145 results about "Conventional ultrasound" patented technology

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.

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.

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 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 provides an ultrasonic breaking method for animal tissue in chromatin co-immunoprecipitation. The ultrasound breaking method comprises the steps as follows: firstly, adding a mixture of a collagenase solution and a DPBS solution at a proportion of 1:1 into animal tissue for an experiment; shaking for digesting the animal tissue at the temperature of 37 DEG C; centrifugalizing; removing supernatant fluid; performing conventional ultrasound breaking. The ultrasound breaking method can better acquire a DNA-protein compound segment with a proper size, and a foundation is laid for the success of the whole ChIP experiment.

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 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.

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.