ABSTRACT
US Technique Sonography of the neck is performed with the patient supine and the neck in hyperextension (2). A towel or pad under the shoulders may aid in exposure of the anterior neck. High-frequency (7-15 MHz) linear transducers provide optimal spatial resolution and visualization in most patients. In obese patients with thick necks, the use of a 5 MHz transducer may be necessary to obtain adequate depth penetration. Rarely, a low-frequency (4-5 MHz) sector transducer may be necessary to fully evaluate glands that extend into a retrosternal location.
