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Home›Thyroid Scan 99m TC
Test Detail
Understanding the Test
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Content created by
Written by
Dr. Shreya Gupta
BDS, MDS - Oral and Maxillofacial Pathology
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
Want to know more?
Read our Editorial Policy

Thyroid Scan 99m TC

This test is for
Male, Female
Test Preparation
  1. Depending on the area to be imaged, you may be asked to wear a hospital gown at the time of the scan.
  2. Pregnant women should inform their doctor (and x-ray technician) as the radiations may affect the fetus. If needed, precautions can be taken to lower the radiation exposure to the fetus.

Understanding Thyroid Scan 99m TC

What is Thyroid Scan 99m TC?

It is an imaging technique to visualize thyroid gland by using a radioactive tracer dye Tc-99m pertechnetate. It is a useful radioactive label for thyroid scanning because of low dosage and optimal resolution. This method helps to diagnose thyroid related disorders including hashimotos disease, graves disease, hyperthyroidism, hypothyroidism and inflamation. It is also helpful in identifying goiter, cysts, nodules and dysfunction of the thyroid gland.

Exposure to the radiations is kept minimal.

Occasional cases of reaction to radioactive tracer can be seen.

What is Thyroid Scan 99m TC used for?

  1. • To determine thyroid gland functioning and identify any dysfunction of the gland • To help in the diagnosis of conditions like Hashimoto’s Disease, Grave’s Disease, thyroiditis, hypo or hyperthyroidism, etc. • To identify goiter (enlarged thyroid), cysts, nodules, or other abnormal growths of the thyroid • To assess thyroid nodules when the patient has hyperthyroidism

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