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QUALITATIVE AND QUANTITATIVE THYROID IMAGING IN FELINE HYPERTHYROIDISM USING TECHNETIUM‐99M AS PERTECHNETATE
Author(s) -
Mooney Carmel T.,
Thoday Keith L.,
Nicoll Jeremy J.,
Doxey David L.
Publication year - 1992
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.1992.tb00149.x
Subject(s) - pertechnetate , medicine , euthyroid , thyroid , cats , nuclear medicine , technetium 99m , technetium , collimator , endocrinology , scintigraphy , physics , optics
Thyroid imaging using technetium‐99m as pertechnetate ( 99m TcO 4 ) was carried out in five healthy, euthyroid and 37 hyperthyroid cats using both pinhole and parallel‐hole collimators. Images of greater resolution, necessary to distinguish bilateral lobe involvement, were obtained using the pinhole collimator. Per cent thyriod 99m TcO 4 ‐ uptake was calculated in each cat and was significanly (P < 0.001) higher in hyperthyroid compared with euthyroid cats. In the hyperthyroid cats, per cent thyroid uptake was significantly correlated with serum total thyroxine (T4) and triiodothyronine (T3) Concentrations. Per cent thyroid 99m TcO 4 ‐ uptake is increased in feline hyperthyrodism and may be calculated using a pinhole collimator alone at the time of qalitative assessment of the extent of thyroid tissue involvement.