A treatment method and system using high-frequency ultrasound for treating a waste stream containing per- and polyfluoroalkyl substance (PFAS) is disclosed. The system has one or more reactors including one or more transducers configured to operating at one or more frequencies to destroy or mineralize the per- and polyfluoroalkyl substances (PFAS) in the waste stream using sonolysis.

A transducer assembly comprises a housing and a plurality of frequency steered transducer array elements. Each of the transducer array elements includes a plurality of piezoelectric elements. The frequency steered transducer array elements are configured to receive a transmit electronic signal including a plurality of frequency components and to transmit an array of sonar beams into a body of water. Each sonar beam is transmitted in an angular direction that varies according to one of the frequency components of the transmit electronic signal. The frequency steered transducer array elements are positioned within the housing in a fan-shaped configuration where an end section of at least two of the frequency steered transducer array elements are within an intersection range of each other.

A compact ultrasonic transducer for an ultrasonic surgical instrument includes a proximal casing defining a hollow interior and a piezoelectric rod array including a plurality of piezoelectric rods radially spaced-apart from one another and arranged in a longitudinally-oriented direction. The piezoelectric rod array is disposed within the hollow interior. The compact ultrasonic transducer further includes a distal horn including a distal connector configured to engage a waveguide. The distal horn is configured to engage the proximal casing to enclose the piezoelectric rod array within the hollow interior. An ultrasonic surgical instrument including the compact ultrasonic transducer is also provided.

The present disclosure is generally directed to an ultrasonic transducer interface system for use within portable 2-D ultrasonic imagers and includes an on-chip adaptive beamformer and Charge-Redistribution TX (CR-TX) to provide a drive strength of up to 500 pF/channel at 5 MHz (or 10 nF at 250 kHz) while reducing the TX drive power by at least 30% compared to other ultrasonic transducer TX drivers. The ultrasonic transducer interface system can be implemented in a single chip via, for example, a complementary metal oxide semiconductor (CMOS) process.

An ultrasound probe includes a first assembly having a first case, a second assembly coupled with the first assembly, having a second case, and configured to be rotatable between a first position of being unfolded with respect to the first assembly and a second position of being folded on the first assembly, a first acoustic module disposed in the inside of the first case, a second acoustic module disposed in the inside of the second case, and a first space reducing portion disposed in at least one of a portion of the first case toward the second assembly and a portion of the second case toward the first assembly, and configured to reduce a space between the first acoustic module and the second acoustic module when the second assembly is at the first position.

An ultrasonic transducer array includes a plurality of functional micromachined ultrasonic transducers (MUTs), each having a cavity of a first diameter. One or more groups of non-functional MUTs are disposed about a perimeter of the functional MUTs, the one or more groups of non-functional MUTs having a cavity of a second diameter that is smaller than the first diameter.

Systems and methods for non-invasive fat reduction can include targeting a region of interest below a surface of skin, which contains fat and delivering ultrasound energy to the region of interest. The ultrasound energy generates a thermal lesion with said ultrasound energy on a fat cell. The lesion can create an opening in the surface of the fat cell, which allows the draining of a fluid out of the fat cell and through the opening. In addition, by applying ultrasound energy to fat cells to increase the temperature to between 43 degrees and 49 degrees, cell apoptosis can be realized, thereby resulting in reduction of fat.

An ultrasonic surgical instrument is disclosed including a handle including a pivoting handle portion, an end effector configured to treat tissue, a waveguide extending to the end effector, a battery and a vibration generating system selectively operable in a plurality of energizing operating states. The plurality of energizing operating states consists of a first operating state in which a first power is supplied to the end effector and a second operating state in which a second power is supplied to the end effector. The first power is different than the second power. The vibration generating system includes a transducer selectively attachable to the handle and a switch configured to operably switch the vibration generating system between the first operating state and the second operating state. The switch is further configured to operably switch the vibration generating system between the plurality of energizing operating states and a non-energizing operating state.

Various methods and systems are provided for a transducer for a deployable catheter. In one example, a method for forming the transducer includes coupling an acoustic stack to a shape memory material while in a planar configuration to form a transducer and exposing the shape memory material to a curling stimulus to adjust the transducer to a curved configuration.

A thermoacoustic transducer integrating at least one piezoelectric element having a first surface and a second surface, a potential electrode that is electrically connected to the second surface, a ground electrode that is electrically connected to the first surface, a switch electrically connected to both the potential electrode and the ground electrode, a timer configured to match a pulse emanating from a radio-frequency emitter, further wherein the potential electrode and the ground electrode are electrically connected through an impedance when the switch is in an active state, further wherein the potential electrode and the ground electrode are not electrically connected when the switch is in an inactive state; and a housing accommodating the at least one piezoelectric element, potential electrode, ground electrode, and switch.