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. 2019 Nov 27;10(12):820. doi: 10.3390/mi10120820

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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US/PA images of a vasculature-mimicking phantom. (A) Image of the phantom with a yellow dashed rectangle (6 mm × 12.695 mm) indicating the US/PA imaging region. (B) US MAP image of the phantom. (C) PA MAP image of the phantom at an excitation wavelength of 750 nm. (D) Proportional PA MAP image (PA850/PA750) of the phantom. The scanning step size and scanning speed were 0.1 mm and 2 mm/s, respectively, for panels B, C and D. (E) Overlaid US/PA MAP images of the phantom. US, ultrasound; PA, photoacoustic; PA750, PA signal at a 750-nm excitation wavelength; PA850, PA signal at an 850-nm excitation wavelength; MAP, maximum amplitude projection.

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