On the efficacy of in-probe pre-amplifiers for piezoelectric 2D arrays

Conference paper (2020)

Authors

Enrico Boni University of Florence

F. Fool ImPhys/Medical Imaging -

M. Verweij ImPhys/Medical Imaging - , Erasmus MC

H.J. Vos Erasmus MC, ImPhys/Medical Imaging -

Piero Tortoli University of Florence

Research Group

ImPhys/Medical Imaging () (TU Delft)

3D imaging Matrix array In-probe preamplifiers Sparse array

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Published Date

2020

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Medical Imaging

Abstract

Transducer arrays for 3D imaging are characterized by elements distributed over a 2D surface. The dimensions of each element are typically one half-wavelength in both x- and y-directions. Such small elements inherently have a high electrical impedance. When the elements are connected to a probe cable, the high cable capacitance decimates the delivered voltage and results in a poor Signal to Noise Ratio (SNR). This may have dramatic effects, especially in sparse arrays, where a small number of elements contributes to the beamformed signal. In this paper we demonstrate that the use of in-probe preamplifiers in a sparse PZT probe is valuable to significantly increase the SNR.

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