Thyroid Technetium Scan in Chennai
What is this study?
A Thyroid Technetium Scan, also known as Technetium Thyroid Scan or Thyroid Uptake Scan, is a nuclear medicine imaging procedure used to evaluate the structure and function of the thyroid gland. It involves the administration of a radioactive tracer, usually technetium-99m (Tc-99m) pertechnetate, which is taken up by the thyroid gland, allowing visualization of thyroid morphology and function.
What is the need for the study?
The Thyroid Technetium Scan is performed to:
- Assess thyroid function and detect abnormalities such as thyroid nodules, goiter, thyroiditis, or hyperthyroidism.
- Differentiate between benign and malignant thyroid nodules by evaluating their uptake of the radioactive tracer.
- Monitor the response to treatment in patients with thyroid disorders, such as radioactive iodine therapy for hyperthyroidism or thyroid cancer.
This study helps healthcare providers make accurate diagnoses, guide treatment decisions, and monitor the effectiveness of interventions aimed at managing thyroid disorders.
How do I prepare?
Preparation for a Thyroid Technetium Scan may include:
- Medication: Inform your healthcare provider about any medications you are taking, as certain medications, such as thyroid hormones or antithyroid drugs, may need to be temporarily stopped before the scan.
- Fasting: You may be instructed to fast for a period before the scan, typically for several hours, to ensure an empty stomach for accurate imaging.
- Iodine Restriction: Avoid consuming foods or medications containing iodine before the scan, as iodine can interfere with the uptake of the radioactive tracer by the thyroid gland.
Your healthcare provider will provide specific instructions on how to prepare for the Thyroid Technetium Scan based on your individual circumstances.
How is this scan performed?
During a Thyroid Technetium Scan:
- Radiotracer Administration: A small amount of technetium-99m (Tc-99m) pertechnetate is administered orally or intravenously, depending on the specific protocol used.
- Uptake Period: The radioactive tracer is allowed to accumulate in the thyroid gland over a period of time, typically 15-60 minutes.
- Imaging: A gamma camera is used to acquire images of the thyroid gland from various angles. The camera detects the gamma rays emitted by the radioactive tracer, allowing visualization of thyroid morphology and function.
- Functional Assessment: The images obtained from the scan are analyzed to assess thyroid uptake and distribution of the radioactive tracer, as well as to detect any abnormalities or lesions within the thyroid gland.
What should I do after the scan?
After the Thyroid Technetium Scan:
- Resume Normal Activities: You can usually resume your normal activities immediately after the scan.
- Follow-Up: Attend any scheduled follow-up appointments with your healthcare provider to review the results of the scan and discuss further management, if necessary.
Are there any risks in the study?
Thyroid Technetium Scans are generally considered safe and non-invasive. The amount of radiation exposure from the radioactive tracer used in the scan is minimal and poses little risk to most patients. However, as with any medical procedure involving radiation, there is a small risk of allergic reactions or adverse effects.
Your healthcare provider will discuss the potential risks and benefits of the Thyroid Technetium Scan with you and address any concerns you may have before proceeding with the procedure.
It’s essential to follow all instructions provided by your healthcare provider and communicate any symptoms or concerns you experience during or after the Thyroid Technetium Scan. Your healthcare team is here to support you throughout the process and ensure the best possible outcomes for your thyroid health.
