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Combination of finite element simulations and linear systems theory for pulse shaping of piezoelectric transducers used in therapy

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2 Author(s)
Dreyer, T. ; Inst. fur Hochstfrequenztechnik und Elektron./Akustik, Karlsruhe Univ., Germany ; Riedlinger, R.E.

A simulation procedure is presented to calculate the focal ultrasound pressure pulse from the driving voltage of a piezoelectric composite transducer or to calculate the required voltage from a given focal pressure pulse. The description of the transducer system including the driving circuit is done by linear systems theory. A transducer transfer function is derived by transient finite element simulations of the transducer structure. Focusing is assumed to be linear, which is valid for small amplitudes. Measurements validate the model.

Published in:

Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE  (Volume:2 )

Date of Conference:

8-11 Oct. 2002

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