The invention relates to methods, systems, and devices providing an imaging array having a row-column addressed configuration and capable of being controlled via bias activation, thereby allowing the selection and optimization of an imaging aperture for ultrafast imaging.

Disclosed is a broadband underwater acoustic transceiver device. The device can be used in particular for positioning, detection, range finding or underwater acoustic communication. The device coaxially combines, within a transceiver device, a Tonpilz transducer and a FFR transducer, the FFR being arranged in front of the transmission face/horn of the Tonpilz transducer. In such a configuration, the Tonpilz horn also acts as reflective tape for the FFR transducer, forming a common tape-horn element. Furthermore, an annular baffle surrounding the Tonpilz pillar creates a Helmholtz cavity for broadening the emission band towards the low frequencies.

A ultrasonic-oscillator unit including an ultrasonic-oscillator array in which a plurality of ultrasonic-oscillators are arranged in a semicylindrical shape; an electrode part of the ultrasonic-oscillator array provided on an end surface of the ultrasonic-oscillator array perpendicular to an arrangement surface of the plurality of ultrasonic-oscillators; and a backing material layer that is disposed on an inner back surface of the ultrasonic-oscillator array; and a cable wiring part in which a plurality of cables are respectively disposed on a plurality of wiring lines electrically connected to the plurality of electrodes of the electrode part. The width of the backing material layer perpendicular to the arrangement surface of the plurality of ultrasonic-oscillators becomes smaller toward a side opposite to the arrangement surface of the plurality of ultrasonic-oscillators. A cable wiring part electrically connected to the electrode part is provided along the width of the backing material layer.

A system for producing sound waves in a medium, the system comprising: at least two first free-flooded ring transducers centered about a first axis, the first free-flooded ring transducers being substantially cylindrical and having an axial gap of height g therebetween such that they form a first column; and at least one cylindrical body centered about the first axis nested in the first column, such that the cylindrical body is aligned with the axial gap. The cylindrical body may be a tweeter free-flooded ring transducer. This provides for improved wideband performance in a free flooded ring array.

The present disclosure related generally to ultrasound imaging, such as intravascular ultrasound imaging. For example, some embodiments of the present disclosure provide an ultrasound imaging system with improved acoustic impedance matching between an ultrasonic transducer and a vessel of interest. For example, in some implementations, an ultrasound imaging device includes a flexible elongate member and an ultrasound scanner assembly disposed at a distal portion of the flexible elongate member. The ultrasound scanner assembly includes a plurality of ultrasound transducers arranged circumferentially, and an impedance matching structure is coupled to the plurality of ultrasound transducers. In some such embodiments, the impedance matching structure is disposed radially outward from the plurality of ultrasound transducers, and in some embodiments, the impedance matching structure is disposed radially inward from the plurality of ultrasound transducers.

Ultrasound transducers optimized to detect blood flow are described. An example transducer includes a non-cubic piezoelectric crystal. An emitting side of the crystal is configured to emit ultrasound toward a blood vessel. A receiver is configured to detect a reflection of the ultrasound from blood in a blood vessel.

Ultrasound transducer element arrays using acoustic ensonification drive patterns via a patient interface for sonosensitizer activation in sonodynamic therapy. Incoherent acoustic field generation varying phase, frequencies, and/or amplitude via controlled delivery of low intensity planar acoustic waves. Method includes generating a first and a second signal to generate respective acoustic ensonification drive patterns with phase, frequency, and amplitude and generating at least one relative phase, frequency or amplitude difference to generate a third incoherent acoustic ensonification pattern to activate a sonosensitizer. Calibration and complementary therapy procedures to improve cell susceptibility of cells to sonodynamic therapy are disclosed.

Methods and devices for imaging wells using phased array ultrasound imaging devices is described. The devices enable high resolution real-time imaging of a well during various operations in the well, including during completions, fracturing, milling, fishing and drilling operations. The phased array ultrasound imaging devices may be integrated with other well tools, such as a bottom hole assembly (BHA), fishing tools, milling tools, fracturing tools, and drilling tools, in order to integrate imaging capabilities into such tools.

In a body cavity insertion-type ultrasound probe, acoustic matching between each transducer and a living body is improved. A film member (FPC substrate) is configured with a base film and a conductor layer. The conductor layer includes a signal pattern, a ground pattern, and a plurality of acoustic element arrays. An acoustic matching layer is provided between each transducer and the base film. The acoustic matching layer consists of an acoustic element array and a filling material. A ratio of a conductor material in the acoustic matching layer determines an acoustic impedance of the acoustic matching layer.

In an embodiment, a tile device includes a plurality of piezoelectric transducers elements and a base adjoining and supporting the plurality of piezoelectric transducers elements. The base includes integrated circuitry programmed to successively configure operational modes of the tile, according to a pre-programmed sequence, to successively select respective subsets of the piezoelectric transducers elements for activation. The integrated circuitry includes pulser logic to selectively activate such subsets, and demultiplexer logic to communicate from the tile sense signals resulting from such activation. In another embodiment, the demultiplexer logic is part of a first voltage domain of the tile, and the pulser logic is part of a second voltage domain of the tile. The base may include circuitry to protect the demultiplexer logic from a relatively high voltage level of the second voltage domain.