Which of the Following Statements Is Not True About an SMV

Multiple Choice

Which of the following statements is not true about an SMV cranium projection (Schueller method) ?

A) The IOML should be placed parallel to the IR for the projection.
B) Positioning the midsagittal plane perpendicular to the IR prevents cranial tilting.
C) The dens is centered within the exposure field.
D) If the resulting image demonstrates the mandibular mentum posterior to the ethmoid sinuses, the central ray can be angled caudally to obtain an optimal projection.