Transmitting acoustic and electromagnetic signals from a catheter balloon

A catheter, comprising:

• multiple transducers, the transducers being arranged to surround a longitudinal axis of the catheter, and each of the transducers being configured to transmit an acoustic signal;
• and
• a pair of the transducers adjacent to one another along the longitudinal axis of the catheter, the pair of transducers each having an end arranged such that the ends are adjacent to one another along the longitudinal axis of the catheter,
• wherein each of the transducers in the pair of transducers has a thickness that tapers toward the adjacent end of the transducer, and
• wherein the pair of transducers are tapered in a same direction, such that the thickness of both transducers tapers toward an inner surface of the transducers.

A method of treating a treatment site, the method comprising:

• advancing a catheter to the treatment site, the catheter comprising:
• multiple transducers, the transducers being arranged to surround a longitudinal axis of the catheter;
• and
• a pair of the transducers adjacent to one another along the longitudinal axis of the catheter, wherein each of the transducers in the pair of transducers has a thickness that tapers toward an adjacent end of the transducer, and
• wherein the pair of transducers are tapered in a same direction, such that the thickness of both transducers tapers toward an inner surface of the transducers;
• and
• transmitting an acoustic signal from the multiple transducers to the treatment site.