I131 Wholebody Thyroid Metastases Study

Indications

• Evaluation for functioning thyroid cancer, either recurrent in the thyroid bed or metastases.

Examination Time

• Initially: 30 minutes for radiopharmaceutical administration
• Imaging @ 48 hours: 1 to 1.5 hours for whole body scan

Patient Preparation

• Patient must be off thyroid hormones
  • Thyroxin ( T-4) for at least 4 weeks
  • Triiodothyronine ( T-3) for at least 10 days
  • Synthroid for at least 6 weeks
• Patient must not have had intravenous or intrathecal iodinated contrast material (IVP, CT, Myelogram, and Angiogram for at least 3 weeks
• Patient should be NPO for 4 hrs prior to administration and 1 hour afterwardsRadiopharmaceutical

Radiopharmaceutical

• I-131 as sodium iodide (capsule only)
• 5.0 mCi
• Oral Administration

Patient Position

• Patient supine
• Whole body (may exclude below the knees)