Semiautomated Thyroid Volumetry Using 3D CT: Prospective Comparison With Measurements Obtained Using 2D Ultrasound, 2D CT, and Water Displacement Method of Specimen

Thyroid volumes measured using 2D ultrasound or semiautomated 3D CT are substantially close to thyroid specimen volumes measured using the water displacement method. Semiautomated 3D CT thyroid volumetry can provide a more reliable measure of thyroid volume than 2D ultrasound.