Time apodization of ultrasonic transducer arrays

Gabriella Cincotti; Giovanni Cardone; Paola Gori; Francesco Pomata; Massimo Pappalardo

doi:10.1117/12.350664

21 June 1999 Time apodization of ultrasonic transducer arrays

Gabriella Cincotti, Giovanni Cardone, Paola Gori, Francesco Pomata, Massimo Pappalardo

Proceedings Volume 3664, Medical Imaging 1999: Ultrasonic Transducer Engineering; (1999) https://doi.org/10.1117/12.350664
Event: Medical Imaging '99, 1999, San Diego, CA, United States

Abstract

A new apodization technique to enhance the contrast resolution of medical ultrasonic imaging systems is presented. It can easily be implemented on any commercial transducer array. The array aperture windowing in the transmitting mode is performed without modifying the driver voltage over the whole array, but only varying the driving pulse length from an element to another. A design curve has been determined which transforms any conventional amplitude apodization into a `time apodization'. Experimental and numerical results are given for a 3.5 MHz convex array and for a 2.5 MHz phased array. They demonstrate the effectiveness of this method in reducing the off-axis energy in the radiated pattern. Moreover, they point out that `time apodization' improves also the range resolution, since the overall length of the ultrasonic pulse transmitted by the probe is reduced.

Citation Download Citation

Gabriella Cincotti, Giovanni Cardone, Paola Gori, Francesco Pomata, and Massimo Pappalardo "Time apodization of ultrasonic transducer arrays", Proc. SPIE 3664, Medical Imaging 1999: Ultrasonic Transducer Engineering, (21 June 1999); https://doi.org/10.1117/12.350664

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