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. 2021 May 3;118(18):184102. doi: 10.1063/5.0044512

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© 2021 Author(s).

© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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FIG. 1. — (a) Measurement system of acoustic radiation force (ARF) of a ultrahigh frequency transducer is composed of (1) a pushing transducer (PUT) with (b) the center frequency of 130 MHz, (2) a tracking transducer (TUT) with (b) the center frequency of 45 MHz, (3) a solid sphere, (4) gelatin phantom block, (5) water cuvette, (6) function generator, (7) pulser/receiver, and (8) power amplifier. Red arrows indicate a sequence for pushing triggering to generate ARF in (c), and green arrows indicate a sequence for tracking triggering to generate tracking pulses in (c). (c) When a sphere is moving under ARF from PUT, $Δ t$ changes. V_pp is peak-to-peak voltage, and t_p is the pulse duration of ARF pulse. Pulse and echoes were saved for post-processing to reconstruct the displacement of a sphere ball using cross-correlation method.