TABLE 3.

Evaluation of the proposed quantification method on in vivo mouse data sets. The first column displays the subject number. The second column displays the known SPIO concentration within the tumor, calculated by diving the total nanoparticles injected by the volume measured. The third and fourth column display the average estimation and its standard deviation of the concentration from the x- and y-component of the phase gradient at four echo times, respectively.

Subject	Known Concentration (μg/ml)	From x-component (μg/ml)	From y-component (μg/ml)
1	36.5	36.0±2.6	26.6±2.2
2	33.1	40.5±3.6	47.3±4.6
3	36.5	33.8±5.4	31.7±2.1
4	42.5	38.2±3.9	43.9±5.7
5	41.2	32.8±2.0	46.7±2.0