Initial experiments centered around the ubiquitous dual-transducer ultrasonic modules used in ... very much like a satellite TV dish. With this assembly stuck on a stepper motor to swivel it ...

More information: Jaewoo Kim et al, Enhanced dual-mode imaging: Superior photoacoustic and ultrasound endoscopy in live pigs ...

Using ultrasonic sound waves into a liquid from two or more transducers shaped to interact ... as well as the manipulation and assembly of biological tissues directly.