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. 2024 Aug 6;15:6691. doi: 10.1038/s41467-024-50923-8

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

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Fig. 3 — a Side view of the observation setup including a high-speed camera to capture the HDSP printing process. b, c Normalized measured pressure maps of designed two- and three-spot pressure images, respectively. The gap between each two spots is 3 mm in (b) and 4 mm in (c). d Footage of high-speed imaging for two spots being printed with HDSP process during 1 s insonication. e Footage of high-speed imaging for three-spot printing during 1 s insonication. In all cases the platform (image plane) is designed to be 20 mm away from the transducer, printing parameters: OD = 25 mm, P = 5 W, f₀ = 2.24 MHz, DC = 50%.