Spatial resolution and scanning time in the optical tomography of absorbing `phantoms' under multiple scattering conditions

摘要

Photon-counting optical tomography was used in the visualisationand projective reconstruction of the image of strongly absorbinginclusion ( a ( a 'phantom'), 6 mm in diameter, hidden by multiplescattering processes in a model object (diameter 140 mm, absorptionand scattering coefficients 0.005 and 1.4 mm~-1, respectively). Itwas demonstrated experimentally that when the probe radiation powerwas 10-13 mW the minimal (corresponding to the poorest signaloiseratio ～1) measurement time (photon-counting time ) was 0.8 s per onemeasurement point and the total time needed to scan the whole objectwas less than 410 s.