Inductive tuning system for ultrasound transducer

A method for forming a tuned ultrasound transducer assembly and assembling the tuned ultrasound transducer assembly into a medical device, the medical device having an ultrasound transducer controller, the method comprising:

• selecting a tuning assembly that is adjustable to provide a selected inductance value from at least three different inductance values, at least one of the at least three different inductance values being appropriate to the operation of a transducer, the transducer having an input side, the transducer being operable to produce a cyclic sound pressure output with a frequency of at least 20 kilohertz, the tuning assembly including a switch and a plurality of tuning inductors, the switch including a first connection and a plurality of second connections, the switch having at least three positions, each position being operable to selectively connect the first connection with any one of at least three different combinations of the second connections including a combination connecting the first connection to at least two of the second connections, each of the second connections being connected to at least one of the tuning inductors so that the switch is operable to select which subset of the tuning inductors is connected to the first connection so as to provide the selected inductance value;
• electrically connecting the ultrasound transducer controller with the transducer input side via an input electrical conductor;
• and
• electrically connecting the tuning assembly between the input electrical conductor and a ground potential so as to provide the selected inductance between the input electrical conductor and the ground potential, the ultrasound transducer controller and the transducer being electrically coupled with the ground potential.