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. 2014 Oct 21;14(10):19660–19668. doi: 10.3390/s141019660

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© 2014 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 license (http://creativecommons.org/licenses/by/4.0/).

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Figure 2. — Photoacoustic (PA) and fluorescence (FL) properties of indocyanine green (ICG). (a) PA amplitudes vs. ICG concentration; (b) PA spectra of ICG by varying concentration; (c) FL intensities vs. ICG concentration; (d) FL intensities vs. LED output power.