1 November 2009 Spectral filtering in pulsed photothermal temperature profiling of collagen tissue phantoms
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We present an experimental comparison of pulsed photothermal (PPT) profiling in collagen-based tissue phantoms utilizing different midinfrared spectral bands. Laser-induced temperature profiles are reconstructed using a custom optimization code within the customary monochromatic approximation. Both experimental results and a detailed numerical simulation of the procedure demonstrate that, despite the associated reduction of signal-to-noise ratio, appropriate spectral filtering reduces the broadening of temperature peaks and thus improves the accuracy of temperature profiling. For our experimental system, best performance is obtained when applying a long-pass filter with cut-on wavelength at 3.4-3.8 μm. Because our collagen gel mimics infrared and thermal properties of human skin, we believe that this conclusion is transferrable to PPT radiometric profiling of human skin in vivo.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Matija Milanic, Matija Milanic, Boris Majaron, Boris Majaron, } "Spectral filtering in pulsed photothermal temperature profiling of collagen tissue phantoms," Journal of Biomedical Optics 14(6), 064024 (1 November 2009). https://doi.org/10.1117/1.3275465 . Submission:

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