Photoacoustic spectral analysis (PASA) involves shining laser pulses of various wavelengths at a target tissue and measuring the generated ultrasonic waves with a hydrophone. (IMAGE)

SPIE--International Society for Optics and Photonics

Photoacoustic spectral analysis (PASA) involves shining laser pulses of various wavelengths at a target tissue and measuring the generated ultrasonic waves with a hydrophone.

Caption

Photoacoustic spectral analysis (PASA) involves shining laser pulses of various wavelengths at a target tissue and measuring the generated ultrasonic waves with a hydrophone. These signals reveal semi-quantitative information about the composition of the tissue, such as its collagen and lipid content, which can be associated with diseases such as cancer.

Credit

Zhang et al., doi 10.1117/1.JBO.28.6.065004.

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