WATERS PROJECTION ( FIG. ) Step 1 Evaluate the calvarium and sutures, starting in the left temporal area over the supraorbital ridges to the right temporal area. Look for intracranial calcifi cations. In this and all subsequent steps, compare the right and left sides and look for symmetry. Step 2 Evaluate the orbits and the frontal sinuses. Identify the supraorbital and infraorbital rim, the inferior orbital foramen, the fl oor of the orbit, the zygomaticofrontal sutures, and the innominate line of the infratemporal fossa crossing on the lateral aspect of each orbit. Step 3 Evaluate the maxillary sinuses and nasal cavity. Identify the superior, medial, and lateral walls and the fl oor of the maxillary sinuses; the nasal septum; and the fl oor and lateral walls of the nasal cavity. Try to identify the foramen rotundum projected toward the mesial wall of the sinus. Step 4 Evaluate the zygomatic arches. Identify the frontal, maxillary, and temporal processes of the zygoma and the zygomaticofrontal suture. Confi rm continuity of outlines and symmetry with the contralateral side. Step 5 Evaluate the condylar and coronoid processes of the mandible. This is one of the best PA views of the coronoid process.
Posted on: Sat, 11 Oct 2014 12:52:54 +0000
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