented to respond to corresponding magnetic resonant signal components. According to some aspects, an optimization is used to determine a configuration for at least one radio frequency coil.

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.

According to some aspects, a device configured to be coupled to a portable magnetic resonance imaging (MRI) device is provided, the device comprising at least one light source arranged to, when operated, project a visible boundary around at least a portion of the portable MRI device, wherein the visible boundary demarcates a region within which a magnetic field strength of a magnetic field generated by the portable MRI device equals or exceeds a threshold. The at least one light source may be arranged such that an angle of the at least one light source relative to the portable MRI device is adjustable and wherein adjusting the angle of the at least one light source relative to the portable MRI device changes a shape and / or size of the visible boundary.

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.

Techniques for reel-to-reel assessment of a high-temperature superconducting (HTS) tape are provided. The techniques include a cryocooler-powered cryogenic system configured to cool the HTS tape in a background magnetic field. The cryocooler-powered cryogenic system may be free of liquid cryogenic. The cryocooler-powered cryogenic system may include a measurement zone, where the magnetic field is perpendicular to the path of the HTS tape. The techniques may also include a Hall sensor array within the measurement zone. The Hall sensor array may be configured to scan a magnetic field at a surface of the HTS tape to measure a screening-current-induced field and separate it from the background magnetic field. The techniques may also include a data acquisition (DAQ) module operably coupled to the Hall sensor array. The DAQ module may be configured to oversample Hall voltages.

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.