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https://www.healthtap.com/user_questions/160609-what-does-abnormal-uptake-on-a-thyroid-nuclear-scan-mean#:~:text=In%20the%20usa%2C%20the%20normal%20thyroid%20uptake%20range,including%3A%20grave%27s%20disease%2C%20multinodular%20toxic%20goiter%20or%20hashitoxicosis.
https://www.ncbi.nlm.nih.gov/books/NBK555978/
Normal and Critical Findings. The normal values of thyroid uptake of radiotracer are 3 to 16% at 6 hours and 8 to 25% at 24 hours. These values may change according to laboratory standard techniques or patient dietary habits. The thyroid gland can uptake more or less than normal.
https://www.uclahealth.org/endocrine-center/radioactive-iodine-uptake-test
Normal Values: 6 hours: 3 to 16% 24 hours: 8 to 25% Note: Some laboratories only measure at 24 hours. There may be some variation in values with dietary iodine ingestion and with laboratory procedural differences. What abnormal results mean: Increased (greater than 35% at 24 hours is considered elevated): hyperthyroidism; Hashimoto's thyroiditis (early)
https://www.ncbi.nlm.nih.gov/books/NBK559314/
Sample normal RAIU ranges could be 6-18% at 4 hours and 10 to 35% at 24 hours. Thyrotoxicosis can be defined as a clinical state in response to an elevated thyroid hormone, which may be due to inappropriately elevated secretion or synthesis of thyroid hormone.
https://pubmed.ncbi.nlm.nih.gov/7387268/
The normal range defined in 100 euthyroid subjects was 1% to 8.8% at two hours, and 4% to 27% for the 24-hour uptake. These results are significantly lower than observed eight years ago in this area. No relationship was noted between uptake values and thyroid indices, age, sex, ponderal index, estrogen ingestion, or urinary iodine excretion.
https://files.verywellhealth.com/Thyroid+Tests+and+Results.pdf
http://www.people.vcu.edu/~mhcrosthwait/clrs319web/Thyroid%20Uptake.pdf
> Hooper PL, Turner JR, Conway MJ, et al: Thyroid uptake of I-123 in a normal population. Arch Intern Med 140:757-758, 1980. > Anderson BG, Powsner RA: Stability of values for thyroid radioiodine uptake. J Nucl Med 37:805-806, 1996. > Normal thyroid uptake values in Denver, Colorado: 6 hours = 7-20%, 24 hours = 14-30%.
https://www.radiologyinfo.org/en/info/thyroiduptake
Thyroid Uptake. You will be given radioactive iodine (I-123 or I-131) in liquid or capsule form to swallow. The thyroid uptake will begin several hours to 24 hours later. Often, two separate uptake measurements are obtained at different times. For example, you may have uptake measurements at four to six hours and 24 hours.
https://jnm.snmjournals.org/content/59/supplement_1/1317
1317. Background: : 24-hour iodine-123 sodium iodide thyroid uptake is widely accepted as a standard measure of thyroid function in clinical practice. Previous joint publications by the American College of Radiology (ACR), Society of Pediatric Radiology (SPR), and Society of Nuclear Medicine (SNM) provide guidelines for thyroid uptake measurement and suggests an …
https://www.healthtap.com/questions/160609-what-does-abnormal-uptake-on-a-thyroid-nuclear-scan-mean/
In the usa, the normal thyroid uptake range is approximately 10-30% at 24 hours. An increased result may be due to various reasons including: grave's disease, multinodular toxic goiter or hashitoxicosis. A decreased uptake could be due to subacute thyroiditis, iodine or amiodarone induced thyrotoxicosis among others.
https://healthquestions.medhelp.org/thyroid-uptake-results
Just got my thryoid scan and uptake results today. The diagnosis section lists multinodular goiter, hyperthyroid, abnormal laboratory studies. The 24 hour uptake is 25% which is upper limits of normal range. The dominant nodule is warm.
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