Abstract

Translucent phantoms hidden in thick Intralipid scattering solutions have been imaged as a function of phantom scattering coefficient and optical density using picosecond time and spatial gated Kerr-Fourier transillumination imaging system. Weakly-absorbing phantoms of 0.25-mm width black/white bars with the opacity difference of OD=0.14 can be distinguished through a 50-mm highly scattering Intralipid solution. For translucent scattering phantoms, such as droplets and phantom cell, less than 5% differential concentration of a 2-mm thick phantom cell can be distinguished from the background medium with the absolute signal difference of 10⁻¹⁰ of the incident illumination intensity.

© 1994 Optical Society of America