HEAD CLOVER ASSESSMENT EXAM
QUESTIONS AND CORRECT ANSWERS.
VERIFIED 2025/2026.
What degree and direction of angulation is used for the CR for an AP axial projection, Towne
method, of the skull if the patient is able to depress their chin aligning the OML perpendicular
to the IR? - ANS 30 degrees caudal
Which cranial positioning line should be perpendicular to the IR if the patient is unable to flex
their neck for an AP axial, Towne method, of the skull? - ANS Infraorbitomeatal line (IOML)
When the IOML is adjusted perpendicular to the IR, the CR would need to be angled 37 degrees
caudad.
What is the CR entrance point for a properly positioned AP axial projection, Towne method, of
the skull? - ANS 2.5 inches superior to the glabella
What degree and direction of angulation is used for the CR of a PA axial projection, Caldwell
method, of the skull? - ANS 15 degrees caudad
The petrous pyramids are in the lower third of the orbit during this projection
What is the degree and direction of CR angulation for a PA projection of the skull? - ANS 0
degrees (perpendicular)
Petrous pyramids fill the orbits during this projection
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A patient should be positioned with what two points of their anatomy touching the IR for a PA
projection of the skull? - ANS Forehead and nose
Which cranial positioning line is perpendicular to the IR for a PA projection of the skull? -
ANS Orbitomeatal line (OML)
Which line or plane is perpendicular to the IR when performing a lateral skull radiograph? -
ANS Interpupillary line (IPL)
What is the recommended SID for a lateral skull radiograph? - ANS 40 inches
Which cranial positioning line is parallel to the IR when positioning the patient for a SMV skull
radiograph? - ANS Infraoribitomeatal line (IOML)
The submentovertical (SMV) projection of the skull is best defined by what? - ANS Projection
from below the mandible through the vertex of the skull
What is the recommended patient position for the SMV projection of the skull? -
ANS Standing or sitting at the upright Bucky
What is the recommended SID for a SMV projection of the skull? - ANS 40 inches
For a SMV projection of the skull, the midsagittal plane should be: - ANS Perpendicular to the
IR
For a SMV projection of the skull, the CR should enter directly through which anatomical
structure? - ANS Sella turcica
How far anterior to the external auditory meatus (EAM) does the midsagittal plane pass through
the throat when performing a submentovertex projection of the skull? - ANS .75 inch (2 cm)
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND CORRECT ANSWERS.
VERIFIED 2025/2026.
What degree and direction of angulation is used for the CR for an AP axial projection, Towne
method, of the skull if the patient is able to depress their chin aligning the OML perpendicular
to the IR? - ANS 30 degrees caudal
Which cranial positioning line should be perpendicular to the IR if the patient is unable to flex
their neck for an AP axial, Towne method, of the skull? - ANS Infraorbitomeatal line (IOML)
When the IOML is adjusted perpendicular to the IR, the CR would need to be angled 37 degrees
caudad.
What is the CR entrance point for a properly positioned AP axial projection, Towne method, of
the skull? - ANS 2.5 inches superior to the glabella
What degree and direction of angulation is used for the CR of a PA axial projection, Caldwell
method, of the skull? - ANS 15 degrees caudad
The petrous pyramids are in the lower third of the orbit during this projection
What is the degree and direction of CR angulation for a PA projection of the skull? - ANS 0
degrees (perpendicular)
Petrous pyramids fill the orbits during this projection
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, A patient should be positioned with what two points of their anatomy touching the IR for a PA
projection of the skull? - ANS Forehead and nose
Which cranial positioning line is perpendicular to the IR for a PA projection of the skull? -
ANS Orbitomeatal line (OML)
Which line or plane is perpendicular to the IR when performing a lateral skull radiograph? -
ANS Interpupillary line (IPL)
What is the recommended SID for a lateral skull radiograph? - ANS 40 inches
Which cranial positioning line is parallel to the IR when positioning the patient for a SMV skull
radiograph? - ANS Infraoribitomeatal line (IOML)
The submentovertical (SMV) projection of the skull is best defined by what? - ANS Projection
from below the mandible through the vertex of the skull
What is the recommended patient position for the SMV projection of the skull? -
ANS Standing or sitting at the upright Bucky
What is the recommended SID for a SMV projection of the skull? - ANS 40 inches
For a SMV projection of the skull, the midsagittal plane should be: - ANS Perpendicular to the
IR
For a SMV projection of the skull, the CR should enter directly through which anatomical
structure? - ANS Sella turcica
How far anterior to the external auditory meatus (EAM) does the midsagittal plane pass through
the throat when performing a submentovertex projection of the skull? - ANS .75 inch (2 cm)
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
