Intra-arterial infusion of N-isopropyl-p[123I]iodoamphetamine for assessing effective blood supply to pulmonary and hepatic neoplasms.
The biodistribution and pharmacokinetics of intra-arterially administered N-isopropyl-p[123I] iodoamphetamine (123I-IMP) were prospectively evaluated in 38 patients with histologically proven pulmonary or hepatic tumors. Intra-arterially infused 123I-IMP was distributed initially in peripheral tissues in which the blood supply was maintained. Its concentration in malignant neoplasms was demonstrated to be higher than in normal tissues. In pulmonary cancer, the tumor uptake of the administered dose without a tissue attenuation correction (% uptake) of 123I-IMP at 1-2 min after injection was 14.7 +/- 5.7% (s.d.). The tumor to normal tissue ratio was 2.1 +/- 0.7 in hepatocellular carcinoma and 1.4 +/- 0.7 in metastatic tumors. The biodistribution of 123I-IMP was also compared to that of 99mTc-macroaggregated albumin (99mTc-MAA) in 9 cases of hepatic cancer. The distribution of 123I-IMP resembled that of 99mTc-MAA in 5 cases and was different in 4 cases. 123I-IMP was more concentrated in the tumor than 99mTc-MAA. Intra-arterial infusion scintigraphy with 123I-IMP seems to provide information on effective blood supply to neoplasms which are targeted in interventional radiology.
Miyazaki
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Department of Diagnostic Radiology, Sapporo City General Hospital, Japan.
D000328:Adult; D000368:Aged; D000662:Amphetamines; D001981:Bronchial Arteries; D005260:Female; D006499:Hepatic Artery; D006801:Humans; D007261:Infusions, Intra-Arterial; D007457:Iodine Radioisotopes; D020367:Iofetamine; D008113:Liver Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000556:secondary; D008175:Lung Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000556:secondary; D008875:Middle Aged; D011446:Prospective Studies; D011877:Radionuclide Imaging; D013668:Technetium Tc 99m Aggregated Albumin; D014018:Tissue Distribution
D000662:Amphetamines; D007457:Iodine Radioisotopes; D013668:Technetium Tc 99m Aggregated Albumin; D020367:Iofetamine