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 visualisation and projective reconstruction of the image of strongly absorbing inclusion ( a ( a 'phantom'), 6 mm in diameter, hidden by multiple scattering processes in a model object (diameter 140 mm, absorption and scattering coefficients 0.005 and 1.4 mm~-1, respectively). It was demonstrated experimentally that when the probe radiation power was 10-13 mW the minimal (corresponding to the poorest signaloise ratio ～1) measurement time (photon-counting time ) was 0.8 s per one measurement point and the total time needed to scan the whole object was less than 410 s.