Fig. 5.

Ex vivo human prostate imaging and averaging. (a,c) Multiphoton endoscopy images of prostate showing (a) a $\sim 150\times 150\mu \mathrm{m}$ field-of-view (FOV) taken at 4 fps and 50-mW excitation power at the sample. (b) Frame rate kept constant at 4 fps and excitation power reduced to 32 mW. (d) Excitation power reduced to 6 mW and 16 frames averaged at 1 fps (i.e., 16 seconds per frame). Scale bars are $20\mu \mathrm{m}$.