1 September 2006 Decay of photoacoustic signals from biological tissue irradiated by near infrared laser pulses
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Abstract
We describe the phenomenon of a sudden decrease in the amplitude of photoacoustic signals arising from nanosecond laser pulse irradiation of biological samples, measured in vitro. Several dental enamel and chicken/turkey breast samples are examined. Moderate optical energy densities (i.e., about 300 mJ/cm2) are used, typical of those exploited in photoacoustic investigations. Measurements show a rapid decay of photoacoustic signals within the first few laser pulses absorbed by the sample. This phenomenon indicates that laser irradiation interacts with biological samples, causing long-term physical changes that can be attributed to a reduction of optical absorption within the samples.
© (2006) Society of Photo-Optical Instrumentation Engineers (SPIE)
Grzegorz Gondek, Grzegorz Gondek, Teng Li, Teng Li, Richard Lynch, Richard Lynch, Richard J. Dewhurst, Richard J. Dewhurst, } "Decay of photoacoustic signals from biological tissue irradiated by near infrared laser pulses," Journal of Biomedical Optics 11(5), 054036 (1 September 2006). https://doi.org/10.1117/1.2360690 . Submission:
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