Figure 4: Anterior view of the Maximum Intensity Projection of 99mTc-MAA SPECT of a same patient who underwent two 99mTc-MAA-simulations before SIRT of a spleen : without (a) and with (b) prior oral administration of perchlorate. The physiological uptake of free 99mTc seen in the gastroduodenal wall is completely supressed by the perchlorate.