Experimental studies of near-infrared diffuse optical tomography in turbid media: distributed excitation source and periodical boundary conditions coefficient

In near-infrared diffuse optical tomography (DOT), a point excitation source model and a constant boundary conditions coefficient are usually used in image reconstruction. Here we describe an improved reconstruction algorithm that considers a distributed excitation source model and periodical boundary conditions coefficient. The improved algorithm is tested using several sets of phantom experimental data. The results show that the inclusion of the distributed source and periodical boundary conditions coefficient in our reconstruction algorithm can provide a better quality of image reconstruction, especially in terms of the reconstructed scattering coefficient value relative to that using point source and constant boundary conditions coefficient.