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Three-Week Hypothyroid Regimen

This information describes your three-week hypothyroid regimen.

Your dpctor or nurse will tell you when to stop taking thyroid hormone pills.

Start the low iodine diet ___ days prior to day 1.

Drink at least 8 glasses (8 ounces each) of decaffeinated fluid a day. Beverages include water and drinks in the low iodine diet guidelines.

The first week you will come to the hospital Monday through Thursday. You will have blood work and scans. During the second week you will receive your treatment. During the third week you will have a post-treatment scan. The schedule generally looks like this:

Week 1

Diagnostic Testing

Day 1

(4-6 hours)

Blood work

Diagnostic dose of radioactive iodine

Radiation
measurement

Day 2

(90 minutes)

Blood work

Scan

Radiation
measurement

Day 3

(90 minutes)

Blood work

Scan

Radiation
measurement

Day 4

(90 minutes)

Blood work

Scan

Radiation
measurement

Week 2

Therapy

(May be Monday - Friday)

Treatment dose of radioactive iodine

     

Week 3

Follow-up

Post-treatment scan is done about one week after your treatment. It will be arranged by nuclear medicine before you are sent home.

Other tests that may be needed:

  • Your doctor may ask for a PET scan, which measures the body's use of glucose (a type of sugar). Some tumors use more glucose than normal tissue. This test may give your doctor more information on your condition.
  • Women will have blood drawn before treatment to ensure that they are not pregnant. This is a hospital requirement for treatment.