146 results about "Conventional ultrasound" patented technology

An ultrasound imaging catheter system includes a pivot head assembly coupled between a ultrasound transducer array and the distal end of the catheter. The pivot head assembly includes a pivot joint enabling the transducer array to pivot through a large angle about the catheter centerline in response pivot cables controlled by a wheel within a handle assembly. Pivoting the ultrasound transducer array approximately 90° once the catheter is positioned by rotating the catheter shaft and bending the distal section of the catheter, clinicians may obtain orthogonal 2-D ultrasound images of anatomical structures of interest in 3-D space. Combining bending of the catheter by steering controls with pivoting of the transducer head enables a greater range of viewing perspectives. The pivot head assembly enables the transducer array to pan through a large angle to image of a larger volume than possible with conventional ultrasound imaging catheter systems.

A method and system is provided for enhanced ultrasonic detection and imaging of small defects inside or at the surface of an object. The Synthetic Aperture Focusing Technique (SAFT) has been used to improve the detectability and to enhance images in conventional ultrasonics and this method has recently been adapted to laser-ultrasonics. In the present invention, an improved version of the frequency-domain SAFT (F-SAFT) based on the angular spectrum approach is described. The method proposed includes temporal deconvolution of the waveform data to enhance both axial and lateral resolutions, control of the aperture and of the frequency bandwidth to improve signal-to-noise ratio, as well as spatial interpolation of the subsurface images. All the above operations are well adapted to the frequency domain calculations and embedded in the F-SAFT data processing. The aperture control and the spatial interpolation allow also a reduction of sampling requirements to further decrease both inspection and processing times. This method is of particular interest when ultrasound is generated by a laser and detected by either a contact ultrasonic transducer or a laser interferometer.

An example ultrasound device, such as a transducer array, includes a plurality of ultrasound transducers, each ultrasound transducer having a first electrode, a second electrode, a thin piezoelectric film located between the electrodes, and a substrate supporting the plurality of ultrasound transducers. In some examples, the electrode separation is less than 10 microns, facilitating lower voltage operation than conventional ultrasound transducers.

Devices and method are provided for ultrasound transmission without the need for external couplants, such as gels, which are typically used in conventional ultrasound procedures. In particular, ultrashields are provided for use with ultrasound probes, wherein the ultrashields have specialized layers to provide an uninterrupted pathway of acoustic conductance from the probe to the surface of the body throughout the procedure while introducing minimal to no attenuation of ultrasound wave transmission. In addition, combinations of ultrashields and probe covers are provided to provide additional features such as a microbial barrier.

The invention relates to a judging method of an incompactness defect in a node of a concrete structure by detection by an ultrasonic method. On the basis of the traditional method for detecting the concrete defect by the ultrasonic method, besides an acoustic velocity and a head wave amplitude, two variable acoustic parameters, namely a complex frequency difference and a cross-correlation coefficient, are added; each acoustic parameter is processed into an acoustic parameter judging factor and each acoustic parameter judging factor is processed into a normalized comprehensive acoustic parameter judging factor; a position detecting chromatogram is drawn out according to the comprehensive acoustic parameter judging factor; and the position and range of a suspicious defect are determined according to a red area in the chromatogram. By the method, the compactness quality distribution of concrete can be directly and accurately described; errors and judgment loss caused by adoption of a single acoustic parameter for judgment can be avoided or reduced; and the difficulty in final judgment when the judgment result of the single acoustic parameter is inconsistent is also avoided. The judging method can be widely applied to the judgment of the incompactness defect in the node of the concrete structure or other complex structures.

The invention relates to a reversing image three-dimensional (3D) scene reconstruction method and system. The invention discloses the following steps that (S100) continuous multi-frame images at the rear part of a vehicle are acquired, and the characteristic points of each frame of image are extracted; (S200) the characteristic points of adjacent two frames of images are tracked and matched; (S300) for the characteristic points which are matched successfully, the coordinates of the corresponding points of the two characteristic points in a space are computed through an outer-pole geometrical principle; two 3D reconstruction images without absolute scale of view are obtained; and (S400) steps S100 to S300 are repeated and the 3D reconstruction of the continuous multi-frame images without absolute scale is completed. According to the reversing image 3D scene reconstruction method and the system, the problem that a blind area is produced when a traditional ultrasonic reversing system meets a small obstacle and the problem of the sense of distance of a traditional video 2D reversing image system are solved, a moving object behind the vehicle can be extracted in real time so as to give key alarm, provide clearer and more accurate visual feedback to a user, and improve the safety in reversing. In addition, the whole system can be based on existing hardware equipment, a technology is mature, the cost is low, and large-scale popularization and use are facilitated.

An imaging system comprises a device to excite mechanical waves in elastic tissue, a device for measuring the resulting tissue motion at a plurality of locations interior to the tissue at a number of time instances, a computing device to calculate the mechanical properties of tissue from the measurements, and a display to show the properties according to their location. A parameter identification method for calculating the mechanical properties is based on fitting a lumped dynamic parametric model of the tissue dynamics to their measurements. Alternatively, the mechanical properties are calculated from transfer functions computed from measurements at adjacent locations in the tissue. The excitation can be produced by mechanical vibrators, medical needles or structures supporting the patient. The measurements may be performed by a conventional ultrasound imaging system and the resulting properties displayed as semi-transparent overlays on the ultrasound images.

The invention discloses a photoacoustic imaging device based on graphene and an imaging method of the photoacoustic imaging device. A photoacoustic imaging probe of the photoacoustic imaging device is manufactured by adhering a graphene membrane onto the surface of a prism; the upper surface of the graphene membrane is adhered to a water tank for containing water; an imaging sample is placed in the water tank; detection light is focused to the imaging sample in the direction of a total reflection angle, and the imaging sample is excited by exciting light to generate a photoacoustic signal; the graphene membrane has a light polarization absorption characteristic, a balance detector is adopted to receive polarized light s and polarized light p which are modulated by the photoacoustic signal after being reflected. By adopting an action mode that graphene has different reflection rates to two polarized light near the total reflection angle, wide-band photoacoustic signals which cannot be detected by a conventional ultrasonic transducer can be detected; the photoacoustic imaging device is simple in system and convenient to minimize, and rapid photoacoustic imaging of a large-scale sample can be conveniently achieved through an integration array.

The invention provides a device and a method for nondestructively testing an axial stress of a concrete member based on a nonlinear ultrasonic harmonic wave method. The method comprises the steps of through calibrating an initial nonlinear coefficient beta 0 and coefficients m and n of the concrete member, detecting an acoustic parameter nonlinear coefficient beta of an ultrasonic wave in the concrete member, and solving an inner axial stress sigma of a concrete structure. The concrete stress detection method provided by the invention has special sensitivity on disclosing concrete early-stagecrack and stress evolutionary characteristics, and solves the problem that a traditional ultrasonic wave method is insensitive to an early-stage stress. A detected result is verified, the accuracy ishigher, an error requirement in actual engineering can be met, and the structure member cannot be damaged during a detection process.

Provided herein are devices and methods for mounting variously configured medical imaging probes for imaging applications. In one aspect, a holding device allows for interfacing / holding most conventional ultrasound probes such that the probes may be attached to a positioning device using a common interface. As ultrasound probes come in various sizes and lengths, the device may adjust to different lengths, widths and shapes of different probes. Hence, the device may work in a substantially universal manner while securely holding probes with little wobble or other problems.

The invention discloses a rapid super-resolution blood flow imaging method based on an ultrasound microbubble contrast agent. By means of the method, the problem of low blood flow imaging resolution caused by an ultrasonic diffraction limit is mainly solved, and meanwhile super-resolution imaging is accelerated. The method includes the steps that 1, the contrast agent is injected, and ultrasonic video is collected; 2, the video is pretreated, and noise and background tissue are inhibited; 3, moving correction is conducted on the pretreated video; 4, image interpolation is conducted; 5, the center of a microbubble is computed frame by frame by means of a microbubble matching filter; 6, the central position of the microbubble in all frames is recorded; 7, the occurrence frequency of the microbubble in each pixel is counted, and a blood flow super-resolution image is formed by means of gray value. According to the rapid super-resolution blood flow imaging method based on the ultrasound microbubble contrast agent, the blood flow super-resolution image with the resolution exceeding that of traditional ultrasound contrast is formed in short time, more abundant blood flow details are provided for a doctor, and the method assists the doctor in clinical diagnosis.

The invention relates to a material stress detection technology based on changes of the wavelength of supersonic waves, belonging to the field of nondestructive test. The principles of acoustic elasticity of supersonic waves are employed in the invention; i.e., propagation velocity c in a material is influenced by stress in the material to a certain extent, the propagation velocity c and wavelength v are directly proportional according to the equation of v=c / f when frequency f is constant, changes of wavelength can be acquired by detecting phases arriving at a same point through a same path, so changes of acoustic velocity can be acquired, and the variation amount of stress can be eventually acquired. Compared with traditional ultrasonic measurement methods for stress, the material stress detection technology provided by the invention has the advantages of high instantaneity of measurement, applicability to on-line detection and transient detection of stress, small dynamic errors and high measurement precision.

The invention relates to a surgery navigation method and system. The method includes: performing optical positioning on an ultrasonic probe with a configured optical marking part and a puncture needlewith a configured optical marking part; acquiring the ultrasonic imaging data collected by the ultrasonic probe in real time; generating the position and trajectory of the puncture needle in an ultrasonic image according to the optical positioning information and the ultrasonic imaging data. The system comprises a positioning module, an ultrasonic imaging data acquiring module, a puncture needletrajectory generating module and a display module. The surgery navigation method and system has the advantages that the puncture needle and the ultrasonic probe can be optically positioned, the position and trajectory of the puncture needle in the ultrasonic image collected by the ultrasonic probe can be displayed in real time, X-ray irradiation harm to doctors and patients can be eliminated, thedefects of unclear radiography and nonvisual guidance of traditional ultrasonic guidance are overcome, and the doctors can visually and efficiently master the puncture direction of surgery.

The present invention relates to an ultrasound imaging system (10) for inspecting an object (97) in a volume (40). The ultrasound imaging system comprises an image processor (36) configured to conduct a segmentation (80) of the object (97) simultaneously out of three-dimensional ultrasound mage data (62) and contrast-enhanced three-dimensional ultrasound image data (60). In particular, this may be done by minimizing an energy tem taking into account both the normal three-dimensional ultrasound image data and the contrast-enhanced three-dimensional image data. By this, the normal three-dimensional ultrasound image data and the contrast-enhanced three-dimensional image data may even be registered during segmentation. Hence, this invention allows a more precise quantification of one organ in two different modalities as well as the registration of two images for simultaneous visualization.

The invention relates to an ultrasonic field non-contact visualization method for nondestructive inspection and a device thereof. The method includes the steps: a to-be-detected object is placed in an effective area which can be scanned by a galvanometer scanning head; a detection area of the to-be-detected object is determined; a point on the to-be-detected object is selected as a receiving point for a laser interferometer to receive ultrasonic sound signals; a pulse laser instrument successively emits a pulse laser to each point in the detection area, so as to stimulate an ultrasonic wave at each point, and at the same time, the ultrasonic sound signals are received at the receiving point by the laser interferometer and are stored in a computer; according to a reciprocal theory, all-point sound signals which are transmitted to the detection area through stimulating the receiving point by the pulse laser instrument are obtained; and the each-point sound signal obtained by the computer corresponds to a position in the detection area model. Compared with the prior art, the method breaks through the bottleneck that a traditional ultrasonic probe needs to contact the to-be-detected object, achieves on-site nondestructive inspection, and has the advantages of high detection resolution, high bandwidth, high sensitivity and the like.

An example ultrasound device, such as a transducer array, includes a plurality of ultrasound transducers, each ultrasound transducer having a first electrode, a second electrode, a thin piezoelectric film located between the electrodes, and a substrate supporting the plurality of ultrasound transducers. In some examples, the electrode separation is less than 10 microns, facilitating lower voltage operation than conventional ultrasound transducers.

The invention relates to an ultrasonic detecting process of a marine steel-welding joint phased array, which is characterized by comprising the following steps of: a, preparing detecting equipment; b, removing splashes, rust and oil dirt on the surface of a detected object and in a probe moving zone and smearing coupling agents on the surface of the detected object and the probe moving zone; c, selecting a reflecting angle and a transmitting depth for scanning; d, inputting data or scanned images after scanning; e, analyzing scanned zones according to the detecting data or the scanned images; and f, evaluating the quality of welding joints. The invention can carry out no-damage welding joint detection and achieve the purpose of higher speed, precision, resolution and reliability than those of the prior art and fills the blank of the research application of a phased array technique in national marine industry; besides, the invention can be directly applied to the quality detection of submarine shells and aircraft engines for missiles, makes up the shortages of the traditional ultrasonic detection or forms the effective complementation with other detecting techniques and can ensure that the quality detecting process of a product tends to be more perfect, thereby enhancing the reliability of the product detecting technique.

The invention provides an ultrasonic ghost imaging method and device based on the principle of lens-free calorescence ghost imaging, which belongs to the field of target imaging detection. Ultrasonic wave emitted by an ultrasonic emission source is divided into two beams through an acoustic beam splitter. The ultrasonic wave transmitted through an object to be imaged is received by an ultrasonic wave barrel detector. An ultrasonic CCD detector is used to receive an ultrasonic beam emitted by the ultrasonic emission source. A correlator is used to calculate the second order correlation function of the ultrasonic sound intensity detected by two ultrasonic detectors. Coincidence measurement is carried out on two ultrasonic signals to acquire the image of the object to be imaged. According to the invention, the ultrasonic wave is introduced into ghost imaging as a wave source; a new ultrasonic ghost imaging method is realized; the imaging method has a great anti-perturbation characteristic; and compared with traditional ultrasonic imaging, the imaging method can realize lensless imaging, and has the advantages of high resolution, high image quality and the like.

The invention discloses a method for acquiring static operation pressure matching points of ultrasonic rapid jet flow of a jet wind tunnel. The method comprises the following steps: firstly calculating the initial opening of a pressure regulating valve at a lower threshold value of initial reference operation total pressure, then changing the opening of the annular gap pressure regulating valve in a stepped manner, obtaining nozzle outlet static pressure, test chamber reference point static pressure and stable section total pressure in real time through a pressure acquisition system, and then calculating the nozzle outlet Mach number and the test chamber reference point Mach number; after the nozzle outlet Mach number is stable, the moment when the nozzle outlet static pressure is the same as the test chamber reference point static pressure is found, and the stable section total pressure corresponding to the moment is the matching point operation total pressure; and if the matching point does not appear, the initial reference operation total pressure is adjusted and then searching is continued. According to the method for obtaining the static operation pressure matching point of the ultrasonic speed jet flow of the jet flow wind tunnel, the optimal operation pressure of the ultrasonic speed jet flow in a specific test state can be rapidly determined, and a traditional ultrasonic speed jet flow field uniform area is expanded to a jet flow boundary area from a rhombus area.

The invention discloses an intelligent positioning system and method for a spinal cord body surface puncture approach point based on a multi-mode medical fusion image, and belongs to the field of medical science. An ultrasonic technology is used for collecting spinal images in real time; a two-dimensional ultrasonic image and spatial position information corresponding to the two-dimensional ultrasonic image are obtained, and a three-dimensional ultrasonic reconstructed diaphragm is obtained through reconstruction; a spinal multi-mode medical image which is obtained through a non-ultrasonic mode is input into the system; then, through fusing, the fusion image is obtained. The fusion image can be used for puncture training or operation assistance. Based on an image processing technology, thetechnical weakness of a traditional ultrasonic imaging technology for spinal bony structure imaging is overcome; the defects of large puncture damage, radiation damage and step complexity and time consumption are overcome, and in clinical practical operation and simulation training, current spinal cord operations are pushed greatly.

A three-dimensional thermoacoustic imaging system uses dye markers. Thermoacoustic signals are produced by the dye markers when light from an external source is absorbed by the dye. Thermoacoustic images with and without dye stimulation may be generated using excitation frequencies both inside and outside the frequency band of fluorescence of the dye marker, and these may be combined, and / or combined with conventional ultrasound images for image enhancement. An apparatus for carrying out this method on mice, uses a commercially available array of transducers positioned opposite to the body of the mouse, which is immersed in a coupling media. A source of illumination such as a laser directs light to the mouse through the coupling media, and resulting acoustic waves are captured by the array and reconstructed to form an image.

The invention relates to a modified ultrasonic atomization warming method. The method is as follows: two or three parts of 'wind flow' warming, 'fog flow' warming and 'liquid to be atomized' warming are combined; individual warming temperatures are set at different heating positions according to the need; and the control on an ultrasonic atomization fog discharge temperature can be achieved through allocating and controlling the heat supply of heating units at all warming positions. By utilizing the modified warming method, the defect that the traditional ultrasonic atomization device only generates clod fog is overcome, and the design defect of the existing warming method is overcome. The novel warming ultrasonic atomization device can generate stable and thermostatic hot fog and can prevent components in an atomized liquid from being damaged by high temperature. The novel warming ultrasonic atomization device manufactured by the modified warming method mainly consists of an ultrasonic atomization part and a warming part, can generate good treatment and cosmetic effects, is simply manufactured and can be manufactured into a pocket-size portable device. The invention relates to the modified ultrasonic atomization warming method and the novel warming ultrasonic atomization device which can be used for medical health care and cosmetology.

The invention provides a mammary gland focus positioning method and device. The mammary gland focus positioning method splits the video sequences mainly based on mammary gland ultrasonic video sequence data, so as to process the video sequences into continuous image frame sequences, thus compared with a traditional ultrasonic image, increasing more information amount, and avoiding the condition that the sample is too good due to manual selection. Besides, the mammary gland focus positioning method adopts a deep learning method to train a model, so as to realize end-to-end positioning of test set data while the breast lesion area can be automatically detected, and then information of a subject is utilized to the maximum extent, and an effective auxiliary effect is provided for diagnosis ofdoctors, and the workload of the doctors is reduced.

The invention discloses an SOC PMUT suitable for high-density system integration, an array chip and a manufacturing method. The SOC PMUT suitable for high-density system integration realizes vertical stacking and monolithic integration of an SOC PMUT array and a CMOS auxiliary circuit thereof through direct bonding of an active wafer and a multi-channel metal wire structure in the vertical direction, and extends to a packaging layer through a TSV, so that the SOC PMUT does not need to be communicated with a CMOS through pressure welding blocks on the periphery of the array, the bottleneck of traditional ultrasonic transducer metal interconnection is relieved, the chip area occupied by the ultrasonic transducer metal interconnection is greatly reduced, meanwhile, the length of metal wiring is reduced, and the bad influence of the electrical parasitic effect caused by the length on the performance of an ultrasonic transducer array is reduced.

A three-dimensional thermoacoustic imaging system uses dye markers. Thermoacoustic signals are produced by the dye markers when light from an external source is absorbed by the dye. Thermoacoustic images with and without dye stimulation may be generated using excitation frequencies both inside and outside the frequency band of fluorescence of the dye marker, and these may be combined, and / or combined with conventional ultrasound images for image enhancement. An apparatus for carrying out this method on mice, uses a commercially available array of transducers positioned opposite to the body of the mouse, which is immersed in a coupling media. A source of illumination such as a laser directs light to the mouse through the coupling media, and resulting acoustic waves are captured by the array and reconstructed to form an image.

This invention discloses methods and apparatus for ultrasonic color imaging that characterizes ultra-fine structures and distributional physical conditions within the target under inspection. The disclosed complementarily incorporates information arising from a plurality of repeated sound trips forced by repeated reflections of exterior and interior interfaces of target, and expresses the information into an image segment representing the main path that ultrasonic signals traveled within the target. The image produced is substantially more discriminative, descriptive, and position-sensitive to both acoustic interfaces and distributional acoustic characteristics of the target. The invention is especially useful for thin sheet targets most vulnerable to both non-continuous and continuous interior defects. The continuous interior conditions and effects of ultra-thin layered structures, that traditional ultrasonic inspection has been unable to express, are effectively expressed by linking their effects of deforming the waveform of passing ultrasonic signals to color image details.

The invention relates to a high-concentration waste liquid treatment evaporator, which comprises a tank body, wherein a stirring shaft with stirring blades, and a liquid level detection device are arranged in the tank body; the stirring shaft is driven by a stirring motor at the top of the tank body; the liquid level detection device comprises a floating ball tube inserted into the tank body, a floating ball floating in the floating ball tube, a ruler tube which is mounted at the top end of the floating ball tube and is arranged outside the tank body, and a magnetic induction ruler mounted onthe outer side of the ruler tube; a magnetic block capable of moving up and down is arranged in the ruler tube; the magnetic block is connected with the floating ball through a connection rod; multiple groups of stirring blades are arranged up and down in a spacing manner; the stirring blades and the stirring shaft are mounted in an axial sliding manner. According to the high-concentration waste liquid treatment evaporator, by the adoption of a magnetic flap type liquid level detection device, the shortcomings that detection cannot be realized due to crystallization and a conventional ultrasonic liquidometer is inaccurate in detection due to stirring of internal liquid can be overcome; by the adoption of the stirring blades capable of floating up and down, the stirring resistance can be reduced in time, and the stirring effect is enhanced.

The invention discloses an ultrasonic positioning control system of an indoor ground transport cart and a control method of the system. The system includes an AGV control system and an upper computersystem. The upper compute system includes a man-machine interface and a processing module. The AGV system sets an integral environment map of an AGV and then an upper computer obtains an integral pathplanning through processing. The integral path planning is transmitted to the AGV control system through a communication system. Through integral coordination of an ultrasonic positioning system andan obstacle avoidance system, a main control single-chip microprocessor obtains a result through processing. The result is transmitted to a driver in a motor control system and the driver controls omnidirectional wheel to rotate. Therefore, safe operation of the AGV from one location to another location indoor is realized. With the omnibearing tracking ultrasonic positioning system, tracking and alignment of an ultrasonic emitter by a receiving device can be realized, positioning errors caused by wave drop can be solved and the positioning precision can be improved. Besides, omnibearing ultrasonic positioning and tracking can be realized, so that a problem of overlarge blind zones of traditional ultrasonic positioning systems are solved.