Conclusions
A new processing method for extracting the complex spatial field, in terms of amplitude and phase, from a proper phase-quadrature sampling of the time field behavior at different spatial points, has been presented. The method has been verified only in the case of spherically focused circular transducers employing time signals acquired by a needle type hydrophone connected a digital oscilloscope, providing an appropriate sampling rate, and a precise (low-jitter) triggering between excitation and field data acquisition.
The same transducers have been properly simulated, and from the time-space field variation, the space dependent amplitude and phase has been extracted through the same method here presented.
Although a thorough validation has still to be done, the measured results seems in good agreement with the expected (simulated) data, suggesting therefore the correctness of the measurement method.
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© 2002 Kluwer Academic Publishers
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Guidi, G., Falteri, S., Maione, E. (2002). A New Method for Measuring Ultrasound Beams Phase Distribution. In: Halliwell, M., Wells, P.N.T. (eds) Acoustical Imaging., vol 25. Springer, Boston, MA. https://doi.org/10.1007/0-306-47107-8_18
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DOI: https://doi.org/10.1007/0-306-47107-8_18
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