7 March 2016 Discrete frequency infrared imaging using quantum cascade lasers for biological tissue analysis
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Proceedings Volume 9704, Biomedical Vibrational Spectroscopy 2016: Advances in Research and Industry; 970406 (2016); doi: 10.1117/12.2230003
Event: SPIE BiOS, 2016, San Francisco, California, United States
Abstract
Infrared (IR) spectroscopic imaging is an emerging modality for biological tissue analysis that has traditionally employed an interferometer for spectral discrimination. Recent technology developments have made discrete frequency sources, both lasers and filters, practical for imaging. The use of quantum cascade lasers in particular, presents new opportunities as well as challenges. Here we describe results from a novel point scanning confocal IR microscope and demonstrate the performance imaging several important spectral bands of lung tissue. Results show the possibility of discrete frequency (DF) absorbance measurements with RMS noise levels down to 0.34 mAU in 0.25 ms.
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Kevin Yeh, Rohit Bhargava, "Discrete frequency infrared imaging using quantum cascade lasers for biological tissue analysis", Proc. SPIE 9704, Biomedical Vibrational Spectroscopy 2016: Advances in Research and Industry, 970406 (7 March 2016); doi: 10.1117/12.2230003; http://dx.doi.org/10.1117/12.2230003
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KEYWORDS
Quantum cascade lasers

Infrared spectroscopy

Infrared imaging

Absorbance

Signal to noise ratio

Tissues

Absorption

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