How will a radioactive iodine uptake test diagnose goiter?

It will not. An i131 test does not "diagnose" goiter. Goiter is just a term meaning an enlarged and/or nodular thyroid. An i131 scan is a "fucntional" scan. It is used to determine if a nodule within the thyroid is "hot" - picks up a lot of iodine: hyper-metabolic. A "cold" nodule does not concentrate the iodine: hypometabolic. There is a lower risk of thyroid cancer in "hot" nodules.
Determines size... And function. The uptake portion of the exam will usually be able to tell if the gland is under or over active. The images help determing if a nodule is hot or cold, which help determine what the nodule is. The test should be reviewed with thyroid function tests and ultrasound when possible.

Related Questions

Radioactive iodine uptake test - can I still travel afterwards or would I have to hide out for a few days?

No need to hide. Once you are released by your doctor you are no longer a hazard, but you may set off radiation detectors at a port. This could be very difficult in a foreign country. Best to carry a brief letter noting your recent treatment. Read more...
Free to travel. The amount of radioactivity you would take for an uptake test is very tiny....You are free to travel where you want. Read more...

What is the definition or description of: radioactive iodine uptake?

Uptake by thyroid. It is a number to rate how your thyroid gland incorporates iodine relative to a dose to help determine if your thyroid gland is functioning properly, compared to know normal uptakes for the nuclear medicine facility. Read more...

Going in for a radioactive iodine uptake scan. How is this administered?

A pill. As a pill similar in size to a vitamin pill. Read more...
Usually capsule. Usually liquid in capsule and is ingested by patient with liquid drink. Sometimes some patients can not swallow pills and can be administered in these rare cases, if facility is informed in advance, in liquid form. Read more...

Which is a possible contraindication to the use of radioactive iodine? The use of salt substitute, presence of a goiter, or shellfish allergy

Eye disease. For patients with graves' orbitopathy (bulging eye/s), the eyes might get worst with radioactive iodine. This is a relative contraindication as we can treat with steroids to lessen the effects or prevent this from happening. The three scenarios you described above are not contraindications, however. Read more...

? - on armour thyroid...wanted to try getting off & using the glandular thyroids from the health store - BUT I remembered about 22 years ago, they gave me a radioactive iodine pill to swallow - I had a goiter & was sluggish, gained weight - they found nod

Don't take it. on your own way, thyroid hormone exact dose need to be regulated with physician supervision need blood levels , too much or too little will harm you . Before synthetic ( synthroid (thyroxine) ) armour or dedicated thyroid is only source ( pigs thyroid ) Synthetic is more easy to regulate , exact amount could be administered , better absorbed . It is up to you which one you want. Read more...

I had a partial thyroidectomy and the radioactive iodine treatment for the other side due to goiter-nodule with small cancer. Synthroid (thyroxine) reduced-why?

For RAI to Work. The overall treatment is a little confusing as cancer is usually surgically removed, but there are a few reasons to lower your Synthroid (thyroxine). It may be held for a while so your left over thyroid tries to work and will suck up the RAI. The other reason is when the thyroid cells die they will release thyroid hormone. This could temp make you hyperthyroid. Eventually your dose will be adjusted again. Read more...
Reduced synthroid (thyroxine) The thyroidectomy will lower the production of synthroid (thyroxine) and you will need an increase in thyroid medicine. Make sure you see an Endocrinologist to help you through the proper dosing. Wish you well and keep me posted please. Read more...

Radioactive iodine uptake scan, should I go to work after? Am a food service clerk. How long should I stay away from pregnant daughter and toddler.

Only scan and uptake. Hi. If all you had was scan and uptakes, you don't have to stay away from anyone or anything. The isotope used for scan and uptakes is 123-I, and is completely harmless to your thyroid (or anyone else's). If you were treated with 131-I after the scan and uptakes, that isotope is harmful to the thyroid, but doesn't come out of your skin! You can work and be around others. It comes out in your urine. Read more...