Journal of Investigative Dermatology

FIGURE 1

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A Comparative Study of Photoacoustic and Reflectance Methods for Determination of Epidermal Melanin Content

John A Viator, Jason Komadina, Lars O Svaasand, Guillermo Aguilar, Bernard Choi and J Stuart Nelson

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Figure 1.

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Photoacustic generation in planar gels (Top) An acoustic wave generated by irradiating a 185 per cm gel. The negative wave (B) following the positive wave (A) is a reflected tensile wave resulting from acoustic mismatch of the gel/air boundary. (Bottom) The absorption information of the acoustic wave is shown here as pressure as a function of gel depth. The apparatus is shown toward the right.

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