An SMV cranial projection (Schueller method) with accurate positioning demonstrates
1)the nasal fossae just anterior to the ethmoid sinuses.
2)the mandibular mentum slightly posterior to the ethmoid sinuses.
3)an equal distance from the mandibular ramus to the lateral cranial cortex on both sides.
4)the bony nasal septum aligned with the long axis of the exposure field.
A) 2 and 3 only
B) 1 and 3 only
C) 1, 3 and 4 only
D) 1, 2, 3, and 4

Question

Quizplus · Accepted Answer

The SMV cranial projection (Schueller method) is used to visualize the base of the skull and the facial bones. Accurate positioning in this projection demonstrates the following:

1) The nasal fossae just anterior to the ethmoid sinuses (to visualize the nasal bones and septum).
2) The mandibular mentum slightly posterior to the ethmoid sinuses (to visualize the lower jaw and the hyoid bone).
3) An equal distance from the mandibular ramus to the lateral cranial cortex on both sides (to ensure proper alignment and symmetry).
4) The bony nasal septum aligned with the long axis of the exposure field (to minimize distortion and ensure proper visualization of the nasal bones).

Therefore, choice C (1, 3 and 4 only) is the best answer as it correctly identifies the structures that can be visualized and their accurate positioning in the SMV cranial projection (Schueller method).

An SMV Cranial Projection (Schueller Method) with Accurate Positioning Demonstrates