For a lateral cranial projection, the
1. midsagittal plane is positioned parallel with the IR.
2. IPL is positioned parallel with the IR.
3. IOML is perpendicular to the front edge of the IR.
4. central ray is centered 2 inches (5 cm) anterior to the EAM.
a. 1 and 3 only
b. 1 and 4 only
c. 2 and 3 only
d. 1, 3, and 4 only
Question 2
Which of the following pertains to an AP axial (Towne method) cranial projection obtained with the patient's face rotated toward the left side?
a. The dorsum sellae is demonstrated superior to the foramen magnum.
b. The atlas's posterior arch is demonstrated within the foramen magnum.
c. The distance from the dorsum sellae to the lateral foramen magnum on the pa-tient's left side is narrower than on the right side.
d. The distance from the dorsum sellae to the lateral foramen magnum on the pa-tient's right side is narrower than on the left side.
