Both true and false vocal cords can be shown by high-frequency sonography, which can quantitatively measure both true and false vocal cords with good reliability and reproducibility.

The left lateral approach is essential to sonography of the cervical esophagus. However, the right wall of the esophagus is best seen from the right. In transverse scans, the cervical esophagus wall usually appears to be composed of 5 layers, although 7 layers can also appear, especially as the transducer frequency is increased.

No abstract