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

Quizplus · Accepted Answer

The mandibular mentum appearing too far anterior to the ethmoid sinuses in an SMV projection indicates that the patient's neck was overextended and the infraorbitomeatal line (IOML) was not aligned parallel with the image receptor (IR), leading to incorrect positioning.

A Poorly Positioned SMV Cranial Projection (Schueller Method) Demonstrates the Mandibular