6.
The proper patient and part position for a PA sinus (Caldwell method) is:
a. Patient erect; midsagittal plane perpendicular to the midline of film; OML
perpendicular to the film.
b. Patient erect; midsagittal plane perpendicular to the midline of the film; IOML
perpendicular to the film.
c.
Patient erect, head in true lateral position; midsagittal plane parallel to film;
IPPL perpendicular to film; IOML perpendicular to front edge of cassette.
d. Patient erect; chin against table or upright Bucky, MML perpendicular to film;
OML at a 37 degree angle; midsagittal plane perpendicular to film.
7.
For a parietoacanthial projection (Waters), the angle of the OML is:
a. 15 degrees.
b. 25 degrees.
c.
30 degrees.
d. 37 degrees.
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