A method of full-field or “ping-based” Doppler ultrasound imaging allows for detection of Doppler signals indicating moving reflectors at any point in an imaging field without the need to predefine range gates. In various embodiments, such whole-field Doppler imaging methods may include transmitting a Doppler ping from a transmit aperture, receiving echoes of the Doppler ping with one or more separate receive apertures, detecting Doppler signals and determining the speed of moving reflectors. In some embodiments, the system also provides the ability to determine the direction of motion by solving a set of simultaneous equations based on echo data received by multiple receive apertures.

A transducer array (802) includes at least one 1D array of transducing elements (804). The at least one 1D array of transducing elements includes a plurality of transducing elements (904). A first of the plurality of transducing elements has a first apodization and a second of the plurality of transducing elements has a second apodization. The first apodization and the second apodization are different. The transducer array further includes at least one electrically conductive element (910) in electrical communication with each of the plurality of transducing elements. The transducer array further includes at least one electrical contact (906) in electrical communication with the at least one electrically conductive element. The at least one electrical contact concurrently addresses the plurality of transducing elements through the at least one electrically conductive element.

Provided is a photoacoustic measurement device including: an ultrasound image generation unit that generates an ultrasound image on the basis of a detection signal of reflected ultrasonic waves generated by the transmission of ultrasonic waves; a puncture needle detection unit that detects a length direction of a puncture needle on the basis of the ultrasound image; and a controller that controls a steering direction of a sample gate which is a Doppler measurement target on the basis of the length direction of the puncture needle such that an angle θ formed between a straight line extending in the length direction of the puncture needle and a straight line extending in the steering direction of the sample gate satisfies 0°≤θ<90°.

An electronic device includes: a cover glass, including a first side and a second side; an ultrasonic wave transmitter and an ultrasonic wave receiver, arranged on the second side of the cover glass. Orthographic projections of the ultrasonic wave transmitter and the ultrasonic wave receiver onto the cover glass may be at two opposing ends of the cover glass. The ultrasonic wave transmitter is configured to emit an ultrasonic wave, the ultrasonic wave is able to enter the cover glass from an end, reflected between the first side and the second side for a plurality of times, emitted out of the cover glass from another end, and received by the ultrasonic wave receiver.

A method for producing an image of at least one vessel with ultrasound includes administering a contrast agent particle into the at least one vessel, and delivering an ultrasound pulse having a first frequency range to the at least one vessel. The method further includes detecting ultrasound energy scattered from the contrast agent particle at a second frequency range that is different from the first frequency range, converting the scattered ultrasound energy into an electronic radio frequency signal, and using an algorithm to determine a spatial location of the contrast agent particle based on extraction of a specific feature of the radio frequency signal. The method further includes generating an image by displaying a marker of the spatial location of the contrast agent particle with a resolution that is finer than a pulse length of the ultrasound pulse and repeating the detecting, converting, using, and generating for a plurality of contrast agent particles until sufficient markers have been accumulated to reconstruct a pattern of the at least one vessel; wherein the pattern is an image of the at least one vessel.

An ultrasonic sensor includes a substrate, a platen and an acoustic stack disposed between the substrate and the platen, including at least one piezoelectric layer. The ultrasonic transducer exhibits a signal-to-noise ratio of at least 4 over a frequency range of at least 9 to 16 MHz.

Transmit-Receive Longitudinal (TRL) probes can be used for the inspection of noisy material, such as austenitic materials. By using various techniques, an inspection area is not constrained by a wedge design of an ultrasonic probe and the benefits of using a linear probe array (rather than a matrix) are maintained. Volumetric or TFM-like imaging on austenitic materials using a linear transmit array and a linear receive array that are out of plane with one another (a TRL configuration) and not in the main imaging place can simplify the inspection and analysis of such materials. For each scan position, an ultrasound probe can acquire acoustic imaging data. Then, a processor can then combine acquisitions from adjacent scan positions to create an imaging result using synthetic aperture focusing technique (SAFT) principles to recreate a focalization in a passive axis of the probe.

A system for measuring a number of layers in a layered environment includes an ultrasound transducer positioned at an exterior surface of a first layer at a first location. At least one receiving sensor is positioned perpendicular to the exterior surface of the first layer at a second location. The ultrasound transducer and the at least one receiving sensor are in communication with a computer processor, power source, and computer-readable memory. The ultrasound transducer is configured to emit a first ultrasound signal into the first layer at the first location. The at least one receiving sensor is configured to receive a plurality of propagated ultrasound signals. The processor is configured to determine a total number of layers in the layered environment based on at least one from the set of: a number of signals received and a number of propagation direction changes only of the first ultrasound signal.

Provided is an ultrasonic CT device capable of shortening a transmission interval of ultrasonic waves while suppressing influence of a reception signal of reverberation waves of the ultrasonic waves on an original reception signal. when transmission and reception are repeated, a timing of current transmission is controlled such that a timing at which reverberation waves, which are ultrasonic waves transmitted in previous transmission and are reflected by a transducer array at least once, reach transducers used for current reception deviates from a timing at which ultrasonic waves transmitted in current transmission reach the transducers used for the current reception.

Techniques, systems, and devices are disclosed for synthetic aperture ultrasound imaging using spread-spectrum, wide instantaneous band, coherent, coded waveforms. In one aspect, a method includes synthesizing a composite waveform formed of a plurality of individual orthogonal coded waveforms that are mutually orthogonal to each other, correspond to different frequency bands and including a unique frequency with a corresponding phase; transmitting an acoustic wave based on the composite waveform toward a target from one or more transmitting positions; and receiving at one or more receiving positions acoustic energy returned from at least part of the target corresponding to the transmitted acoustic waveforms, in which the transmitting and receiving positions each include one or both of spatial positions of an array of transducer elements relative to the target and beam phase center positions of the array, and the transmitted acoustic waveforms and the returned acoustic waveforms produce an enlarged effective aperture.