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Time-resolved fluorescence measurements have been performed on benign and malignant breast tissue samples using 310 excitation of a 100 fs pulse. Fluorescence decay times were found to be double exponential. The 340nm band of benign and malignant tissues displayed differences in the slow components of lifetime and the ratio of the fast to the slow components.

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The optical density of breast tissues without blood is found to be relatively constant from 320 to 800 nm, indicating a relatively independent scattering cross section over this wavelength region.