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https://jnm.snmjournals.org/content/50/supplement_2/2202#:~:text=In%20standard%20protocol%2C%20normal%206%20hour%20uptake%20values,hour%20uptake%20values%20have%20a%20range%20of%2010-30%25.
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/pmc/articles/PMC1501450/
THYROID DISEASE. EVALUATION OF THE SIX-HOUR I-131 UPTAKE TEST FOR THE DIAGNOSIS OF THYROID DISEASE. J Kans Med Soc. 1963 Oct; 64:434–437. [Google Scholar] IBARRA JD, Jr, THOMPSON JQ, ALEXANDER JS, PETRANY Z. Radioiodine tracer tests in the evaluation of thyroid function. Results of 6-hour and 24-hour uptake determinations in 357 patients.
https://medlineplus.gov/ency/article/003689.htm
These are normal results at 6 and 24 hours after swallowing the radioactive iodine: At 6 hours: 3% to 16%. At 24 hours: 8% to 25%. Some testing centers measure only at 24 hours. Values may vary depending on the amount of iodine in your diet. Normal …
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 …
https://files.verywellhealth.com/Thyroid+Tests+and+Results.pdf
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 …
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://roentgenrayreader.blogspot.com/2010/07/thyroid-radioiodide-uptake-raiu-curves.html
Thyroid uptake may be quantified at 4-6 hours and at 24 hours. The gray bars define the rough normal ranges at 4-6 hours (5%-20%) and 24 hours (10%-35%). Hyperthyroid patients will have elevated 4-hour uptake values. In cases of rapidly …
https://healthquestions.medhelp.org/thyroid-uptake-results
The uptake of the scan was measured at 6 hours and 24 hours. at 4 hours, 4.5 of activity was recorded but at 24 hours only 1% of activity was recorded. These values are below the limits of normal and suggest that the thyroid gland has been blocked. I just had a uptake scan, prior to this my labs came back normal.
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.
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