Calculation and usage of the thyroid to background ratio on the pertechnetate thyroid scan.

@article{Wallack2010CalculationAU,
  title={Calculation and usage of the thyroid to background ratio on the pertechnetate thyroid scan.},
  author={Seth T Wallack and Michelle D. Metcalf and Angela Skidmore and C R Lamb},
  journal={Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association},
  year={2010},
  volume={51 5},
  pages={554-60}
}
Feline hyperthyroidism is a common endocrine disorder. A single dose of 148MBq (4mCi) 131I is 95-98% effective for the treatment of hyperthyroidism in cats; however, the cause for treatment failures has not been determined. In a series of 113 hyperthyroid cats having pertechnetate thyroid scintigraphy before treatment using a standard 148MBq (4mCi) 131I dose, the thyroid to salivary gland (T:S) ratio and the thyroid to background (T:B) ratio were calculated. Results in 107 (95%) cats… CONTINUE READING