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Proceedings Paper

A custom-made linear array transducer for photoacoustic breast imaging
Author(s): Wenfeng Xia; Daniele Piras; Michelle Heijblom; Johan Van Hespen; Spiridon van Veldhoven; Christian Prins; Ton G. van Leeuwen; Wiendelt Steenbergen; Srirang Manohar
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Paper Abstract

A custom-made first prototype of a linear array ultrasound transducer for breast imaging is presented. Large active area transducer elements (5 mm × 5 mm) with 1 MHz resonance frequency are chosen to obtain a relatively high sensitivity. Acoustic lenses are used to enlarge the narrow acceptance angle of such transducer elements. The minimum detectable pressure, frequency bandwidth and electrical impedance of the transducer elements are characterized. The results show the transducer has a minimum detectable pressure of 0.8 Pa, which is superior than the transducers used in the Twente Photoacoustic Mammoscope system previously developed in our group. The bandwidth of the transducer is relative small, however it can be improved when using optimized matching layer thickness in future. We also observed a strong lateral resonance at 330 kHz, which may cause problems in various aspects for a photoacoustic imaging system. We discuss the future improvement and plans for the transducer optimizations.

Paper Details

Date Published: 23 February 2012
PDF: 6 pages
Proc. SPIE 8223, Photons Plus Ultrasound: Imaging and Sensing 2012, 82233D (23 February 2012); doi: 10.1117/12.908497
Show Author Affiliations
Wenfeng Xia, Univ. Twente (Netherlands)
Daniele Piras, Univ. Twente (Netherlands)
Michelle Heijblom, Univ. Twente (Netherlands)
Medisch Spectrum Twente Hospital (Netherlands)
Johan Van Hespen, Univ. Twente (Netherlands)
Spiridon van Veldhoven, Oldelft Ultrasound B.V. (Netherlands)
Christian Prins, Oldelft Ultrasound B.V. (Netherlands)
Ton G. van Leeuwen, Univ. Twente (Netherlands)
Univ. of Amsterdam (Netherlands)
Wiendelt Steenbergen, Univ. Twente (Netherlands)
Srirang Manohar, Univ. Twente (Netherlands)

Published in SPIE Proceedings Vol. 8223:
Photons Plus Ultrasound: Imaging and Sensing 2012
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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