Why is I-123 better than I-131?

Why is I-123 better than I-131?

The gamma emission of 123I allows excellent imaging (≈80% efficiency for a -inch-thick crystal) with low background activity. It provides considerably lower doses of radiation to the thyroid with comparable activity than does 131I. Iodine-123 is the iodide of choice for thyroid imaging.

Can we do I-123 I-131 scan after total thyroidectomy?

for diagnostic purposes before therapy with I-131, and several studies indicate that I-123 is comparable to high-dose I- 131 post-treatment imaging in the detection of thyroid remnants after thyroidectomy (22,23,26).

What is the difference between radioactive iodine and regular iodine?

The thyroid gland cannot tell the difference between stable and radioactive iodine. It will absorb both. KI (potassium iodide) blocks radioactive iodine from entering the thyroid. When a person takes KI, the stable iodine in the medicine gets absorbed by the thyroid.

What is iodine 123 used for in medicine?

Sodium Iodide I-123 is a radioactive isotope of iodine used in nuclear medicine for the diagnostic study of thyroid disease. Following oral administration, I-123 is absorbed through the gastrointestinal tract and is taken up by the thyroid gland.

What are the side effects of iodine 123?

Common side effects may include:

• pain, swelling, burning, or irritation around the IV needle;
• headache;
• dizziness, spinning sensation;
• dry mouth; or.
• nausea.

Is Rai really necessary after thyroidectomy?

Today, only approximately 20% of all papillary thyroid cancer patients undergo post-0perative RAI treatment. RAI treatment is primarily beneficial only when the patient has undergone a total thyroidectomy (complete removal of the thyroid gland) in the surgery for their papillary thyroid cancer.

Is radioactive iodine necessary?

Radioactive iodine therapy has been used since the 1950s. The risk is low, and the benefits are important for a good recovery. RAI is a very common and accepted treatment for thyroid cancer patients following thyroid surgery.

How is iodine-131 used in diagnosis and treatment of thyroid disease?

When a small dose of I-131 is swallowed, it is absorbed into the bloodstream in the gastrointestinal (GI) tract. It is concentrated from the blood by the thyroid gland, where it begins destroying the gland’s cells. Doctors also use radioactive iodine I-131 to treat thyroid cancer.

What is radioactive iodine-131 used for medically?

I-131 is used in medicine to diagnose and treat cancers of the thyroid gland.

Is Iodine-123 toxic?

Toxicity. Large doses of Iodine-123 maybe toxic to the thyroid gland and surrounding tissues. Iodine-123 may cause hypothyroidism and other thyroid disfunctions, including thyroid cancers.