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  Indian J Med Microbiol
 

Figure 2: Loupe image of the primary lesion and photoacoustic imaging reconstructed into a plane with different wavelengths (820 nm and 940 nm) and ratio image. (a) The primary lesion seemed to be a nodular or polypoid skin tumor with pigmentation. Histopathological diagnosis was melanoma. (b) The photoacoustic signal was effectively obtained from the site of melanin on photoacoustic imaging at 820 nm. (c) The magnitude of the photoacoustic signal on photoacoustic imaging at 940 nm was weaker than that at 820 nm. (d) The ratio image showed the melanin site in blue, indicating a significant difference in signal intensity obtained at different wavelengths

Figure 2: Loupe image of the primary lesion and photoacoustic imaging reconstructed into a plane with different wavelengths (820 nm and 940 nm) and ratio image. (a) The primary lesion seemed to be a nodular or polypoid skin tumor with pigmentation. Histopathological diagnosis was melanoma. (b) The photoacoustic signal was effectively obtained from the site of melanin on photoacoustic imaging at 820 nm. (c) The magnitude of the photoacoustic signal on photoacoustic imaging at 940 nm was weaker than that at 820 nm. (d) The ratio image showed the melanin site in blue, indicating a significant difference in signal intensity obtained at different wavelengths