Thyroid Screening (Thyroid Ultrasound)

Procedure Overview

Thyroid Screening (Thyroid Ultrasound) at Gangnam Heartscan Healthcare Center uses high-frequency linear-array ultrasonography to visualize the thyroid gland, adjacent parathyroid structures, and cervical lymph nodes in fine anatomical detail. This non-invasive, radiation-free examination detects millimeter-scale thyroid nodules, cysts, calcifications, and parenchymal echogenicity changes associated with thyroiditis.

Clinical Indications

• Early detection and sonographic risk characterization of thyroid cancer and thyroid nodules
• Evaluation of diffuse parenchymal thyroid disease, including autoimmune thyroiditis (Hashimoto's or Graves' disease)
• Investigation of palpable neck masses, anterior neck fullness, hoarseness, or swallowing discomfort
• Ultrasound follow-up of previously detected thyroid nodules or abnormal thyroid function blood tests (TSH, Free T4)

How the Screening Works

1. Supine Neck Positioning: The patient lies comfortably on the examination table with a support pillow placed beneath the shoulders to gently extend the neck.
2. High-Frequency Ultrasound Scanning: A gel-coated linear transducer scans both thyroid lobes, the isthmus, and regional cervical lymph node chains in transverse and longitudinal planes.
3. Specialist Radiologic Reading: A board-certified specialist evaluates nodule size, composition, echogenicity, margins, and vascularity to determine whether routine surveillance or fine-needle aspiration correlation is warranted.

Preparation & Precautions

• No fasting or dietary restriction is required for a standalone Thyroid Ultrasound examination.
• Wear an open-necked or collarless top and remove necklaces or neck accessories prior to the scan.
• Bring any prior thyroid ultrasound images or thyroid hormone laboratory results to support longitudinal comparison.