Which two must occur to successfully demonstrate the ethmoidal and sphenoidal sinuses on the SMV projection? (Select all that apply.)
A) Central ray aligned horizontal and enters perpendicular to IOML.
B) Patient must be recumbent.
C) IOML aligned parallel with the image receptor.
D) OML aligned parallel with the image receptor.

Question

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The Answer of Which two must occur to successfully demonstrate the ethmoidal and sphenoidal sinuses on the SMV projection? (Select all that apply.)
A) Central ray aligned horizontal and enters perpendicular to IOML.
B) Patient must be recumbent.
C) IOML aligned parallel with the image receptor.
D) OML aligned parallel with the image receptor.

Which Two Must Occur to Successfully Demonstrate the Ethmoidal and Sphenoidal