An intraluminal ultrasound imaging device includes a flexible elongate member configured to be positioned within a body lumen of a patient. The flexible elongate member includes a proximal portion and a distal portion. The device also includes an ultrasound imaging assembly disposed at the distal portion of the flexible elongate member. The ultrasound imaging assembly is configured to obtain imaging data of the body lumen. The ultrasound imaging assembly includes a transducer array including a substrate, a silicon oxide layer disposed over the substrate, and a plurality of rows of micromachined ultrasound transducer elements disposed on the silicon oxide layer. Two of the plurality of rows of micromachined ultrasound transducer elements are spaced apart by a trench formed by etching through a screen formed in the silicon oxide layer. Associated devices, systems, and methods are also provided.

This invention is the improved methods and ultrasound apparatus with the wirelessly chargeable battery of the ultrasound probe and with the record of the ultrasound data and ultrasound images on the removable memory card. The improved methods provide the steps of the operation of the improved ultrasound apparatus, and the improved ultrasound apparatus includes the microprocessor unit and control organs unit, which provide control of an ultrasound unit, comprising piezoelectric devices, a transmission unit, a battery unit, including battery and battery wireless charging control circuitry, indication unit, and includes a card insertion registration device recognizing the presence of a removable memory card in the ultrasound probe.

An assembly for use in a TTField-generating system is disclosed that includes at least one electrode in combination with a polymerized conductive hydrogel and a liquid conductive hydrogel disposed on at least a portion of the polymerized hydrogel. Also disclosed are transducer arrays including the assemblies, as well as kits and methods of producing and using the assemblies, arrays, and systems.

A backing includes a heat-conductive particle assemblage with irregular voids and a filler which fills the voids. A portion of ultrasound that propagates backward from a piezoelectric layer scatters and attenuates in the backing. Heat generated at the piezoelectric layer is conducted to a heat exhaust block via the particle assemblage.

A display apparatus including a flexible vibration module and a method of manufacturing the flexible vibration module are provided. A display apparatus includes: a display panel configured to display an image, and a flexible vibration module on a rear surface of the display panel, the flexible vibration module configured to vibrate the display panel, the flexible vibration module including: a plurality of first portions having a piezoelectric characteristic, and a plurality of second portions respectively between pairs of the plurality of first portions, the plurality of second portions having flexibility.

A system for maintaining coherence of ultrasound waves emitted by multiple transducer arrays includes multiple retention arms, each for receiving one of the transducer arrays; a connecting frame for receiving and mechanically retaining the arms in fixed angular relation to each other; and a processor configured to determine relative locations of the transducer arrays with respect to one another and the connecting frame; determine a location of the connecting frame relative to an anatomic region of interest; determine a spatial arrangement of the transducer elements in each transducer array with respect to the anatomic region of interest; and adjust a transmission configuration of the transducer elements in the transducer arrays to achieve a desired focusing property with respect to the anatomic region of interest while maintaining coherence therebetween.

Provided is a piezoelectric film capable of realizing an electroacoustic conversion film with an excellent heat dissipation property, in which a sufficient sound pressure with respect to an input operating voltage is obtained. The piezoelectric film is a piezoelectric film including a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material, electrode layers which are laminated on both surfaces of the polymer-based piezoelectric composite material, and a protective layer laminated on a surface of at least one electrode layer, in which in a case where a cross section of the piezoelectric film is observed with a scanning electron microscope, at least one electrode layer has a plurality of projections directed toward the protective layer, and the number of projections is in a range of 2 to 40 per visual field of 85 μm in the cross section.

A display apparatus including a flexible vibration module and a method of manufacturing the flexible vibration module are provided. A display apparatus includes: a display panel configured to display an image, and a flexible vibration module on a rear surface of the display panel, the flexible vibration module configured to vibrate the display panel, the flexible vibration module including: a plurality of first portions having a piezoelectric characteristic, and a plurality of second portions respectively between pairs of the plurality of first portions, the plurality of second portions having flexibility.

Apparatus for controlling algae and bio-organisms in bodies of fluids, such as water. The algae control system includes a power unit and a transducer unit that includes a sonic head that radiates in multiple directions. The power unit connects to various power sources, including a mains supply connection, a solar panel array, and/or a battery. The power unit is electrically connected to the transducer unit. The sonic head includes a driver and a transducer subassembly. The driver excites the transducer assembly to emit ultrasonic waves at various frequencies with varying durations of on/off periods. Emissions at a high density of frequencies are enabled by the transducers. The frequencies include the critical structural resonant frequency for each microorganism to be controlled. The power unit and driver each include a processor in communication with each other. The processors store and execute a program for a selected application configuration.

A medical ultrasonic sensor array includes a plurality of ultrasonic sensors having a plurality of first electrode plates, a plurality of piezoelectric elements, and a second electrode plate. Each of the ultrasonic sensors has a first electrode plate and a piezoelectric element sandwiched between the second electrode plate and the first electrode plate. Each first electrode plate of each ultrasonic sensor is separated from each other first electrode plate of each other ultrasonic sensor. The second electrode plate is a single body electrode plate shared by the plurality of the ultrasonic sensors. The second electrode plate includes a plurality of cavities, each cavity being formed in a surface of the second electrode plate at which the piezoelectric elements connect to the second electrode plate at a position between connection regions connecting a respective pair of the piezoelectric elements to the second electrode plate.