Abstract
A sonographic study of the oral cavity and oropharynx conducted using three types of a transducers. Transducer (A) is a small finger type, transducer (B) is a bar hole type and transducer (C) is linear array type. An intraoral ultrasonic scan using transducer (A) was found to be effective for evaluating neoplasmas of the tongue. Transducer (B) was useful for evaluating tumors of the softpalate and palatine tonsil. Transcutaneous ultrasonography by transducer (C) was found to be valuable in assessing the base of the tongue. Therefore, ultrasonography is considered to be a valuable non-invasive method for delineating tumors in the oral cavity and oropharynx.
