92 results about "Ultrasound method" patented technology

Ultrasound probes, ultrasound systems, and ultrasound methods with pressure measurement capabilities for detecting and determining if bodily tissue is over-compressed during ultrasound imaging procedure. An ultrasound probe can include a probe body, an articulating probe head attached to the probe body, and a pressure-sensing device housed in an articulating area between the articulating probe head and the probe body. A method can include placing the articulating probe head of the ultrasound probe on a skin surface of a patient and moving the articulating probe head of the ultrasound probe over the patient while ultrasound signals are emitted into the patient from the articulating probe head. The method can also include monitoring for measured pressure values induced on the patient by the articulating probe head to determine whether a threshold pressure value has been exceeded.

The invention relates to the technical field of material mechanical property testing, in particular to a method for measuring residual stress of a metal component. According to the technical scheme, the method for measuring the residual stress of the metal component comprises a working process for measuring the residual stress of the metal component; according to the method, a technical path of multi-modal data assimilation is adopted, and a mechanical release mechanism of a drilling method and an ultrasonic stress measurement technology are deeply fused to calibrate and correct mass sound velocity data obtained by carrying out rapid ultrasonic scanning on the whole component on site, so that the precise measurement of the residual stress state of the metal component is realized, and the measurement precision is improved. According to the method, data authority and high credibility of a drilling method in a key area are reserved, the advantages of high efficiency and wide coverage of full-field measurement of an ultrasonic method are brought into full play, and efficient and accurate stress information is provided on the premise that components are not excessively damaged.

Methods and apparatuses for using intravascular ultrasound in combination with aspiration to remove intraluminal obstructive material (e.g., thrombus / clot material). These methods and apparatuses may allow the removal of intraluminal obstructive material embodiments using an integrated intravascular ultrasound transducer arrays that is arranged to enhance imaging of both target clot material and a zone of aspiration based on the position and orientation of the aspiration orifice.

The invention relates to the technical field of nondestructive testing of engine blades, and discloses an in-service in-situ electromagnetic acoustic detection system and method for aero-engine blades, which adopt an integrated design of an array eddy current sensor and an array surface wave sensor, ensure that dangerous cracks exposed out of a blade tenon can be reliably detected by an eddy current method, and meanwhile, improve the detection accuracy of the blade tenon. The internal fatigue damage can also be detected by an ultrasonic method, so that the engineering application problem that the embedded fatigue crack of the blade tenon of the aero-engine cannot be effectively detected in situ is solved.

The invention provides a spinel type ferrite composite material with high-performance microwave absorption and a preparation method thereof, and relates to the technical field of microwave absorption ferrite materials. According to the composite material, spinel type ferrite such as Ni < 0.4 > Zn < 0.4 > Me < 0.2 > Fe < 1.94 > Cr < 0.01 > O < 4 > (Me = Mg, Co, Ni, Cu and Zn) is used as a substrate material, the substrate material is compounded with a carbon nano tube with the mass fraction of 6.5 wt% to obtain the composite material, and the finally obtained Ni < 0.4 > Zn < 0.4 > Cu < 0.2 > Fe < 1.94 > Cr < 0.01 > O < 4 > / 6.5 wt% CNTs show good microwave absorption performance and have a smaller microwave absorption peak and a thinner impedance matching thickness compared with other microwave absorbents. The preparation method comprises a solid phase method and an ultrasonic method, and is low in cost, simple to operate and short in preparation period. The prepared composite material has good wave-absorbing performance and has a wider application prospect.

The invention discloses a preparation method and application of a dual-targeting carrier-free delivery system for enhancing anti-tumor immunity of NKT cells, Lys-alpha-GalCer is used as a raw material, and two molecules of LGC are connected through a disulfide bond to synthesize an amphiphilic LGC-SS-LGC micromolecule prodrug; the LGC-SS-LGC micromolecule prodrug is prepared into vesicles internally loaded with an NKT cell antigen presenting molecule CD1d and externally modified with polysarcosine through electrostatic adsorption through a film dispersion-probe ultrasonic method, finally a CD1d / LGC-SS-LGC / PSar dual-targeting carrier-free delivery system is formed, and the dual-targeting carrier-free delivery system can be used for liver cancer treatment after intravenous administration. In addition, the compound can be used for preparing a preparation for enhancing NKT cell Th1 type immune response. The dual-targeting carrier-free delivery system prepared by the invention can directly or indirectly enhance the anti-tumor immune effect of the NKT cells, and has a dual-synergistic effect.

The invention discloses an iron-carbon modified zirconium oxide composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of wastewater treatment. According to the preparation method, firstly, waste nitrogen-containing biomass is used for replacing chemical reagents such as ethylenediamine to serve as raw materials to prepare carbon quantum dots (CQDs), and then Fe and CQDs are loaded on amorphous phase ZrO2 through a simple ultrasonic method. According to the preparation method disclosed by the invention, the stability of ZrO2 is retained, and meanwhile, the photo-response range of the composite material is successfully extended by utilizing common modification of Fe and CQDs, oxygen vacancies (OVs) in the material are further increased, the separation of photo-induced electrons and holes is promoted, and the service life of interface carriers is prolonged, so that the photocatalytic performance of the composite material is remarkably improved. The high adsorption affinity of ZrO2 to glyphosate is utilized, and regulation and control of Fe and CQDs on hole electron pair separation and compounding are combined, so that the ZrO2, the Fe and the CQDs achieve a synergistic interaction effect, the goals of synergistic adsorption / photocatalytic degradation of glyphosate and reutilization are achieved, and the application of ZrO2 in the field of photocatalytic degradation of organic pollutants is expanded.

Methods and systems are disclosed for employing an ultrasonic sensor to estimate a range for a moving object. At least one processor separates returned signals received by an ultrasonic transducer into a stationary object signal and a moving object signal. A gain is determined based at least in part on the stationary object signal. The stationary object signal is combined with the moving object signal using the gain and then filtered. The range for the moving object is estimated using the filtered combined stationary and moving object signal.

Methods and apparatuses for enhancing local features in ultrasound images are disclosed. In some embodiments, an ultrasound system includes an ultrasound scanner configured to transmit ultrasound at a patient anatomy and receive reflections of the ultrasound from the patient anatomy and a processor. The processor is configured to: generate an ultrasound image based on the reflections and system parameters of the ultrasound system; determine a region of interest (ROI) in the ultrasound image; determine an enhancement property for the ROI; adjust at least one of the system parameters; and generate, based on the at least one of the system parameters being adjusted, a ROI image having the enhancement property enhanced compared to the ROI in the ultrasound image. The ultrasound system also includes a display device configured to simultaneously display the ultrasound image and the ROI image.

Systems, devices, and methods for sparse synthetic aperture ultrasound (SSAU) imaging and / or range-Doppler applications are described. An example method for SAU imaging includes receiving, via a user interface, an input including an array topology comprising a particular N-dimensional arrangement of a plurality of transducer elements of the SAU system, an objective space, a function characterizing an imaging capability of the SAU system, and one or more constraints, generating, based on the input, an acoustic field over the objective space for each of the plurality of transducer elements of the array topology, selecting one or more transducer elements from the plurality of transducer elements of the array topology based on evaluation of the function, and providing for display, on the user interface, the selected one or more transducer elements that satisfy each of the one or more constraints.

An ultrasound method for perfusion monitoring comprising following steps: obtaining ultrasound signals of biological tissue; extracting from the ultrasound signals corresponding ultrasound blood signals originating from moving red blood cells; determining an intensity of the ultrasound blood signals; determining an intensity distribution of the ultrasound blood signals; determining a current perfusion parameter value representative for perfusion in the biological tissue based on the determined intensity distribution of the ultrasound blood signals; estimating a reference perfusion parameter value representative for perfusion in the biological tissue in a normal state based on at least one reference intensity distribution of the ultrasound blood signals; determining at least one critical perfusion parameter threshold based on the reference perfusion parameter value; and iteratively monitoring perfusion in the plurality of blood vessels by comparing the current perfusion parameter value with the at least one critical perfusion parameter threshold.

The invention discloses a Cu 2‑x The S / Graphene composite wave absorbing material and the preparation method thereof include: mixing a sulfur-containing precursor solution and a copper source, and washing the sample by centrifugation to prepare a CuS dispersion; preparing a graphene organic stripping solution by ultrasonic method; mixing the graphene organic stripping solution with the CuS dispersion solution in a certain proportion, and adding a guest cation Cu 2+ and reducing agent, centrifuge and wash to obtain Cu 2‑ x S / Graphene composite absorbing material, in which Cu 2‑x S particles are uniformly attached to the monolayer 2D Graphene, where Cu 2‑x The mass ratio of S to Graphene is 1:(0.01-0.15), and the value range of x is 0≤x≤1, so as to meet the requirements of "thin, light, wide and strong" for the absorbing material.

A computer-implemented method of automatically identifying a reference vessel in an ultrasound image, the method comprising: segmenting the image to identify an organ; locating a predetermined anatomical landmark specific to the organ; identifying appropriate vasculature for the organ; and selecting a reference vessel from the vasculature that has a size within a predetermined size range and a location with a predetermined distance range from the predetermined interface.

A method of producing cytopathologic cell samples, the method including insonating a target tissue by ultrasound energy with a focused beam at that generates shear waves within the tissue. A method of producing cytopathologic cell samples, the method including insonating a target tissue by ultrasound energy at a first intensity level during a first period, insonating the target tissue by ultrasound energy at a second intensity level during a second period, wherein the first intensity level is higher than the second intensity level. Related apparatus and methods are also described.

The invention relates to the technical field of ovarian cancer cell membrane modification, and discloses an ovarian cancer cell membrane modified co-loaded DOX / IND nanoparticle and a preparation method thereof.The ovarian cancer cell membrane modified co-loaded DOX / IND nanoparticle comprises IND, DOX and ID8 cell membranes, and the preparation method comprises the following steps that 1, DOX / IND (at) cmLPs is prepared, a film dispersion ultrasonic method and an ammonium sulfate gradient method are adopted for constructing a co-loaded DOX / IND liposome, and the liposome is used for preparing the ovarian cancer cell membrane modified co-loaded DOX / IND nanoparticle; the method comprises the following steps: (1) preparing an ovarian cancer cell membrane by adopting a gradient centrifugation method, (2) preparing the ovarian cancer cell membrane by adopting a gradient centrifugation method, (3) preparing ovarian cancer cell membrane fused Indoximod and DOX co-loaded lipidosome (DOX / IND (at) cmLPs), and (4) detecting and verifying the characterization of the DOX / IND (at) cmLPs. According to the ovarian cancer cell membrane modified co-loaded DOX / IND nanoparticle and the preparation method thereof, a liposome co-loaded with DOX / IND is constructed by adopting a thin film dispersion ultrasonic method and an ammonium sulfate gradient method, the technical bottleneck of DOX / IND co-loading is solved through process optimization, and the ovarian cancer cell membrane modified co-loaded DOX / IND nanoparticle has the characteristics of high encapsulation efficiency, synergistic curative effect and intelligent release; a new thought is provided for combined treatment of drug-resistant tumors such as ovarian cancer.

A method of producing cytopathologic cell samples, the method including insonating a target tissue by ultrasound energy with a focused beam at that generates shear waves within the tissue. A method of producing cytopathologic cell samples, the method including insonating a target tissue by ultrasound energy at a first intensity level during a first period, insonating the target tissue by ultrasound energy at a second intensity level during a second period, wherein the first intensity level is higher than the second intensity level. Related apparatus and methods are also described.

The invention discloses a composite exosome encapsulating linear macromolecular nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of biological materials and regenerative medicine. Aiming at the pain points that in the prior art, when linear macromolecules such as collagen and hyaluronic acid are encapsulated by exosomes, the encapsulation efficiency is low, the structure of the exosomes is easy to damage, and the molecular weight adaptability is poor, the invention provides the preparation method which comprises the following steps: firstly, pretreating the collagen of 5 kDa to 330 kDa and the hyaluronic acid of 10 kDa to 2200 kDa into dense nanoparticles of 10 to 150 nm and PDI less than or equal to 0.15 through a nanoprecipitation method, an electrostatic complexation method and the like; and encapsulating in the exosome through an electroporation method, a freeze-thaw cycle method or an ultrasonic method, and purifying to obtain the composite exosome. According to the method, linear macromolecules with different molecular weights are adapted by flexibly adjusting process parameters, the encapsulation efficiency is remarkably improved, and the membrane structure of the exosome can be kept complete. The obtained composite exosome has the signal transduction function of the exosome and the biological activity of linear macromolecules, and generates a synergistic effect in tissue repair.

Ultrasound methods and systems for measuring physiological properties are disclosed. The ultrasound methods and systems measure one or more characteristics of a vessel, such as vessel-wall displacement over time or blood-flow velocity over time, based on a pulse wave propagating through the vessel. In aspects, the characteristics are measured at two locations of the same vessel with a known distance between the two locations. A time shift between the measured characteristics at the two locations is calculated and used, along with the known distance, to determine one or more physiological properties, such as pulse-wave velocity or blood pressure. These physiological properties can be measured without the assistance of ECG data.

The application discloses a cellulose-based composite material for simultaneously removing copper and tetracycline from water bodies and a preparation method thereof, and belongs to the technical field of environmental functional composite materials. The cellulose-based composite material is Zr-MOF / CNF, and the specific preparation steps include the following steps: first, a zirconium (Zr)-based MOF is prepared by using an ultrasonic method; then, nanocellulose is prepared by using a TEMPO oxidation method; and finally, the obtained white suspension liquid is mixed under ultrasonic assistance, centrifuged, washed with water and washed with alcohol, so as to obtain a Zr-MOF / CNF composite material. The material is synthesized by using the ultrasonic method, the preparation process is simple, the raw material cost is low, and the problems of the cellulose, such as the lack of a porous structure, the MOF particle agglomeration and the poor water stability, are improved, and the practical application capability of the Zr-MOF / CNF is improved. The cellulose-based composite material can effectively adsorb copper and tetracycline, when the initial concentrations of the copper and the tetracycline are 32 mg / L and 444 mg / L respectively, and the initial solution pH is 7.0, the adsorption capacities of the Zr-MOF / CNF for the copper and the tetracycline are 157.08 mg / g and 1532 mg / g respectively.

The invention discloses a self-assembled polypeptide for loading multiple traditional Chinese medicine components, a magnolia flower multi-component delivery system prepared from the self-assembled polypeptide and application of the magnolia flower multi-component delivery system in treatment of allergic rhinitis. The self-assembled polypeptide is synthesized firstly, and then the magnolia flower multi-component delivery system is prepared through stirring in combination with a probe ultrasonic method. According to the self-assembled polypeptide IIFFSSKKGE-Dopa disclosed by the invention, through construction of a nasal cavity delivery system FCSP and NFs, co-loading of traditional Chinese medicine components such as desmogenin and eudesmol can be realized, and the nasal cavity residence time of volatile oil components such as eudesmol and indissolvable components such as desmogenin is effectively prolonged. Meanwhile, the FCSP (at) NFs overcomes a mucous cilia removal barrier, a physical protection net is formed in the nasal cavity, allergens are effectively intercepted, nasal mucosa damage is relieved, and the treatment effect on allergic rhinitis is improved.

A system and method for human heart modelling to create a dynamic virtual model of heart that can be used for diagnosis and determining suitable therapy. The dynamic virtual model can be created using 2D or 3D echo images or video clips obtained from ultrasound reversal wave data. Arbitrary pixels or voxels in the echo images are tracked phase-by-phase per cardiac cycle. From this, original reversal wave equation ρp attached to the arbitrary pixel or voxel is obtained. Then is generated a deformable map fp with an equation of curve passed from the arbitrary pixel or voxel within the cardiac cycle determined by solving Lagrange-Euler equations. Finally, new 2D or 3D images with improved spatial resolution can be obtained that are used for the human heart modelling.

The invention provides a particle size detection method of silica powder. The particle size detection method comprises the following steps: carrying out surface modification on the silica powder by adopting a silane coupling agent containing a polyethylene glycol chain segment, and carrying out particle size detection on the surface-modified silica powder. After the silane coupling agent containing the polyethylene glycol chain segment is adopted to perform surface modification on the silica powder, and a long-chain hydrophilic chain segment is chemically grafted on the surface of the silica powder, the silica powder obtains self-emulsifying dispersing capacity, and the dispersity and stability of the silica powder in dispersion liquid are greatly improved. Compared with an ultrasonic method, an external emulsification method and the like, the influence of external factors such as a sampling mode and an ultrasonic condition on the particle size detection result measured by the method is greatly reduced, and the test result is more accurate and stable.

Methods and systems are disclosed for employing an ultrasonic sensor to estimate a range for a moving object. At least one processor separates returned signals received by an ultrasonic transducer into a stationary object signal and a moving object signal. A gain is determined based at least in part on the stationary object signal. The stationary object signal is combined with the moving object signal using the gain and then filtered. The range for the moving object is estimated using the filtered combined stationary and moving object signal.

Disclosed herein are ultrasound probes, ultrasound systems, and ultrasound methods with pressure measurement capabilities for detecting and determining if bodily tissue is over-compressed during ultrasound imaging procedure. For example, an ultrasound probe can include a probe body, an articulating probe head attached to the probe body, and a pressure-sensing device housed in an articulating area between the articulating probe head and the probe body. In another example, a method of the ultrasound probe includes placing the articulating probe head of the ultrasound probe on a skin surface of a patient and moving the articulating probe head of the ultrasound probe over the patient while ultrasound signals are emitted into the patient from the articulating probe head for ultrasound imaging. The method also includes monitoring for any measured pressure values induced on the patient by the articulating probe head of the ultrasound probe in excess of a threshold pressure value.

This invention relates to the field of non-destructive testing technology in building engineering, and discloses a comprehensive method for testing concrete strength based on the rebound method and ultrasonic method. The method includes: acquiring the full-wavelength ultrasonic signal of the test area and calculating the propagation velocity; performing a rebound impact in the test area to obtain the rebound value and acceleration sequence, analyzing and defining the impact contact time and calculating the initial energy absorption ratio; mapping the impact contact time to a cutoff frequency, and performing frequency band integration on the full-wavelength ultrasonic signal to obtain the dispersion attenuation coefficient; comparing the dispersion attenuation coefficient with a scattering threshold, and establishing the initial energy absorption ratio or pure mortar phase characteristics as a mechanical feature set based on the results; converging the propagation velocity, rebound value, impact contact time, dispersion attenuation coefficient, and mechanical feature set to construct an initial comprehensive state matrix; extracting orthogonal principal component latent variables from this matrix and performing quantized superposition to output the concrete compressive strength. This invention eliminates parameter multicollinearity and improves detection accuracy by establishing a physical correlation between mechanical impact and the ultrasonic frequency domain.

This invention discloses a non-contact laser-ultrasound method and system for detecting internal defects in high-entropy alloys. The method first pre-treats the surface of the high-entropy alloy sample, then adaptively adjusts the laser pulse parameters according to the thermal conductivity characteristics of the high-entropy alloy to excite internal ultrasonic waves via thermoelastic effects. After non-contact signal reception using a laser interferometer, signal pre-processing is performed using a wavelet packet transform and principal component analysis fusion algorithm. Defect features are then extracted using a local outlier factor and support vector machine fusion algorithm to distinguish between defects and lattice distortion interference signals. Defect parameters are analyzed using an improved ultrasonic propagation model, combining mechanical parameters and lattice distortion coefficients. Finally, cross-validation and error correction ensure detection accuracy. The system comprises seven modules, including sample pre-processing, laser excitation, and ultrasonic reception, with a main control module coordinating the collaborative work of each module. This invention achieves non-contact detection, improving detection adaptability and accuracy, and enabling automated batch online detection.

The application provides a preparation method of a silver-copper ferrite-iron-based metal organic framework composite material, and comprises the following steps: step S1, a copper ferrite material is prepared by improving a pH value and a hydrothermal temperature and by adding different additives through a modified solvothermal method; step S2, an iron-based metal organic framework material is prepared by improving a pH value and stirring conditions at room temperature through a sol-gel method; step S3, a heterostructure is formed by combining the copper ferrite material and the iron-based metal organic framework material through an ultrasonic method, so that a copper ferrite-iron-based metal organic framework composite material is obtained; and step S4, a silver quantum dot is photo-deposited on the surface of the copper ferrite-iron-based metal organic framework composite material through a photo-deposition method, so that a silver-copper ferrite-iron-based metal organic framework composite material is prepared. The silver-copper ferrite-iron-based metal organic framework composite material prepared by the application can be used for removing oxygen-containing acid salt pollutants in drinking water, such as nitrate, bromate and chlorite, and has a wide application prospect.

This invention discloses a Co 0.2 Cd 0.8 This paper describes the preparation method of S / CaTiO3 / NiSx materials and their application in photocatalytic nitrogen fixation, belonging to the field of photocatalytic materials technology. Firstly, an S-type heterostructure Co was prepared using an ultrasonic method. 0.2 Cd 0.8 S / CaTiO3 composite, then using ultrasound to bond metalloid NiS x Nanoparticle co-catalysts and Co 0.2 Cd 0.8 S / CaTiO3 complex forms Co 0.2 Cd 0.8 S / CaTiO3 / NiS x Ternary composite photocatalyst. The semiconductor Co in this invention... 0.2 Cd 0.8 S and semiconductor CaTiO3 first form an S-type heterostructure, which not only accelerates the directional movement and separation of photogenerated electrons and holes, but also maintains the strong redox capability of photogenerated charge carriers; in addition, NiS is loaded onto the S-type heterostructure. x co-catalyst, NiS x Nanoparticle co-catalysts, acting as electron-capturing centers, can not only provide more reactive sites but also further improve charge separation efficiency.

The invention discloses a NiO / MoS2 / rGO material as well as a preparation method and application thereof, a NiO / MoS2 / rGO composite material is prepared by adopting an ultrasonic method on the basis of MoS2 / rGO, and a NiO / MoS2 / rGO / GCE electrochemical sensor for MP detection is constructed by the synthesized NiO / MoS2 / rGO composite material, so that sensitive and efficient detection of MP is realized.

The invention relates to the technical field of aero-engine split casing notch prediction, in particular to a residual stress-based ring axial notch distortion prediction method and a residual stress-based ring axial notch distortion prediction model. Comprising the following steps: performing residual stress detection on inner and outer ring surfaces of a ring piece by adopting a blind hole method / ultrasonic method / contour method and the like; calculating the bending moment of the ring piece; calculating an unloading bending moment; calculating stress change after unloading; calculating the angle change after unloading; calculating the distance change after unloading; according to the invention, the incision distortion amount can be accurately predicted in advance; efficiency is improved, the research and development cycle is shortened, and repeated trial cutting is not needed; according to a traditional method, notch distortion needs to be verified through multiple machining tests, and a large amount of time and materials are consumed; direct calculation is carried out through a theoretical model, and the trial and error cost is greatly reduced.