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Mono- versus biexponential analysis. (a) A single pixel data point from an in vivo measurement of two fluorophores (Osteosense 750 and Kodak X-Sight 761) was fit for either a single lifetime (monoexponential, resultant τ=1054) or for two a-priori lifetimes (biexponential, τ1=835 ps and τ2=1343). All data points after the dashed line (representing the time gate for fitting td) were included in the fit. (b) Residuals from fits in (a).
