Refer to the labeled illustration of the landmarks of the cranium below.  The IOML is represented by which numbered structure? Lat 2(1).jpg

In performing the PA or PA axial projection of the mandibular rami, which of the following planes should be perpendicular to the IR?

Which of the following projections requires a central ray angle of 30 degrees cephalad?

Which of the following is/are true in regards to the AP axial projection of the skull? The OML should be perpendicular to the IR The central ray should be angled 15 degrees cephalad for a general survey of the skull The AP projection shows significant magnification of orbits because of the increased OID 

Which of the following accurately describes the PA axial projection of the facial bones? Center the midcoronal plane of the patient’s body to the midline of the grid Midsagittal plane will be perpendicular to the grid The CR should exit the acanthion at an angle of 15 degrees caudad The CR should exit the nasion at an angle of 15 degrees caudad

What projection of the facial bones is demonstrated in the following radiograph? 020114.jpg cropped.jpg

Which line should be placed parallel to the plane of the IR for the SMV projection of the cranial base?

What is the central ray angulation for the axiolateral oblique projection of the TMJ articulations?

Where is the central ray centered for this projection of the zygomatic arches? 021024A with paint.jpg

Which of the following is true regarding positioning for the parietoacanthial projection? The orbitomeatal line forms a 37 degree angle with the plane of the IR The mentomeatal line is nearly perpendicular to the plane of the IR The coronal plane is perpendicular to the plane of the IR