Original Research
Thyroidal radioisotope uptake in euthyroid cats : a comparison between 131I and 99MTcO4
Journal of the South African Veterinary Association | Vol 68, No 2 | a866 |
DOI: https://doi.org/10.4102/jsava.v68i2.866
| © 1997 N. Lambrechts, M.M. Jordaan, W.J.G. Pilloy, J. Van Heerden, R.P. Clauss
| This work is licensed under CC Attribution 4.0
Submitted: 13 July 1997 | Published: 13 July 1997
Submitted: 13 July 1997 | Published: 13 July 1997
About the author(s)
N. Lambrechts,M.M. Jordaan,
W.J.G. Pilloy,
J. Van Heerden,
R.P. Clauss,
Full Text:
PDF (1MB)Abstract
Two thyroidal evaluation systems in euthyroid cats (n = 12) were compared. A single, confirmed hyperthyroid cat was included for interest. Firstly, thyroidal uptake of an intravenous bolus of approximately 111 MBq (3 mCi) 99MTcO4- was estimated by using a scintillation camera and calculating the ratio of thyroid to salivary activities at 20 min and 4 h. Thyroid to salivary activity ratios were 1:1 at 20 min and 2:1 at 4 h. Two discrete areas of salivary uptake were identified, namely a parotid/mandibular complex and a more rostral buccal/sublingual complex. These results were compared to radioiodine uptake of an oral dose of approximately 0.925 MBq (25 mCi) 131I using a standard thyroid uptake system, measured at 1, 2, 4, 6, 8, 10, 12, 24 and 48 h after administration. Mean radioiodine thyroidal uptake started at 33 % at 1 h, stabilised at 21 % between 4 and 24 h, and dropped to 18 % at 48 h. There was a significant correlation between the early thyroid:salivary ratio of the parotid/mandibular complex and the radioiodine uptake at 12 h.
Keywords
Cat; Thyroid; Thyroid Uptake System; 131I; 99MTcO4
Metrics
Total abstract views: 2881Total article views: 2874
Crossref Citations
1. Effect of four sedative and anesthetic protocols on quantitative thyroid scintigraphy in euthyroid cats
Irene A. Schaafsma, Yvonne W. E. A. Pollak, Paul Y. Barthez
American Journal of Veterinary Research vol: 67 issue: 8 first page: 1362 year: 2006
doi: 10.2460/ajvr.67.8.1362