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Anterior and posterior images of the abdomen acquired at 30 min, 1 h, 2 h and 3 h, after i.v. bolus injection of 185 MBq of 99mTc-HYNIC-IL2. Images are comparable to those obtained with 99mTc-N3S-IL2 and show no bowel excretion of radioactivity, with the kidney being the major catabolic organ. Faint spleen uptake can be observed due to the high number of IL2R +ve cells in this organ.
