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6 years ago
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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6 years ago
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6 years ago
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