Page 12 - SONO 260 Chapter 13 The Male Pelvis
P. 12
SONOGRAPHY OF THE THYROID AND
NECK
• Each adult pair shaped lobe measures approximately 4-6 cm in length, 2-3 cm in width, and 1-2 cm in thickness, with the right lobe typically being the largest.
• The isthmus normally measures between 2 and 6 mm in AP diameter.
• A thyroid volume can be calculated by using the following formula: Length x Width x Height x .52.
• There are several prominent muscles and vascular structures that delineate the margins of the thyroid gland.
• The neck muscles, which appear more hypoechoic than the normal thyroid tissue, are easily seen with sonography.
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