|Waters view of the sinuses|
A waters view is an AP view in which the patient flexes the neck and elevates the chin so that the x-ray beam passes obliquely through the facial structures, directed from caudal to cranial. In effect, this places the orbits and maxillary sinuses above the skull base structures and petrous ridge of the temporal bone, enabling them to be visualized better than on an AP view. This patient's frontal sinuses are very small (hypoplastic).
Identify the following: