Test 3 Flashcards
How much difference is there between the OML and IOML positioning lines?
7° to 8°
Which two bones form the bony nasal septum?
Ethmoid and vomer
Which cranial bone possesses the zygomatic process?
temporal
A radiograph of a lateral projection of the cranium reveals that the orbital roofs (plates) are not superimposed—one is slightly superior to the other. Which of the following positioning errors led to this radiographic outcome?
tilt
Which cranial bone contains the foramen ovale?
sphenoid
An average-shaped skull with a 47° angle between the petrous pyramids and the midsagittal plane is classified as:
mesocephalic
The slight depression above each eyebrow is termed the:
supraorbital groove.
What is the name of the joint found between the lateral condylar processes of the skull and the atlas of C1?
Atlanto-occipital joint
A radiograph of a posteroanterior (PA) axial projection (Caldwell method) of the cranium reveals that the petrous ridges are located at the level of the lower one-third of the orbits. The technologist performed this projection with the CR angled 15° caudad to the orbitomeatal line (OML). How must positioning be altered if a repeat exposure is performed?
None of the above; positioning was correct.
Which of the following sutures separates the parietal from the occipital bone?
Lambdoidal
T or F: The sensory apparatus of both equilibrium and hearing are contained in the internal ear.
True
The pituitary gland (hypophysis cerebri) is associated with and protected by the ____ bone.
sphenoid
A patient enters the emergency department (ED) with a possible basilar skull fracture. Which of the following skull projections would best demonstrate any blood present in the sphenoid sinus?
Horizontal beam lateral projection
Which cranial bone possesses the sella turcica?
Sphenoid
Which one of the following positioning errors most often results in a repeat exposure of a cranial position?
Incorrect rotation and tilt
Where is the CR centered for a lateral projection of the cranium?
Two inches (5 cm) superior to EAM
Which of the following terms describes the anterior fontanel found in the adult skull?
bregma
Which of the following terms describes the small irregular bones occasionally found in the sutures?
Wormian
Which positioning line should be perpendicular to the plane of the IR for the AP axial (Towne) projection with a 37° caudad CR angle?
IOML
Which term describes the small flap of cartilage covering the opening to the ear?
Tragus
There are a total of ____ fontanels in an infant.
six
Which of the following landmarks corresponds with the level of the petrous ridge?
Top of ear attachment (TEA)
Which sinus often produces an air/fluid level indicating a basilar skull fracture?
Sphenoid
Which of the following structures are described as scroll-like projections found in the nasal cavity?
Conchae
The left mastoid fontanel becomes the ____ in an adult.
left asterion
T or F: The PA axial projection (Haas method) for the cranium requires a CR angle of 25° caudad.
false
