Not for emergencies. Rapidly enlarging neck mass, difficulty breathing or swallowing, or symptoms of airway compromise require emergency evaluation. Call 911 or go to the ER. DOD is not for emergencies.
Thyroid Ultrasound: What Patients Should Know
A thyroid ultrasound uses high-frequency sound waves to create detailed images of the thyroid gland — including its size, structure, and any nodules present. It does not use radiation and is the primary imaging modality for thyroid evaluation.
Educational content only. Thyroid nodule management and follow-up should be directed by a licensed provider or endocrinologist. DOD does not perform or interpret thyroid ultrasound.
Quick Answer
Thyroid ultrasound uses high-frequency sound waves to image the thyroid gland — its size, echogenicity (texture), vascularity, and any nodules present. No ionizing radiation is involved. Thyroid ultrasound is the primary imaging modality for thyroid nodule characterization. Radiologists use systems like ACR TI-RADS to describe nodule features and guide management recommendations. Provider orders are required at most facilities. DOD can review thyroid ultrasound order requests for eligible patients in supported states.
What Thyroid Ultrasound Images
Thyroid Gland Overall
Volume, dimensions, echogenicity, heterogeneity
Thyroid Nodules
Size, composition (solid/cystic/mixed), echogenicity, margins, shape, calcifications
Adjacent Lymph Nodes
Central and lateral neck compartments — size, architecture, vascularity
Vascularity (Doppler)
Blood flow within the gland and nodules
Parathyroid Glands
May be incidentally identified if enlarged
Surrounding Neck Structures
Adjacent muscles, trachea, major vessels
Frequently Asked Questions
Sources
- Thyroid Ultrasound — Patient Information — RadiologyInfo.org (ACR / RSNA)
- ACR TI-RADS — American College of Radiology (ACR)
- Thyroid Tests — MedlinePlus (NIH)
Related Education and Order Pages
Need a Provider Review for a Thyroid Ultrasound?
$40 virtual provider review. Orders issued only when medically appropriate.
Start Virtual Consult — $40Not for emergencies. Orders not guaranteed.
Educational content only. DOD does not perform or interpret thyroid ultrasound. Thyroid nodule management should be directed by a licensed endocrinologist or provider.