Ultrasonic system and method for measurement using shear wave

FIELD: medicine.

SUBSTANCE: system comprises an ultrasonic probe capable of sequentially transmitting a push pulse to generate a shear wave to each of a plurality of focal spots in the region under study, each of the plurality of focal spots has a mutually differing depth value; and receiving ultrasonic echoes adjacent to each of the plurality of focal spots; a shear wave detector that indicates the property of the generated shear wave in the focal spot and a property estimation means performed with a possibility to evaluate the second parameter, which indicates the property of the region under study, as a function of the first parameters extracted in a plurality of focal spots. The method for property measurement carried out using the system and its computer product.

EFFECT: expanded arsenal of tools to assess the mechanical properties of tissue.

15 cl, 5 dwg



Same patents:

FIELD: physics.

SUBSTANCE: invention relates to communication engineering and can be used by systems for acquiring information on a subject receiving elastic waves. An ultrasonic imaging device includes a probe (302), having a plurality of elements (301) arranged in a matrix, and converts received elastic waves into received signals; the device includes a first signal processing unit in which received signals are used to compute first output signals corresponding to elastic waves from a target location, a second signal processing unit in which first output signals for a target location are used to compute second output signals corresponding to elastic waves from the target location, and an image processing unit in which the second output signals are used to generate image data for display on an image reproducing device. One of the first signal processing unit and the second signal processing unit employs adaptive signal processing to compute first output signals or second output signals.

EFFECT: high accuracy of receiving information owing to high spatial resolution.

9 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: cylindrical receiving antenna of a circular scanning hydroacoustic station comprises receiving elements mounted on an extensible structure configured to unfold the antenna from a transportation position to a working position and back, arranged on a circle to form a cylindrical receiving array. The antenna structure in the working position is sound transparent; elements of the cylindrical receiving array are arranged on one circle and their number is determined by the expression Nopt=[1+N0d0/dopt], where Nopt is the number of elements of the cylindrical receiving array; N0 is the number of elements spread on the circle of the antenna by distance d0=c/2fmax; where c is the speed of sound in water; fmax is the upper operating frequency; dopt is the distance calculated using an iteration procedure, when each iteration step includes calculating the beam pattern of the compensated circle at frequency fmax for N0 elements.

EFFECT: simple antenna design and reduced weight and size thereof, significantly reducing the number of antenna receivers while maintaining the concentration factor thereof.

11 dwg

FIELD: physics.

SUBSTANCE: this receiver comprises sealed spherical case filled partially with fluid to the level corresponding to zero case buoyancy in working fluid. Two piezoelectric elements of hydrophone channel built around sealed polarised-in-opposition piezoelectric film inverters are secured outside said spherical case opposite each other. Two pairs of bimorphs incorporated with components (x, y) of vector channel and two pairs of bimorphs vector channel component (z) are built around sealed piezoelectric film inverters. Sensitivity axes of the latter make the orthogonal system of coordinates with origin aligned with the spherical case centre. All bimorphs of three-component vector channel are arranged outside said spherical case. Inner ends of every of the fourth pairs of resilient substrates are arranged at spherical case outer surface to allow bending oscillations of resilient substrate. Outer ends of every of the fourth pairs of resilient substrates are rigidly secured at outer sealed ring case with amplifiers fitted therein. Said ring case is arranged outside said spherical case while hydrophone channel amplifier input and inputs of amplifiers of said three vector channels are a differential design.

EFFECT: higher sensitivity of piezoelectric components, decreased noises, lower sensitivity of combined hydro acoustic receiver.

4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: bottom cable antenna for monitoring offshore seismoacoustic emission, comprising an underwater cable, hydrophone modules connected by the underwater cable through defined distances between each other, surface collection and conversion equipment connected to one end of the underwater cable, is provided with an anchor which is tied to the opposite end of the underwater cable, additional loads tied to the underwater cable between corresponding hydrophone modules and floating suspensions tied to the underwater cable to corresponding hydrophone modules, wherein the hydrophone modules are in the form of pressure inlets. Use of pressure inlets instead of two hydroacoustic antennae significantly reduces the cost of the bottom antenna and simultaneously solves problems associated with the quality of contact between the sensor and the ground by eliminating noise which accompanies said contact. Use of a large number of said sensors solves the problem of picking up waves of different polarisation based on kinematic characteristics thereof.

EFFECT: high noise-immunity by preventing dragging of the antenna on the ground.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: acoustic receivers are mounted on the outer surface of sound transparent envelopes made of elastic material, wherein the shape of the envelopes is provided by filling the inner volume with liquid under pressure, wave impedance of which is slightly different from the wave impedance of the working medium. The frame of the antenna used is a sound transparent envelope made of elastic composite material, the shape of which is provided by filling the inner volume of the envelope with working fluid. Water-impermeable envelopes for water-filled frames can be made based on modern materials. A water-filled antenna comprises receiving units in the form of extended sections which hold acoustic receivers with small wave dimensions, pre-amplifiers and electrical (optical) links. The receiving units are sealed with a polymer material and are mounted on the outer surface of the antenna by ropes. Uncased large-size antenna arrays form a rigid geometrical shape by filling the inner volume with working fluid under excess pressure. The excess pressure is generated by a hydraulic pump.

EFFECT: higher efficiency of hydroacoustic stations, high efficiency of the antenna, particularly a large aspect angle and concentration factor in a wide frequency band, low sonar visibility, material consumption, weight and cost.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in the proposed method there set are location coordinates and movement parameters of a carrier of a receiving-transmitting radio-technical system, considering an antenna directivity pattern (DP); boundaries of an area of radio emission interaction with a section of an underlying surface presented with a set of resolution elements are determined; an image of ground surface are pre-shaped in gradations of gray colour at intervals corresponding to image change frequency determined by a mapping mode, as well as signals determining navigation parameters and control signals shaped by the specified mapping mode, including antenna DP width as to azimuth and angle of a place, number of (strobes) of range channels, position of an antenna beam as to azimuth and angle of the place, duration of a sounding pulse, period of its repetition and type of modulation; depending on the obtained parameters, separation of the ground surface image is performed for each beam position into resolution elements as to range, which are characterised by a value of reflected signal amplitude determined based on averaged colour of the original image area corresponding to this resolution element; modulation of a pre-shaped harmonic signal is performed by amplitude of reflected signal from each resolution element; its phase modulation is performed with thirteen-digit Barker code, and based on the received signal, shaping of its in-phase and quadrature-phase components and its conversion to intermediate frequency and digital-to-analogue conversion is performed; then, sequence of actions is repeated for each beam position within a zone of vision.

EFFECT: improving accuracy and reducing time for simulation of a signal reflected from ground surface.

1 dwg

FIELD: physics, acoustics.

SUBSTANCE: invention relates to acoustic engineering and can be used in medical equipment for ultrasound scanning. The ultrasonic device comprises: a module having an input part and an output part; an ultrasonic transducer comprising a microbeam former configured for connection and disconnection from the input part of the module; and a display connected to the output part of the module. An ultrasonic system is also described.

EFFECT: widening the viewing angle of movements through ultrasonic images.

23 cl, 3 dwg

FIELD: measurement equipment.

SUBSTANCE: ultrasonic diagnostic system for generation of images creates an image with an extended field of vision (EFOV). A three-dimensional probe for generating an image moves along a patient's skin above anatomy that shall be introduced to an image with EFOV. As the probe moves, images are obtained from many differently oriented image planes, such as a sagittal plane and a transversal plane. As the probe moves, the image data of planes following one after another with one of orientations is compared to assess the probe movement. These assessments are used to arrange sequence of images generated in one of the orientations accurately relative to each other in the format of an image with EFOV. Movement assessments are also used to display graphics on the display screen, which shows to a user a scanning process as the probe moves.

EFFECT: progress can be indicated by probe speed measurement units, passed distance or the way passed by the moving probe.

15 cl, 12 dwg

FIELD: physics, acoustics.

SUBSTANCE: invention relates to hydroacoustics and can be used in seas, oceans and freshwater bodies as a geophysical rope engineering studies at the sea bottom. The hydroacoustic trailing antenna for geophysical work has an external elastic cable sheath inside of which there are receivers which consist of two identical sensitive piezoelectric elements made from an electrically polarised piezoelectric film with electrodes deposited on and strongly bound to its surface, sealed housings fitted with electronic boards with differential amplifiers and analogue-to-digital converters, a digital communication line and a power supply line. Inputs of the differential amplifiers are anti-phase connected to the sensitive piezoelectric elements and outputs are connected to analogue-to-digital converters, outputs of which are connected to the digital communication line. The sealed housings are in form of thin-walled cylinders made of hard plastic, the inner surface of which is respectively fitted with sensitive film-type piezoelectric elements by sides with opposite electric polarisation, wherein the film is stretched in a circular direction, and ends of the cylindrical housings are closed by covers, on the inner surfaces of which there are annular grooves in which seal rings are inserted. Rigid supporting members are placed between the covers inside the sealed housings. The film-type piezoelectric elements are in form of two semicylindrical casings mounted with spacing to the inner surface of the housings with opposite polarisation on their entire length, and the bearing member is in form of mesh braids which are mounted as a reinforcing element in the elastic outer cable sheath.

EFFECT: high sensitivity and reduced dependency on the immersion depth, as well as small diameter of the antenna.

2 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to ultrasound diagnostic systems of image formation. Device contains probe, made with possibility of transmitting ultrasound waves in heart and receiving response echo-signals, image processor, reacting on echo-signals, made with possibility of producing succession of myocardium images within, at least, part of cardiac cycle, analyser of myocardium movement, reacting on succession of images, which determines movement of multitude of myocardium segments, processor of engagement, reacting on movement of segments, produced by indicator of collective participation of multitude of segments as percentage of complete displacement of myocardium during cardiac cycle and relative intervals of time of participation of segments in myocardium movement relative to percentage of complete displacement during cardiac cycle, and display, connected with processor of engagement, which reflects indicator.

EFFECT: application of invention makes it possible to increase efficiency and accuracy of identification of loss of synchronicity in myocardium movement.

15 cl, 8 dwg

Active sonar // 2558017

FIELD: radio engineering, communication.

SUBSTANCE: according to the invention, the active sonar includes a processor unit, a receiving-transmitting unit, a connection cable from the processor unit to the receiving-transmitting unit, an antenna unit of the sonar with a built-in signal and control cable, wherein the receiving-transmitting unit is portable and includes two phased antenna arrays operating in a pair, one of which is a radiating array with a fan-shaped directional pattern, installed inside a housing and capable of rotating in the horizontal plane about an axis which passes through its geometric centre, and the other is a receiving antenna array which is immovably fixed in the housing and is made in the form of a ring which encircles the sealed housing, filled with a liquid for compensating for hydrostatic pressure of the ambient medium.

EFFECT: simple design of the sonar and operation thereof, low cost thereof owing to use of industrially manufactured components and existing data processing algorithms.

4 cl, 1 tbl, 4 dwg

FIELD: agriculture.

SUBSTANCE: invention relates to the field of fishing, and is intended for diagnostics of aquatic organisms (detection, location and movement, the species, age, sex and condition). Essence: using the measurements of the temperature field of the water area under study and echolocation based on the previously determined empirical relationships aquatic organisms behavior (preference for certain parameters of habitat, movement speed, characteristic movements depending on the species, age, sex and condition) on the temperature the presence and location of aquatic organisms is determined, and also their age, sex and condition.

EFFECT: determining not only the presence and location but also the type, age, sex and condition of aquatic organisms: fish and other aquaculture objects.

FIELD: physics, acoustics.

SUBSTANCE: invention relates to sonar, specifically to passive methods for acoustic detection and location of underwater divers, and can be used in underwater search and rescue operations, protecting coastal structures and beaches on the water side or protecting underwater structures, as well as protecting ships at the anchoring berth, offshore oil platforms, port entrances, bridge abutments, channels and water areas at hydroelectric power stations. The method is based on detecting and picking up from the detected noise of the water area under investigation quasi-periodic modulations of unremovable low-frequency respiratory noises of the underwater diver caused by the rhythm of respiratory manoeuvres, the frequency of which lies in the range of 0.1-1 Hz.

EFFECT: longer detection range.

3 cl, 3 dwg

FIELD: physics, navigation.

SUBSTANCE: invention relates to underwater navigation and can be used for determination of self-contained unmanned submarine proper coordinates in navigation under ice in high Arctic latitudes. This invention allows ruling out of limiting conditions of said submarine coordinates evaluation because of geometrical (spatial) position of gyro motor and submarine. Application of radio navigation receivers GPS/GLONASS, VHF navigation system at determination of gyro motor position with the help of TV-controlled unmanned submarine system as well as elimination of the use of self-contained unmanned submarine heading and OS direct measurement. Said use brings about incorrect data in high Arctic altitudes. Increase in gyro motor mobility allows decision of the problem of definition of proper coordinates of self-contained unmanned submarine in navigation of under ice.

EFFECT: higher accuracy of locating of self-contained unmanned submarine in high Arctic latitudes.

3 dwg

FIELD: physics.

SUBSTANCE: proposed method comprises reception of noise-emission signal, determination of noise signal and interference spectrum, accumulation of results and their comparison. Noise-radiation signal is received by signal antenna output to isolate the spectrum actual section. Then, performed are isolation of spectrum virtual section, reiteration of spectrum actual section isolation and reiteration of spectrum virtual section for N serial sets. Sid actual section and virtual sections are summed for N sets. Sum of actual section is squared as well as that of virtual sections. Energy spectrum of sum signal is defined. Simultaneously, the same initial data are used to define the energy spectrum of said difference as the sum of squares of N sets of the difference of actual sections and the sum of squares of N seta of the difference of virtual sections. Decision on the object noise-ration signal availability is make in case the sum energy spectrum exceeds that of the difference energy spectrum.

EFFECT: automatic detection of hydroacoustic signals.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a multielement hydroacoustic antenna, having a base on which sections are mounted, the sections having rod-shaped piezoceramic transducers, each section being enclosed in a sealed housing and having on the front side a plate in the openings of which front cover plates of the rod-shaped piezoceramic transducers are inserted, the cover plates being sealed with the walls of the openings by rubber decoupling seals, and each section having an electrical lead. In the antenna, each plate is a segment of a cylindrical surface with a height h with a centre angle β. The multielement hydroacoustic antenna is in the form of a segment of a thick-walled cylinder with thickness b, where b is the radial dimension of the section, height nh, where n is the number of sections on the height of the multielement hydroacoustic antenna, and a centre angle α=kβ, where k is the number of sections on the guide cylindrical surface. The base of the multielement hydroacoustic antenna is in the form of a circular metal flange which is provided with supports which are perpendicular to the flange and have the shape of a segment of a cylindrical surface which is congruent to the inner surface of the section; the supports are displaced from the edge of the base by a distance b. The housing of each section is attached by its back surface via detachable connections to two supports; the width of the support b1 is sufficient to accommodate a detachable connection, which may be threaded, and electrical leads from the sections are made at the back side thereof in spaces between supports and come out of the antenna through a centre hole in the flange.

EFFECT: easy transportation of the antenna to a facility and assembly thereof, which improves technological effectiveness thereof, reduces the cost and overall dimensions, and the possibility of replacing sections directly onboard prolongs service life without deterioration of tactical and technical characteristics.

2 cl, 2 dwg

Active hydrolocator // 2553730

FIELD: measurement equipment.

SUBSTANCE: invention relates to hydroacoustic equipment, namely to active hydrolocation, including to active hydrolocators intended for detection of objects, measurements of coordinates and parameters of movement of detected objects.

EFFECT: providing a possibility of detection with high probability of objects against reverberation interference, at unknown radial speed of a reflecting object, determination with increased accuracy of coordinates and parameters of movement of detected objects at radiation of only one sending.

1 dwg

FIELD: radio-engineering, communication.

SUBSTANCE: guarding system is intended for use at water areas, lakes, in river streams and channels. Use in the system of the direct information transmission via the border water-air ensures prompt deployment of the guarding system in the monitoring zone without cables routing on bed and without radio beacons use on the water surface thus excluding possibility of the unauthorized external effects on the system.

EFFECT: increased reliability and efficiency of the guarding system, simplification and cheapening of the transmission to the receiving point of the underwater situation information under complicated conditions of underwater monitoring and guarding measures at real water areas.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the development of underwater mineral deposits, mainly deposits of liquid and gaseous minerals, and namely to the construction of process facilities intended for the development of marine deep sea oil-and-gas deposits operated in extreme conditions. The method for the development of marine deep sea oil-and-gas deposits lies in the construction of a row of offshore fixed platforms, underwater bottom facilities, subsea intrafield and main pipelines, tanks for the well production storage and shipping facilities, at that at least one platform is made as a subsea version with a substructure fixed to the bottom and upper dimension placed below the water level per a value of the biggest size of an iceberg underwater part passing over it. Besides, all platforms in the subsea version should be interconnected structurally and technologically by electrical cables and pipelines for condensate and gas. Regular deep seismic sounding is performed in the area of terminals for the production of underwater hydrocarbon deposits by passive sensing of the sea bottom and further analysing of microseismic motions of the Erath crust; a block-module of a power supply platform is equipped with a gas turbine plant; sea conditions forecast is made close to the marine drilling rigs by the placement of pitch-roll buoys in the aquatic area and start-up of pilotless aircraft equipped with measuring instruments; a value of the biggest underwater part of an iceberg is defined by sounding of the underwater part of the iceberg by sonar signals from a movable submersible vehicle equipped with a parametric sonar and controlled through a hydroacoustic communications channel by an automated control and monitoring system; block-modules of the platform substructures in the subsea version used for the accommodation of personnel in underwater air chambers are made with docking units ensuring docking with a submarine escape vehicle placed in a special submarine hangar.

EFFECT: improved reliability of the construction and operation, reduced capital and operational costs for the development of marine deep sea oil-and-gas deposits.

2 dwg

FIELD: physics.

SUBSTANCE: method comprises image correction and unweighted full image segmentation (SEG) in snippets at the image preprocessing step (FPP), the use of a threshold value algorithm based on the detected local contrast changes at the detection step (DET), monitored learning with the aid of the support vector method (SVM) with a hyperplane (HE) for subdivision into two classes at the classification step (CLA), automatic calculation of the distance of the detected thermal signature of the marine mammal (TSMM) and its variation over time and space relative to the ship (RV) at the localisation step (LOC), the possibility of an instantaneous check of the decision by an operator at the verification step (VER), and automatic provision of user-specific image data (IRV) of the detected thermal signatures of marine mammals (TSMM) at the documentation step (DOC). An infrared camera system (IRC) with full or partial surround monitoring and an active gyroscopic stabilisation relative to the horizon (HZ) are used to generate data.

EFFECT: higher accuracy of real-time capture of marine mammals.

21 cl, 9 dwg

FIELD: medicine.

SUBSTANCE: invention relates to means for carrying out visualisation-guided medical procedures. Method of processing X-ray image contains stages, at which: 2D X-ray image of anatomical area, which includes ultrasound probe, is received, ultrasound probe s detected on it, ultrasound probe is superposed with reference coordinate system, with taking into account evaluation of position and orientation of ultrasound probe relative to reference coordinate system. Superposition stage additionally contains stage, at which presented in digital form projection of 3D model of ultrasound probe is correlated with ultrasound probe detected on X-ray image, with obtaining evaluation of ultrasound probe position and orientation from correlated 3D model. Computer-readable carrier contains stored in it sets of instructions for system-processing unit for combination of ultrasound and X-ray images, which contains X-ray system of 2D X-ray image, ultrasound system, including ultrasound probe, processing unit and monitor for combined image presentation.

EFFECT: application of invention makes it possible to increase accuracy of position determination.

9 cl, 4 dwg