Spectroscopy and Imaging with Diffusing Light

MAR 01, 1995

Diffusing near‐infrared light provides new mechanisms for clinical diagnosis of tissue structure and function.

Arjun Yodh

Britton Chance

Visually opaque media are ubiquitous in nature. While some materials are opaque because they strongly absorb visible light, others, such as loam, white paint, biological tissue and milk, are opaque because photons traveling within them are predominantly scattered rather than absorbed. A vanishingly small number of photons travel straight through such substances. Instead, light is transported through these materials in a process similar to heat diffusion (figure 1).

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More about the Authors

Arjun Yodh. University of Pennsylvania, Philadelphia.

Britton Chance. University of Pennsylvania, Philadelphia.