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Normalized PA signal of seed embedded in gelatin (a - red square) and embedded in excised bovine prostate (a - blue circle) and contrast spectrum of seed embedded in prostate sample (b). Proximal end of seed is embedded approximately 1 mm from prostate tissue surface (in direction of laser source). Note for the prostate tissue experiment (i.e., blue circle), data file obtained at 830 nm was corrupt and was thus omitted from analysis.
