title: Quantitative aspects of thyroid scintigraphy with pertechnetate (99mTcO4-) in cats.
abstract: Thyroidal 99mTcO4- (pertechnetate) uptake percentages were determined in unanesthetized euthyroid (n = 13) and hyperthyroid (n = 18) cats. Maximal uptakes were observed 60 minutes after IV injection of the radionuclide and ranged from 0.3 to 3.9% of the dose in euthyroid cats (median 2.23%) and from 5.2% to 23.9% of the dose in hyperthyroid cats (median 14.8%) (P < .05). There were no overlaps in pertechnetate uptake percentages during any of the intervals evaluated. It is concluded that the optimal time for visualization of the thyroid by 99mTcO4(-)-scanning is 60 minutes after IV injection of the radionuclide. Calculation of the percentage uptake is of additional diagnostic value.
authors.affiliation: Department of Clinical Sciences of Companion Animals, University of Utrecht, The Netherlands.
authors.forename: A M
authors.initials: AM
authors.lastname: Nap
authors.forename: Y W
authors.initials: YW
authors.lastname: Pollak
authors.forename: W E
authors.initials: WE
authors.lastname: van den Brom
authors.forename: A
authors.initials: A
authors.lastname: Rijnberk
mesh_terms: D000818:Animals; D002371:Cat Diseases / Q000000981:diagnostic imaging / Q000378:metabolism*; D002415:Cats; D005260:Female; D006980:Hyperthyroidism / Q000000981:diagnostic imaging / Q000378:metabolism / Q000662:veterinary*; D008297:Male; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m / Q000493:pharmacokinetics*; D013961:Thyroid Gland / Q000000981:diagnostic imaging / Q000378:metabolism*
chemical_list: D013670:Sodium Pertechnetate Tc 99m