title: The design of protection circuitry for high-frequency ultrasound imaging systems.
abstract: Transmission line lengths in the protection circuitry of a high-frequency (>20-MHz) ultrasound imaging system have an important effect on the frequency, amplitude, and bandwidth of the pulse-echo response of the system. A model that includes the transmission line lengths between the pulser, transducer, and receiver and the electromechanical properties of high-frequency transducers is used to illustrate the importance of correctly choosing these line lengths. An iterative optimization procedure for designing the protection circuitry for a broadband system is proposed. A theoretical and experimental analysis of the validity of this approach is reported for a 45-MHz PVDF transducer.
authors.affiliation: Dept. of Med. Biophys., Toronto Univ., Ont.
authors.forename: G R
authors.initials: GR
authors.lastname: Lockwood
authors.forename: J W
authors.initials: JW
authors.lastname: Hunt
authors.forename: F S
authors.initials: FS
authors.lastname: Foster