For a Parietoacanthial Sinus Projection (Waters Method), the

question 36

Multiple Choice

For a parietoacanthial sinus projection (Waters method) , the
1) patient is positioned upright to demonstrate air-fluid levels within the maxillary sinuses.
2) MML is aligned perpendicular to the IR.
3) central ray is centered to the acanthion.
4) OML is at a 37-degree angle with the central ray.

• A) 1 and 4 only
• B) 2 and 3 only
• C) 1, 2, and 3 only
• D) 1, 2, 3, and 4

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