TABLE 2.

The performance of the proposed quantification method on the phantom data set with different masks. The first column shows the vial number. In the second column, information about size changes of the masks used in the calculation of the concentration is shown. Values of +10% correspond to the mask dilated so that it was 10% larger than the original mask. Values of −10% correspond to the mask eroded so that it was 10% smaller than the original mask. The third column displays the known concentration in each vial. The fourth column displays the concentration estimations from the x-component of the phase gradient map and the fifth column displays the concentration estimations from the y-component of the phase gradient map.

Vial	Mask	Known Concentration (μg/ml)	From x-component (μg/ml)	From y-component (μg/ml)
1	+10%	160	123.2	162.9
	−10%	160	176.9	228.0
2	+10%	80	58.3	71.3
	−10%	80	83.6	99.0
3	+10%	40	30.3	36.8
	−10%	40	44.7	52.1