Fully sampled 3600 element two dimensional transducer array for low cost C-scan imaging

Matthew Eames; Shiwei Zhou; John Hossack

doi:10.1117/12.661500

16 March 2006 Fully sampled 3600 element two dimensional transducer array for low cost C-scan imaging

Matthew Eames, Shiwei Zhou, John Hossack

Proceedings Volume 6147, Medical Imaging 2006: Ultrasonic Imaging and Signal Processing; 61470S (2006) https://doi.org/10.1117/12.661500
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Preliminary results relating to the design, fabrication, and characterization of a 3600 (60 x 60) element, fully sampled, 5 MHz two dimensional (2D) array are presented. The viable element yield of the new array was estimated at 98.3%. Single-element pulse-echo experiments indicate that the center frequency is 4.7 MHz - 7.8% below the resonant frequency determined by Finite Element Analysis (FEA) simulation. Pulse-echo signal fractional bandwidth was measured to be 60.3% at the -6 dB level. Ringdown was longer than anticipated in experimental pulse echo voltage waveforms, which we attribute in part to a lack of matching layer and a low-loss backing material. Based on plane-wave pulse-echo experiments in a water-tank, single element signal-to-noise ratio (SNR) was calculated to be 6.0 when using a plane-wave transmit (all elements excited). Experimental angular beam patterns were more directional than predicted with the standard soft-baffle equation, but in good agreement with FEA simulations that take account of finite acoustic crosstalk.

Citation Download Citation

Matthew Eames, Shiwei Zhou, and John Hossack "Fully sampled 3600 element two dimensional transducer array for low cost C-scan imaging", Proc. SPIE 6147, Medical Imaging 2006: Ultrasonic Imaging and Signal Processing, 61470S (16 March 2006); https://doi.org/10.1117/12.661500

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