Table 1.

Mean and standard deviation of the relative percent error between estimates of the model parameters ${\tau }_1^{\prime },{\mu }_{\mathrm{a},2}$, and ${\mu }_{\mathrm{s},2}^{\prime }$ predicted by minimizing L in Eq. 7 and by the direct inverse method given by Eq. 6 with respect to Monte Carlo simulations. The mean of the absolute relative error is also shown.

	Iterative method			Direct method
	Mean	Mean absolute	Std. dev.	Mean	Mean absolute	Std. dev.
${\tau }_1^{\prime }$	−11%	57%	54%	23%	43%	76%
μa, 2	1.6	14.7%	16%	−2.4%	8.0%	11%
${\mu }_{\mathrm{s},2}^{\prime }$	0.03%	4.3%	4.3%	0.03%	3.8	4.5%