Fig. 7

The similar pattern obtained from both modeling and experimental data to show the temporal and spatial profile of iodine concentration in the selected line (Fig. 3e: b-d). Model d0, d5, d15, d30 correspond with scans N, (A/B), C, and D respectively. Obs d0, d5#1, d5#2, d15, and d30 are the concentrations of iodine estimated through measurement of CT values in scans of N, A, B, C, and D. Note: because not much staining effect increase occurred between scan A and scan B, and no additional iodine was added to the system, the staining period between scan A (day 5) and the day the solution was first replaced (day 24), was treated as an ineffective staining interval. Therefore, scans A and B were treated as equivalent to day 5 in the modeling scenario. This ineffective staining interval was subtracted from the actual staining duration in the modeling for scans C and D (15 days and 30 days). By this recalibration of staining duration, a constant flux at the boundary condition in the model is generally expected to be met by maintaining the solution concentration in a certain level. Zone 1, Zone 2 and Zone 3 were labeled along the X axis