Title :
Combination of finite element simulations and linear systems theory for pulse shaping of piezoelectric transducers used in therapy
Author :
Dreyer, Thomas ; Riedlinger, Rainer E.
Author_Institution :
Inst. fur Hochstfrequenztechnik und Elektron./Akustik, Karlsruhe Univ., Germany
Abstract :
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.
Keywords :
biomedical transducers; biomedical ultrasonics; finite element analysis; piezoelectric transducers; ultrasonic transducers; driving circuit; finite element simulations; focal ultrasound pressure pulse; linear systems theory; piezoelectric transducers; pulse shaping; therapy; transducer transfer function; Circuit simulation; Finite element methods; Linear systems; Medical treatment; Piezoelectric transducers; Pulse shaping methods; Transfer functions; Ultrasonic imaging; Ultrasonic transducers; Voltage;
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
Print_ISBN :
0-7803-7582-3
DOI :
10.1109/ULTSYM.2002.1192529
