A poorly positioned SMV cranial projection (Schueller method) demonstrates the mandibular mentum too far anterior to the ethmoid sinuses. How was the positioning setup mispositioned for such a projection to be obtained?
1. The patient's neck was overextended.
2. The IOML was not aligned parallel with the IR.
3. The central ray was angled too caudally.
4. The patient's head was tilted toward the right side.
a. 1 and 2 only
b. 2 and 4 only
c. 3 and 4 only
d. 1, 2, and 4 only
Question 2
Which of the following is true of an SMV cranial projection (Schueller method) obtained with the vertex of the patient's head tilted toward the right side?
a. The mandibular mentum will be turned toward the right side.
b. The distance from the left mandibular ramus to the lateral cranial cortex is greater than the distance from the right ramus to the lateral cranial cortex.
c. The mandibular mentum is demonstrated anterior to the ethmoid sinuses.
d. The distance from the right mandibular ramus to the lateral cranial cortex is great-er than the distance from the left ramus to the lateral cranial cortex.
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