Forward and side looking ultrasonic imaging

Details Forward and side looking ultrasonic imaging Forward and side looking ultrasonic imaging

B - Operations, Transporting

06

B

B06B 1/06 (2006.01) A61B 8/12 (2006.01)

Patent

CA 2395631

An ultrasound transducer array (408) includes at least one transducer element (412) having a first (604) and second (606) portions separated by an acoustical discontinuity (520). The first portion (604) has the desired length to form a half-wave k31 resonance, while the second portion (606) has a resonant length for an undesired very low frequency out-of-band k31 resonance. The thickness of the transducer element (412) is designed for k33 half- resonance. Given the design, the transducer element (412) can operate and provide for both forward-looking (514) and side looking (512) elevation apertures. A method is also disclosed for using the disclosed ultrasound transducer (412) in ultrasound imaging.

L'invention concerne un réseau (408) de transducteurs ultrasonores comprenant au moins un élément transducteur (12) dont une première (604) et une seconde (606) parties sont séparées par une discontinuité acoustique (520). La première partie (604) a la longueur voulue pour former une résonance k31 demi-onde, tandis que la seconde partie (606) possède une longueur de résonance k31 hors bande à fréquence extrêmement basse non voulue. L'épaisseur de l'élément transducteur (412) est conçue pour une demi-résonance k33. Etant donné sa conception, l'élément transducteur (412) peut fonctionner et assurer à la fois des ouvertures d'élévation avant (514) et latérale (512). L'invention concerne également un procédé d'utilisation dudit transducteur ultrosonore (412) en imagerie ultrasonore.

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