Quantitative Aspects of Thyroid Scintigraphy With Pertechnetate (99mTcO4) in Cats |
| |
| Authors: | Ariana MP Nap Yvonne WEA Pollak Walter E van den Brom Ad Rijnberk DVM PhD |
| |
| Institution: | Department of Clinical Sciences of Companion Animals, University of Utrecht, The Netherlands |
| |
| 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. |
| |
| Keywords: | |
|
