TECHNETIUM-99M AND IODINE-131 THYROID SCINTIGRAPHY IN NORMAL AND RADIOTHYROIDECTOMIZED COCKATIELS (NYMPHICUS HOLLANDICUS) |
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| Authors: | Craig A Harms DVM James J Hoskinson DVM David S Bruyette DVM James W Carpenter MS DVM Johna K Veatch DVM PhD |
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| Institution: | Departments of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506.;Vetorinary Diagnostic Investigation, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506. |
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| Abstract: | Thyroid scintigraphy using sodium 99mTechnetium pertechnetate (99TcO4-) was performed in normal and radiothyroidectomized cockatiels ( Nymphicus hollandicus ). 131I scintigraphy was performed in the course of ablating the thyroid glands. The thyroid glands in normal birds were clearly visualized, but were not individually resolvable. Thyroid glands were not visualized in thyroid-ablated birds. With 99mTcO4 scans, thyroid (or other region of interest)/body count density ratios were used for comparisons of normal and thyroid-ablated birds. Normal 99mTcO4- thyroid/body ratios (mean +/? SD) for the dorsal and lateral views were 1.83 +/? 0.31 and 1.70 +/? 0.34 respectively. Pertechnetate thyroid/body count density ratios decreased (to 0.93 -/?0.14 and 0.88 +/? 0.12 for dorsal and lateral views respectively) after thyroid ablation, while crop/body ratios increased. 99mTcO4- thyroid scintigraphy, therefore, was capable of detecting hypofunctional thyroid abnormalities in 131I radiothyroidectomized cockatiels. |
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| Keywords: | cockatiel Nymphicus hollandicus avian thyroid scintigraphy pertechnetate Technetium-99m Iodine-131 |
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