tissue lion is traveling through and that gives you a problem that's gonna cause distortion and preventing us from forming a good image right so that problem was overcome about maybe 20 years ago using modern optical microscopy you might have heard of a confocal microscopy two-photon microscopy or even optical coherence tomography these are really modern wonders of optical imaging technologies those technologies will reject multiple scattered photons they'll retain the on scattered or singly back scattered photons for imaging and there was