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Procedures: Skull

Terms in this set (19)

When performing a posteroanterior (PA) projection of the skull, which of the following lines or planes should be perpendicular to the image receptor (IR)?
a. Midsagittal plane (MSP) and infraorbitomeatal line (IOML)
b. Midcoronal place and infraorbitomeatal line (IOML)
c. Midsagittal plane and orbitomeatal line (IOML)
d. Midcoronal plane and interpapillary line (IPL)
C
A patient is positioned for an anteroposterior (AP) axial projection of the skull (Towne). The infraorbitomeatal line (IOML) is adjusted to be perpendicular to the image receptor (IR). The central ray should be angled:
a. 0 degrees (perpendicular)
b. 15 degrees caudad
c. 30 degrees caudad
d. 37 degrees caudad
D
What is the appropriate degree and direction of central ray angulation for a posteroanterior (PA) projection of the skull?
a. 0 degrees
b. 15 degrees caudad
c. 30 degrees cephalad
d. 37 degrees caudad
A
The patient is appropriately positioned for an anteroposterior (AP) axial skull projection (Towne). The central ray enters:
a. At the glabella
b. 2.5 inches superior to the galbella
c. at the nasion
d. 2.5 inches superior to the nasion
B
Which projection of the skull best demonstrates the occipital bone?
a. Posteroanterior (PA) skull
b. Posteroanterior (PA) axial skull (Caldwell method)
c. Anteroposterior (AP) axial skull (Towne method)
d. Lateral Skull
C
In which projection of the skull are the petrous ridges completely superimposing the orbits?
a. Posteroanterior (PA) skull
b. Anteroposterior (AP) axial skull (Towne)
c. Parietocanthial skull (Waters)
d. Lateral skull
A
In which of the following projections is the head positioned so that the orbitomeatal line (OML) forms a 37 degree angle with the place of the image receptor (IR)?
a. Anteroposterior (AP) skull
b. Posteroanterior (PA) skull
c. Anteroposterior (AP) axial (Towne method)
d. Parietoacanthial (waters method)
D
What is the central ray exit point for a posteroanterior (PA) skull radiograph, when the frontal bone is of primary interest, done with a horizontal beam?
a. Gladbella
b. Nasion
c. Acanthion
d. Mental point
B
Which of the following skull projection will demonstrate the sella turcica in profile?
a. Posteroanterior (PA)
b. Anteroposterior (AP)
c. Anteroposterior (AP) axial (Towne method)
d. Lateral
D
Which of the following lines or planes should be perpendicular to the image receptor (IR) when performing a lateral skull radiograph?
a. Midsagittal plane (MSP)
b. Orbitomeatal line (OML)
c. Mentomeatal line (MML)
d. Interpupillary line (IPL)
D
When performing a posteroanterior (PA) axial projection of the skull (Caldwell), what is the rationale for using a 15-degrees caudal angulation on the central ray? The petrous portions of the temporal bones are projected:
a. Directly over the orbits
b. Into the lower 1/3 of the orbits
c. Just inferior to the obits
d. Into the lower 1/3 of the maxillary sinuses
B
For the anteroposterior (AP) axial, Towne method, skull radiograph, if the patient is able to depress their chin enough to align the orbitomeatal line (OML) perpendicular to the image receptor (IR), what degree and direction of angulation should be used on the central ray (CR)?
a. 30 degrees caudal
b. 37 degrees caudal
c. 30 degrees cephalad
d. 37 degrees cephalad
A
For the anteroposterior (AP) axial, Towne method, skull radiograph, if the patient is unable to flex their neck, which cranial positioning line should be perpendicular to the image receptor (IR)?
a. Orbitomeatal line (OML)
b. Infraorbitomeatal line (IOML)
c. Acanthiomeatal line (AML)
d. Mentomeatal line (MML)
B
Which plane of the body should be perpendicular to the image receptor (IR) to prevent rotation and/ or tilt of the head during a posteroanterior (PA) axial, Caldwell method, skull radiograph?
a. Coronal plane
b. Transverse plane
c. Midsagittal plane
d. Frontal plane
C
For the posteroanterior (PA) axial, Caldwell method, skull radiograph, what degree and direction of angulation should be used?
a. 15 degrees cephalad
b. 15 degrees caudal
c.25-30 degrees cephalad
d. 25-30 degrees caudal
B
Which cranial positioning line should be aligned perpendicular to the image receptor (IR) for a posteroanterior (PA) skull radiograph?
a. Infraobitomeatal line (IOML)
b. Orbitomeatal line (OML)
c. Acanthiomeatal line (AML)
d. Gladbellomeatal line (GML)
B
Which two parts of the patient should be touching the imaging surface for a posteroanterior (PA) skull radiograph?
a. forehead and nose
b. forehead and cheek
c. Cheek and chin
d. Chin and nose
A
What is the proper centering point of the central ray (CR) for a lateral skull radiograph?
a. 1 inch superior to the external auditory meatus (EAM)
b. 2 inches superior to the external auditory meatus (EAM)
c. 1 inch inferior to the external auditory meatus (EAM)
d. 2 inches inferior to the external auditory meatus (EAM)
B
Which cranial positioning line should be perpendicular to the image receptor (IR) with no tilt of the head to ensure the head is in a true lateral position for a lateral skull radiograph?
a. Orbitomeatal line (OML)
b. infraorbitomeatal line (IOML)
c. Interpupillary line (IPL)
d. Acanthiometal line (AML)
C
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