Impulse response estimation method for ultrasound arrays
| Autor: | Pieter Kruizinga, Pim van der Meulen, Johannes G. Bosch, Geert Leus |
|---|---|
| Přispěvatelé: | Cardiology |
| Rok vydání: | 2017 |
| Předmět: |
Finite impulse response
business.industry Computer science Acoustics Ultrasound 010103 numerical & computational mathematics Impulse (physics) 01 natural sciences Transfer function Transducer Surface wave 0103 physical sciences 0101 mathematics business 010301 acoustics Digital filter Impulse response Linear filter |
| Zdroj: | 2017 IEEE International Ultrasonics Symposium (IUS) |
| Popis: | We present a method for estimating the one-way electro-mechanical impulse response or transfer function of self-reciprocal ultrasound transducers. The one-way impulse response is needed for forward field simulations, or for pulseecho simulations and excitation code design when the oneway impulse response per array element is different. Using a flat plate reflector that is positioned parallel to the transducer surface, the resulting pulse-echo signal is measured. Since the transducer is self-reciprocal, the transmit and receive impulse responses are equivalent. Consequently, the measured signal is the autoconvolution of the one-way impulse response. We propose a new de-autoconvolution algorithm to obtain the one-way impulse response from such a signal. The proposed measurement procedure is especially time-efficient for large arrays, and does not rely on hydrophones or additional transducers. Experimental results are shown to demonstrate the effectiveness of the proposed method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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