Fig. 1.

a) example autofluorescence image obtained from a dysplastic nevus ex vivo. Scale bar 50 µm. b) shows the same data as a) but with the manually defined cellular regions of interest overlaid in green. c-top) shows the spatially integrated fluorescence decay profile obtained in the blue channel from a defined cellular region of interest (black dots) together with the instrument response function (blue) and double exponential fit to the data (green). c-bottom) shows the weighted residuals of the fit to the experimental data.