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Proceedings Paper

Curved-linear 128x7 two-dimensional array for 1.5D ultrasound medical imaging
Author(s): Jean Francois Gelly; Pascal Tournois; J. M. Bureau; T. Nguyen; Philippe Maurel; W. Steichen
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Paper Abstract

The potential of 1.5D ultrasonic imaging is investigated, using an elevation sampling of 7 elements (4 channels). The number of elements has been chosen in accordance with the number of channels that will be available in commercial beamformers in the future. The probe technology has been developed for curved array geometry with no limitation in radius of curvature. The transducer has been designed to introduce no limitation of electroacoustic performances, allowing fair comparison with images obtained with 1D arrays. Possible approaches for the array design are discussed. Achieved performances on prototypes of a 3.5 MHz, 40 mm radius, 128 by 7 elements, 0.5 by 2.4 mm pitch probe are presented. Electroacoustic performances are in the range of state-of-the-art 1D probes. Several figures of merit are defined and analyzed. Theoretical and experimental comparisons with 1D arrays show drastic improvement for various focusing strategies. Prototypes of curved-linear 1.5D probes with high density of elements, exhibiting performances consistent with high end diagnosis equipment, and using fabrication processes suitable for industrial production, are now available. First clinical evaluations have been conducted and confirm very promising capabilities. The results will be used for the definition of an optimized 1.5D probe family.

Paper Details

Date Published: 10 April 1997
PDF: 10 pages
Proc. SPIE 3037, Medical Imaging 1997: Ultrasonic Transducer Engineering, (10 April 1997); doi: 10.1117/12.271315
Show Author Affiliations
Jean Francois Gelly, Thomson Microsonics (France)
Pascal Tournois, Thomson Microsonics (France)
J. M. Bureau, Thomson Microsonics (France)
T. Nguyen, Thomson Microsonics (France)
Philippe Maurel, Thomson Microsonics (France)
W. Steichen, Thomson Microsonics (France)

Published in SPIE Proceedings Vol. 3037:
Medical Imaging 1997: Ultrasonic Transducer Engineering
K. Kirk Shung, Editor(s)

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