What does a normal thyroid uptake scan mean?
Radioactive thyroid scan and radioactive iodine uptake test (RAIU) Normal: The amount of radioactive tracer in the thyroid gland is normal. An RAIU test measures the amount of tracer taken up by the thyroid gland at certain times after the tracer is given.
What is 24 hour thyroid uptake?
Normal 24 hour uptake values have a range of 10-30%. Hypothyroidism is considered any percentage less than 10; whereas uptake values greater than 30 indicate hyperthyroidism.
What is an I 131 uptake test?
Alternative Names: Iodine uptake test; RAIU. How the test is performed: RAIU is a type of nuclear test that measures how much radioactive iodine is taken up by the thyroid gland in a given time period. You are asked to ingest (swallow) radioactive iodine (I-123 or I-131) in liquid or capsule form.
What is a normal thyroid ultrasound?
The limits of normal thyroid volume are 10 to 15 mL for adult females and 12 to 18 mL for males.
What can thyroid scans detect?
A thyroid scan is a nuclear medicine examination that uses the emissions of gamma rays from radioactive iodine to help determine whether a patient has thyroid problems, including hyperthyroidism, cancer, or other growths.
What is the difference between i-123 and i 131?
Iodine, in the form of iodide, is made into two radioactive isotopes that are commonly used in patients with thyroid diseases: I-123 (harmless to thyroid cells) and I-131 (destroys thyroid cells. RAI is safe to use in individuals who have had allergic reactions to seafood or X-ray contrast agents.
What is I 123 uptake and scan?
What is I-123 Uptake and Scan? An I-123 Uptake and Scan is a trace amount of radioactive iodine that is used to evaluate the thyroid gland for in physiological abnormalities. Patient Prep: Prior to the procedure the patient has to be off of all thyroid medication for. a minimum of 2 weeks.
Can you drink water before a thyroid uptake scan?
When you arrive at Imaging Services, you will swallow a capsule that contains a tracer. You must fast for 2 more hours after swallowing this capsule. You may drink water. You may eat after this 2-hour fasting period, before you return for your uptake study.
What is normal thyroid level?
The normal range of TSH levels in adults is between 0.4 to 4.0 mIU/L (milli-international units per liter). Some research suggests that this range should actually be more like 0.45 to 2.5 mIU/L. The TSH range may also vary slightly based on the testing facility where your blood is being analyzed.