Patients received a SPECT scan at three different moments: 1) after intravenous injection of albumin colloid (99mTc-albumin colloid) to localize the metastatic tumors, 2) after injection of radiolabeled albumin microspheres (99mTc-MSA) prior to the infusion of AT-II, and 3) after injection of 99mTc-MSA, immediately after the hepatic arterial infusion of AT-II at a rate of 10 μg/min for 100 seconds. Here, TPO is linked to metastatic neoplasm.