Fig. 3.

(a) Slices (planes) of 3D light fluence $\text{Φ}(x,y,z)$ in a scattering medium. The magnitude distribution is obtained by Monte Carlo (MC) simulation. (b) Position (axial) $z_{max}$ of the maximum optical fluence location along line $(\mathrm{0,0},z)$ when a fiber source is located at different lateral positions $(0,y\text{'},0)$. The graphs represent $z_{max}$ over $y\text{'}$ for several scattering (e.g. different ${\text{μ}}_{\text{s}}^{\text{'}}$) conditions. (c-e) Distribution of optical fluence for different ${\text{μ}}_{\text{s}}^{\text{'}}$, but fixed source position $y\text{'}$. (f-h) Distribution of optical fluence for different source position $y\text{'}$ but fixed ${\text{μ}}_{\text{s}}^{\text{'}}$. The light absorption coefficient of the medium is ${\mu }_a=$ 0.03$\text{c}{\text{m}}^{-1}.$