For a submentovertex (SMV) cranial projection (Schueller method), the
1)central ray is aligned perpendicular to the IR.
2)central ray is centered to the midsagittal plane at a level 0.75 inch (2 cm) anterior to the level of the EAM.
3)IOML is parallel with the IR.
4)midsagittal plane is perpendicular to the IR.
A) 1 and 2 only
B) 3 and 4 only
C) 1, 3, and 4 only
D) 1, 2, 3, and 4

Question

Quizplus · Accepted Answer

In a submentovertex (SMV) cranial projection (Schueller method), the central ray is indeed aligned perpendicular to the image receptor (IR) and centered to the midsagittal plane at a level 0.75 inch (2 cm) anterior to the level of the External Auditory Meatus (EAM). Additionally, the Infraorbitomeatal Line (IOML) is aligned parallel with the IR, and the midsagittal plane is perpendicular to the IR. These positioning criteria ensure proper visualization of the desired anatomical structures in the SMV projection.

For a Submentovertex (SMV) Cranial Projection (Schueller Method), the