Abstract: An adhesively coupled power-meter measures one or more of force, torque, power, and velocity of a mechanical arm. The power meter includes a plate with a first surface prepared for adhesively coupling to the mechanical arm. At least one strain gauge is physically coupled with a second surface, opposite the first, of the plate and with an orientation corresponding to an orientation of the adhesively coupled power meter such that mechanical forces are transferred from mechanical arm to the at least one strain gauge when the plate is adhesively coupled to the mechanical arm. The power meter also includes electronics for receiving a signal from the at least one strain gauge and for determining one or more of force, torque, power and velocity from the signal, and a wireless transmitter for transmitting one or more of force, torque, power and velocity to a receiving device.

Abstract: An embryo transfer catheter or other medical device has a shaft extruded with two layers. The outer layer is relatively thick and contains gas bubbles sufficient to increase the visibility of the catheter under ultrasound observation but with a density that allows material within the catheter to be viewed by the eye. The inner layer is relatively thin and is free of bubbles so that it provides a smooth bore to the catheter.

Abstract: A method for determining a pathology of a tissue sample. The method includes steps of coupling the tissue sample between two oppositely-facing ultrasonic transducers; acquiring a pulse-echo ultrasonic measurement and a through-transmission ultrasonic measurement of the tissue sample using the ultrasonic transducers; analyzing at least one of the pulse-echo ultrasonic measurement and the through-transmission ultrasonic measurement using time domain analysis; analyzing at least one of the through-transmission ultrasonic measurements and the pulse-echo ultrasonic measurements using frequency domain analysis; and determining the pathology of the tissue sample based on at least one of the time domain analysis and the frequency domain analysis.

Abstract: Ultrasound tomography imaging methods for imaging a tissue medium with one or more ultrasound transducer arrays comprising a plurality of transducers, wherein said transducers comprise source transducers, receiving transducers. The methods include assigning a phase value or time delay to source transducers, exciting the transducers and calculating a search direction based on data relating to the excited transducers.

Abstract: A device (1) and a method for therapeutic treatment comprising an acoustic treatment transducer (2) able to emit high intensity waves (HIFU) toward a target (3) in order to treat the target. The high intensity waves have a focal point. The device com-prises at least one detector (15) for detecting a change of tis-sue properties caused by the high intensity waves in the target (3). The device (1) further comprises at least one means for time measurement able to measure the time tmark from the beginning of the emission of a pulse of HIFU until a change of tissue properties is detected or means for detecting the frequency of appearance of changes of tissue properties.

Abstract: Non-invasive intracranial pressure detection and/or monitoring and use of data with respect thereto. Illustratively, with respect to a method, there can be a method to digitally produce and communicate intracranial pressure data from skull deformation electric signals, the method including: receiving, from at least one sensor, detected skull deformation electric signals at electrical equipment configured to transform and process the skull deformation signals that are received; transforming and processing, by the electrical equipment, the received skull deformation electric signals to produce digital intracranial pressure data; and outputting, by the electrical equipment, the digital intracranial pressure data via an output device operably associated with the electrical equipment to render the digital intracranial pressure data.

Abstract: The hand-held device detects the distance between a muscle and an outer skin layer in a body by impacting the outer surface of the skin and detecting the distance to the muscle from that point of engagement. The device includes a first end including a force sensor configured to detect the force of an impact of the first end to an associated body part. The device further includes a distance sensor provided at the first end configured to detect the distance between a skin outer layer and a muscle; and a main body configured to receive a hand. The detection device includes a controller and processor to detect the impact force and distance between the skin outer layer and muscle at engagement. The device may be used in a method of determining muscle depth and/or location in connection with the prescription and/or administration of anaphylaxis medications by auto injector.

Abstract: This invention relates to a device and a method for monitoring and optimizing photothermal therapy, using a high-power continuous-wave laser beam and a pulsed laser beam, both transmitted through a single soft, multi-mode optical fiber with a diffuse active tip, to interstitially irradiate the target tissue at the same time. The continuous-wave laser light induces photothermal effect and increases tissue temperature and the pulsed laser light produces a photoacoustic signal. The photoacoustic signal intensity is used to monitor the temperature changes in the target tissue and to guide the irradiation of the high-power laser to optimize the photothermal effect by adjusting the light intensity and irradiation time.

Abstract: A method, apparatus and computer program product for three-dimensional viewing of images is presented. Embodiments of the invention provide a process for combining slices generated by medical imaging devices to create a volume of interest and then present this volume in a three-dimensional representation to a head display unit so that the user can obtain a holistic view of the patient. Key image processing techniques are applied which enable the user to rotate and view the volume of interest from alternative viewpoints; to enable tissue subtraction to facilitate unobstructed viewing of a region of interest; to identify differing tissues with color schematics; to zoom in for optimal viewing; and to view a moving image of a volume of interest.

Abstract: An ultrasound diagnostic method and apparatus determines a transmission condition for generating shear waves at two or more positions of an object, for each of a plurality of elements of a transducer, and generates an ultrasound signal transmitted to the object through a full aperture of the transducer, according to the transmission condition.

Abstract: The present embodiments relate to a device and a method for determining at least one concentration of coal particles in a gas flow flowing through a channel, wherein at least part of the gas flow having coal particles contained therein is measured by at least one microwave sensor and at least one measurement signal characterizing the concentration of the coal particles is provided, wherein an autocorrelation function of the measurement signal is determined and at least one distance value characterizing a distance of a point of the gas flow belonging to the concentration from the microwave sensor is determined in dependence on the autocorrelation function.

Abstract: An object information acquiring apparatus is used, including: an optical transmission system for transmitting light from a light source; a photoacoustic probe including an irradiating end for irradiating an object with light and a receiver for receiving acoustic waves generated from the object that has been irradiated with light; a processor for acquiring information on the object based on the acoustic waves; a light quantity meter for measuring the quantity of light emitted from the irradiating end; a memory for storing a measurement value; and a presentation unit. The processor compares the measurement value with a reference value of light quantity or a history of measurement value stored in the memory, and provides a result regarding whether or not the measurement value is within a reference range to the presentation unit.

Abstract: Non-invasive intracranial pressure detection and/or monitoring and use of data with respect thereto. Illustratively, with respect to a method, there can be a method to digitally produce and communicate intracranial pressure data from skull deformation electric signals, the method including: receiving, from at least one sensor, detected skull deformation electric signals at electrical equipment configured to transform and process the skull deformation signals that are received; transforming and processing, by the electrical equipment, the received skull deformation electric signals to produce digital intracranial pressure data; and outputting, by the electrical equipment, the digital intracranial pressure data via an output device operably associated with the electrical equipment to render the digital intracranial pressure data.

Abstract: A method and system for automatic non-invasive estimation of shear modulus and viscosity of biological tissue from shear-wave imaging is disclosed. Shear-wave images are acquired to evaluate the mechanical properties of an organ of a patient. Shear-wave propagation in the tissue in the shear-wave images is simulated based on shear modulus and viscosity values for the tissue using a computational model of shear-wave propagation. The simulated shear-wave propagation is compared to observed shear-wave propagation in the shear-wave images of the tissue using a cost function. Patient-specific shear modulus and viscosity values for the tissue are estimated to optimize the cost function comparing the simulated shear-wave propagation to the observed shear-wave propagation.

Abstract: A device and method for the non-invasive measurement of state of tension, biomechanical and viscoelastic properties of surfaces of soft biological tissues includes electronic, digital and mechanical elements and sensors, and a testing end. The elements within the housing can subject the testing end to a mechanical impulse force, and can sense the movement of the testing end. The testing end has a contact surface which can be adhered to the surface of the soft biological tissue, and subjected to a mechanical force in a direction parallel to the surface.

Abstract: There is provided a system of transmitting partograph information and analyzing the same comprising a client device adapted to receive partograph information as inputs; the inputs transmittable to a partograph processing server via a wireless communication network; wherein the partograph processing server is configured to receive the partograph information; conform the partograph information to a standardized format and disseminate the partograph information to at least one computer device. Preferably, the partograph processing server further comprises an analyzer to analyze the partograph information for one or more abnormality condition and provides an alert to the at least one computer device and the client device. Alternatively, the analyzer is installed in the client device in the form of a software application.

Abstract: A medical device and a system for medical treatment comprising the medical device are disclosed. The medical device comprises a fluidic conduit and/or is configured to be operatively coupled to a fluidic conduit. The medical device comprises a flow regulator for regulating the flow of a fluid in the fluidic conduit and at least two movable elements, which are passively displaceable as a function of a fluidic pressure change in the fluidic conduit or actively displaceable for regulating the flow of fluid in the fluidic conduit. The medical device further comprises at least one transponder circuit comprising at least one transponder element chosen from a capacitor, an inductor, a resistor, or combinations thereof, being arranged with respect to the movable elements such that the transponder circuit has a capacitance or inductance or resistance or resonant frequency or Q factor, which changes as a function of the displacement of the movable elements.

Abstract: One aspect of the present disclosure relates to a system that can measure profusion through a volume of tissue. The system can include a non-transitory memory that stores instructions and a processor that can be configured to execute the instructions to at least: receive an ultrasound signal response of a contrast agent within a volume of interest and determine the perfusion through the volume of tissue based on a probabilistic constant related to the geometry, the tissue density, the ultrasound signal response, and a feature of the geometry. The ultrasound signal response can include a time dimension and three position dimensions. The volume of interest can include a tissue density and a geometry.

Abstract: A thickness measuring device using ultrasonic waves is provided. A cortical bone thickness measuring device includes a plurality of oscillators, a reception waveform storage, an echo waveform synthesizing module, an inner-surface focusing waveform acquiring module, and a thickness calculating module. The plurality of oscillators are arrayed and each of the oscillators is transmittable and receivable of an ultrasonic wave. The echo waveform synthesizing module obtains an echo waveform corresponding to the ultrasonic beams by synthesizing reception waveforms of the respective oscillators stored in the reception waveform storage in advance, while scanning a focusing position of the ultrasonic beams.

Abstract: Methods, apparatus and systems for characterizing changes in at least one physical property of soft tissue. A series of acoustic pulses is generated and directed into the soft tissue such that at least one of the pulses is of sufficiently high intensity to induce physical displacement of the tissue. Waves reflected off the tissue, or a flexible member that moves with the tissue, are received and measured to estimate at least one characteristic of the physical displacement induced thereby. Repetition of the generating, receiving and estimating steps provides characterization of the at least one physical property over time. Methods, apparatus and systems for characterizing at least one physical property of blood, by generating a series of acoustic pulses and directing the series of pulses into the blood such that at least one of the pulses is of sufficiently high intensity to induce physical displacement of the blood.

Abstract: An improved method and device for accurate, efficient surgical procedures are disclosed. The disclosed system consists in simultaneously using an elongated member that conveys energy to a treatment site and imaging means to control position of the elongated member and monitor treatment progress in real-time. In a preferred embodiment, for BPH, a twister fiber with a fused cap is used and ultrasound image guidance is obtained using a rectal probe. The method consists in placing an ultrasound rectal probe, fixed by mechanical means, and an optical fiber inserted into urethra. Initial positioning of probe is done under endoscopic/ultrasound control. The twister fiber probe operates in contact-mode. Treatment is monitored, real-time, by the ultrasound device. Additional imaging technologies include Positron Emission Tomography (PET), Computed Tomography (CT) or Optical Coherence Tomography. Other applications include the removal of tumorous (hyperplasic) tissue.

Abstract: Provided are an ultrasound system and a method of detecting a pressure applied to an object through an ultrasound probe. The ultrasound system includes: an ultrasound data acquiring unit configured to acquire, by using an ultrasound probe including a strain gauge that is strained by a pressure applied thereto and has a damping factor and an elasticity factor, ultrasound data corresponding to an object; and a processor configured to generate an ultrasound image by using the ultrasound data, calculate a strain rate of the strain gauge caused by the pressure by using the ultrasound image, and detect the pressure by using the strain rate calculated.

Abstract: The present disclosure provides, in certain embodiments, a system and method for generating a 3D model of a biopsy specimen. The 3D model may greatly enhance the capability to identify insufficient margins surrounding neoplastic tissue obtained through an excisional biopsy, and improve communication from a pathologist back to a surgeon and/or patient. The model provides a 3D representation of the neoplastic tissue within the specimen, thereby allowing the surgeon (or other medical personnel) to rotate and orient the model at any desired angle to identify insufficient margins and relate the location of the insufficient margins to the removal site to more accurately identify the location at which additional tissue needs to be excised. By identifying the exact location at which additional tissue needs to be excised, the surgeon is able to minimize the amount of additional tissue removed from the patient in order to achieve sufficient margins.

Abstract: A method and system for detecting insulin resistance, diabetes, cardiovascular disease and/or autonomic neuropathy in a patient is provided. The method includes measuring a photoplethysmogram (PTG) and galvanic skin response from the patient, executing a spectral analysis on the PTG, comparing values derived from the PTG and the galvanic skin response of the patient to stored clinical data, calculating a PTG cardiovascular risk score based on the comparison, comparing further derived values to predefined values that correspond to certain diseases, including insulin resistance, diabetes, cardiovascular disease and autonomic neuropathy, and displaying the PTG cardiovascular risk score and said certain diseases that correspond to said predefined values.

Abstract: The present invention provides a system and method for ultrasound processes using wave attenuation derived from k-space analysis by analyzing spatial frequency domain data.

Abstract: An intraocular pressure sensor system has a first pressure sensor located in an anterior chamber of an eye and a remote pressure sensor located remotely from the first pressure sensor. The remote pressure sensor measures or approximates atmospheric pressure. A difference between readings from the first pressure sensor and the remote pressure sensor approximates intraocular pressure.

Abstract: An ultrasound diagnosis apparatus includes a transmitter, a generator, and an output controller. The transmitter transmits, from an ultrasound probe, push pulses that cause displacement of body tissue according to an acoustic radiation force and transmits, from the ultrasound probe, tracking pulses for observing the displacement of body tissue, which is caused according to the push pulses, in a given scanning area. The generator generates transmission area image data displaying a position to which the push pulses are transmitted. The output controller outputs the generated transmission area image data such that the transmission area image data is superimposed onto medical image data that contains the transmission area.

Abstract: Detection of tissue response is provided with a high pulse repetition frequency. A sequence of separable signals is transmitted in one event. For example, pulses at different frequencies are transmitted as separate waveforms, but in rapid succession. As another example, coded transmit pulses are used. After transmission of the pulses, signals are received. Based on the different frequencies or coding, tissue response is measured at different times based on the receive event. Instead of one measure, a plurality of measures are provided for a given transmit and receive event pair, increasing the effective pulse repetition frequency for shear or elasticity imaging.

Abstract: A catheter (4) based medical system (1) and medical procedure for reducing cardiac valve regurgitation are disclosed. The system comprises a resilient curvilinear shaped annuloplasty implant (3) for reducing the size of a dilated annulus (18) of said valve for reducing said regurgitation having resilient anchoring elements (300), and a delivery device (2) for said annuloplasty implant (3) having a distal curvilinear shaped portion (200) that is hollow to mount said annuloplasty implant (3) and has an annular opening (201) arranged to be in apposition against an annulus (18) of said cardiac valve. The annuloplasty implant (3) is arranged to be releasable in said hollow and has said resilient anchoring elements (300) arranged in a restrained spring loaded delivery conformation in said hollow, and wherein said resilient anchoring elements (300) when released are arranged in a tissue engaging conformation protruding out of said opening.

Abstract: A method for determining biological indicators, the method including, in a processing system causing at least one radiation attenuation measurement to be performed and determining at least one first biological indicator using determined radiation attenuation. In addition to this, method includes causing at least one impedance measurement to be performed and determining at least one second biological indicator using a determined impedance measurement.

Abstract: Aspects of the present disclosure are directed to processing ECG signals from a subject. As may be implemented in accordance with one or more embodiments, respective electrodes sense ECG signals from a subject, and the ECG signals are digitized and processed, such as to remove noise, detect a QRS complex, evaluate quality, detect arrhythmia and/or to store the signals. In response to an input from the subject, one or more of the ECG signals is recorded along with sound from the user, such as to concurrently record the user's voice for describing conditions in connection with the recording of the ECG signals. This approach can be carried out in an enclosed housing, operated adjacent the subject's thorax. The processed digitized ECG signals and the audio signals are then communicated for receipt by an external device.

Abstract: Information associated with shear calculation is also displayed in ultrasound shear wave imaging. More information than just a shear wave image is provided for diagnosis. Information about the quality or variables used to determine shear is also displayed. This additional information may assist the user in determining whether the shear information indicates tissue characteristics or unreliable shear calculation.

Abstract: An ultrasound device can be calibrated for forming skeleton density information. This ultrasound device includes a calibration program integrated programmatically to the ultrasound device and a calibration part for calibrating a known distance L. The velocity of ultrasound is known for different temperatures in the calibration part. The ultrasound device includes at least two transmitters having a distance of L1 between them for transmitting ultrasound signals into the skeleton, and at least two receivers having a distance of L2 between them for receiving ultrasound signals from the skeleton. At least one of distances L1 and L2 is equal to the calibrated known distance L. The ultrasound device also includes a processing unit for calculating an ultrasound velocity in the skeleton.

Abstract: An image processing apparatus includes: when a probe is moved, a shift amount correction section configured to correct an amount of shift from a first frame to a second frame being a frame at different time from the first frame; and a distortion amount calculation section configured to calculate an amount of distortion on the basis of a phase difference detected from the first frame and the second frame having been subjected to shift amount correction by the shift amount correction section.

Abstract: Disclosed is a method and apparatus of generating a temperature image during ultrasonic treatment, the method including setting a first plane indicating a heating region where ultrasonic waves for treatment are irradiated and setting a second plane indicating a protective region around the heating region; irradiating the first plane with ultrasonic waves for diagnosis at a first frame rate, and irradiating the second plane with the ultrasonic waves for diagnosis at a second frame rate, the second frame rate being lower than the first frame rate; and generating the temperature image using frame images acquired from irradiating the ultrasonic waves for diagnosis.

Abstract: In accordance with embodiments disclosed herein, systems, methods, and computer programs are provided that determine a mechanical property of a subject. An excitation force is applied to a displacement origin within a subject, and a shear wave is generated in response to application of the excitation force. The displacement data indicative of displacement motion at the sample position is sampled by tracking pulses, and the timing of at least one of the tracking pulses is adjusted relative to application of the excitation force. The process continues until a peak displacement of the shear wave for the sample position is determined based upon the displacement data.

Abstract: During an analysis technique, the locations of a polyp candidate (and, more generally, a feature) in images of the colon acquired with different orientations of an individual are compared to determine if the polyp candidate is a true positive (an actual polyp) or a false positive (an artifact). In particular, the locations are compared for images when the individual is supine and prone. During this rotation by approximately 180° (and, more generally, a symmetry operation), an actual polyp is expected to also be rotated by approximately 180°. Consequently, the location change during the symmetry operation can be used to validate whether the polyp candidate is an actual polyp. Because the colon is a non-rigid object (with degrees of freedom including rotation, compression and expansion), reference markers (such as haustral folds) are used to assist in determining the location of the polyp candidate in the images acquired in the different orientations.

Abstract: A directional-position sensing fast neutron sensor system is disclosed. The system includes one or more acoustically tensioned metastable fluid detector (ATMFD) for determining the direction of the source of incident neutron radiation. The system has been used to detect the position of a 1 Ci Pu—Be neutron radiation source. The ATMFD detector is comparable in technical performance with directional fast neutron detector-bank technologies but is significantly more economical, smaller, and has little to no interference from nonneutron background radiation. The ATMFD detector can be used to locate hidden neutron sources and has been used in blind tests to do so. Specifically an ATMFD system (with a 6×10 cm cross-sectional area) provides directional information for incoming neutron radiation from an 8 kg Pu source from a distance of 25 m with a resolution of 11.2° at a 68% confidence within 60 seconds. Position and neutron source image sensing were also demonstrated using two ATMFDs.

Abstract: A blood pressure measurement apparatus includes a sensor, an input section, and a circuit. The sensor is configured to measure blood flow speed in a target blood vessel. The input section is configured to input blood pressure from a measurement apparatus continuously measuring the blood pressure. The circuit is configured to estimate the blood pressure on the basis of the blood flow speed by referencing a correlation formula that indicates correlation characteristics of the blood pressure from the measurement apparatus and the blood flow speed from the sensor.

Abstract: A method of measuring propagation of a shear wave by using an ultrasound transducer includes generating a shear wave inside the object, setting a region of interest (ROI) on which propagation of the shear wave is to be observed, and determining a position of a second focus on which ultrasound signals are to be directed to obtain information about the ROI, irradiating the ultrasound signals toward the second focus, and receiving echo signals reflected from the ROI.

Abstract: Acoustic radiation force impulse (ARFI) scanning uses a swept focus in transmit. Using a changing delay or phase profile across the array during the generation of the ARFI pulse, a time varying focus is provided for the ARFI beam. This time varying focus may be used to extend the focus in depth, azimuth, and/or elevation. Less repetition may be needed to measure tissue characteristics from displacements due to the multi or continuous change in foci within a given ARFI transmit beam.

Abstract: Motion tracking is performed with a thermal pattern within a patient. A pattern of different temperature is created in tissue, such as warming up tissue in a checkerboard pattern. The temperature pattern is used over time to track motion of the tissue. The tracked motion may be used to treat the tissue throughout at least part of a periodic cycle.

Abstract: The ultrasonic diagnosis apparatus including a cross-section region image constituting unit configured to constitute a cross-section region image at a diagnosis portion of a diagnosing object through an ultrasound probe, an elasticity information calculating unit configured to calculate elasticity information indicating hardness, an elasticity image constituting unit configured to constitute an elasticity image based on the elasticity information calculated at the elasticity information calculating unit, and an image display unit configured to display the cross-section region image and the elasticity image, includes a temporal variation analyzing unit configured to analyze temporal variation at respective measurement points from the elasticity information calculated at the elasticity information calculating unit and a temporal variation image constituting unit configured to constitute a temporal variation image based on the temporal variation analyzed at the temporal variation analyzing unit, and the image di

Abstract: A determination assist system including a first image generating section for generating a first planar image based on data of a first test index; a second image generating section for generating a second planar image based on data of a second test index; a differentiation section which differentiates the first planar image and the second planar image to generate a first differential image and a second differential image, respectively; a binarization section which binarizes the first differential image to generate a first binary image including a first region which is not less than a first threshold and a second region which is less than the first threshold, and binarizes the second differential image to generate a second binary image including a third region which is not less than a second threshold and a fourth region which is less than the second threshold; and a determination image generating section.

Abstract: Apparatuses and methods for corrective guidance of eating behavior of a patient equipped with a gastric restriction device. The apparatus provides continuous monitoring or one or more parameters related to food passing through the gastric restriction device. Each monitored parameter is processed to provide a visual indication of the current eating behavior. The visual indication is used as input to the patient or a caregiver to modify the eating behavior. In some embodiments, the apparatus includes an emergency relief mechanism that automatically relieves excess pressure developing in the gastric restriction device. In some embodiments, the apparatus is enabled to deliver an appetite suppressant to modify the eating behavior.

Abstract: A non-contact measuring method in pediatrics is disclosed. An infant model is established by acquiring a human image and a depth image of a subject infant; updating the infant model by acquiring a plurality of anthropometric characteristic points and finally obtaining an anthropometric data of the subject infant from the updated infant model. This invention also provides an apparatus to achieve the above mentioned measuring method. An infant model which includes anthropometric characteristic points and 3D surface models is established based on a human image acquired by an image acquisition module and a depth image acquired by a depth information acquisition module in conjunction with an algorithm program built in a data acquisition and processing module. Human anthropometric data is obtained by analyzing the infant model. The non-contact measuring method and measuring apparatus in pediatrics make the measuring process more humane without contacting a subject body.

Abstract: A method for evaluating mechanical properties of a sample includes applying a plurality of pulses of acoustic energy to a sample to apply a mechanical force to the sample and induce a non-steady-state displacement in the sample. The method further includes monitoring a response of the sample caused by the application of the mechanical force. The method further includes determining a quantitative value for a mechanical property of the sample based on the response.

Abstract: Adaptive image optimization is provided in induced wave ultrasound imaging. The values for various transmit and receive parameters may be set adaptively. Based on feedback from use with a given patient, the values are set to better optimize signal-to-noise ratio, off-time, tracking accuracy or other consideration. Transmit frequency, F-number, line spacing, tracking pulse repetition frequency, line sampling count, and/or push pulse amplitude values may adapt.

Abstract: A method for generation and analysis of shear waves in a subject with an ultrasound system. Multiple short ultrasound push pulses are applied, as a set and optionally more than once, to one or more push origins at the subject to produce first and second shear waves of large amplitudes and desired spatial distributions, which are separated in space and time and which have opposite polarity such that initial movements of the subject tissue, respectively caused by the first and second shear waves, occur in opposite directions. At least one mechanical property of the subject (including that represented by shear wave group velocity, phase velocity, and attenuation of a shear wave) is determined based at least in part on a distance between wavefronts of the first and second shear waves.

Abstract: A first ultrasound pulse is applied to biological tissue to create shear waves in the biological tissue, an ultrasound pulse is transmitted into the biological tissue, one or more ultrasound signals is received from the biological tissue, and shear waves are detected in the biological tissue based on the received one or more ultrasound signals. At least one propagation property associated with the detected shear waves is determined, and the determined at least one propagation property is displayed.