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

Question

Quizplus · Accepted Answer

All statements are correct for the Waters method: the patient is upright for air-fluid levels, MML is perpendicular to the IR, the central ray is centered to the acanthion, and OML is at a 37-degree angle with the central ray.

For a Parietoacanthial Sinus Projection (Waters Method), the