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. 2015 Dec 24;3:22. doi: 10.1186/s40349-015-0044-5

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© Magnin et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — ARFI imaging and focal spot positioning procedure. Step 1: an anatomy image and an ARFI image are acquired and reconstructed in real time. Step 2: the target is chosen on the anatomy image (a, blue arrow), while the current position of the focal spot is determined using the ARFI phase image (b). Step 3: a feedback on the motors allows reaching the previously defined target location (b, red arrow). Step 4: the phase of an ARFI image acquired after the transducer displacement allows verifying that the desired target location has been reached (c, blue arrow)