Question 1

How many bones make up the cranium?

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  10 
A)  4 
B)  6 
C)  8 
D)  10

Question 2

Which skull type is narrow from side to side?

Accepted Answer

A)  Mesocephalic 
B)  Dolichocephalic 
C)  Brachycephalic 
A)  Mesocephalic 
B)  Dolichocephalic 
C)  Brachycephalic

Question 3

Which of the following is (are) clearly demonstrated on an SMV projection of the cranial base?
1)Mastoid process
2)Sphenoid process
3)Carotid canals

Accepted Answer

A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3 
A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3

Question 4

When using the angled grid technique for the PA axial (Caldwell method) projection of the sinuses, the vertical grid device must be angled _____ degrees.

Accepted Answer

A)  7 
B)  10 
C)  15 
D)  20 
A)  7 
B)  10 
C)  15 
D)  20

Question 5

The bone indicated in the figure below is the:

Accepted Answer

A)  temporal. 
B)  parietal. 
C)  occipital. 
D)  sphenoid. 
A)  temporal. 
B)  parietal. 
C)  occipital. 
D)  sphenoid.

Question 6

Which part of the patient's face is touching the upright bucky, or table, for a parietoacanthial projection (Waters method)?

Accepted Answer

A)  Forehead 
B)  Nose 
C)  Chin 
D)  Nose and chin 
A)  Forehead 
B)  Nose 
C)  Chin 
D)  Nose and chin

Question 7

The zygomatic arches are a part of which bone?

Accepted Answer

A)  Frontal 
B)  Parietal 
C)  Temporal 
D)  Sphenoid 
A)  Frontal 
B)  Parietal 
C)  Temporal 
D)  Sphenoid

Question 8

Which of the following is true regarding the placement of the image receptor for an AP axial (Towne) projection of the skull?
1)Its upper margin is at the level of the top of the cranium.
2)Its upper margin is 2 inches above the top of the cranium.
3)Its upper margin is 2 inches below the top of the cranium.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1, 2, and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1, 2, and 3

Question 9

Which of the following should be seen superimposed on a lateral image of the skull?
1)Orbital roofs
2)External acoustic meati
3)Temporomandibular joints

Accepted Answer

A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3 
A)  1 and 2 
B)  1 and 3 
C)  2 and 3 
D)  1, 2, and 3

Question 10

The letter A in the image below of the paranasal sinuses labels the _____ sinuses.

Accepted Answer

A)  ethmoid 
B)  sphenoid 
C)  maxillary 
D)  frontal 
A)  ethmoid 
B)  sphenoid 
C)  maxillary 
D)  frontal

Question 11

Which of the following is centered to the image receptor for a parietoacanthial projection of the facial bones?

Accepted Answer

A)  Nasion 
B)  Acanthion 
C)  Glabella 
D)  Mental point 
A)  Nasion 
B)  Acanthion 
C)  Glabella 
D)  Mental point

Question 12

At what age are all of the sinuses completely developed?

Accepted Answer

A)  8 
B)  10 
C)  14 
D)  18 
A)  8 
B)  10 
C)  14 
D)  18

Question 13

For the open-mouth modification of the Waters method, the central ray should exit the:

Accepted Answer

A)  nasion. 
B)  glabella. 
C)  acanthion. 
D)  open mouth. 
A)  nasion. 
B)  glabella. 
C)  acanthion. 
D)  open mouth.

Question 14

What is the average central-ray angulation for the PA axial (Haas) projection of the skull?

Accepted Answer

A)  25 degrees caudad 
B)  25 degrees cephalad 
C)  30 degrees caudad 
D)  30 degrees cephalad 
A)  25 degrees caudad 
B)  25 degrees cephalad 
C)  30 degrees caudad 
D)  30 degrees cephalad

Question 15

The petromastoid portion is a part of which bone?

Accepted Answer

A)  Temporal 
B)  Sphenoid 
C)  Occipital 
D)  Ethmoid 
A)  Temporal 
B)  Sphenoid 
C)  Occipital 
D)  Ethmoid

Question 16

What is the projection (method) demonstrated in the image below used to evaluate trauma to the orbit?

Accepted Answer

A)  Parietoacanthial (Waters) 
B)  PA axial (Caldwell) 
C)  AP axial (Towne) 
D)  PA axial (Haas) 
A)  Parietoacanthial (Waters) 
B)  PA axial (Caldwell) 
C)  AP axial (Towne) 
D)  PA axial (Haas)

Question 17

Which of the following foramina will be demonstrated in the orbit on a parietoacanthial (Waters method) radiograph?

Accepted Answer

A)  Ovale 
B)  Jugular 
C)  Spinosum 
D)  Rotundum 
A)  Ovale 
B)  Jugular 
C)  Spinosum 
D)  Rotundum

Question 18

The letter C in the image below of the paranasal sinuses labels the:

Accepted Answer

A)  ethmoid sinuses. 
B)  sphenoid sinuses. 
C)  maxillary sinuses. 
D)  petrous ridge. 
A)  ethmoid sinuses. 
B)  sphenoid sinuses. 
C)  maxillary sinuses. 
D)  petrous ridge.

Question 19

What is the central-ray angulation for the AP axial projection of the zygomatic arches?

Accepted Answer

A)  10 degrees caudad 
B)  15 degrees caudad 
C)  30 degrees caudad 
D)  35 degrees caudad 
A)  10 degrees caudad 
B)  15 degrees caudad 
C)  30 degrees caudad 
D)  35 degrees caudad

Question 20

The landmark identified in the figure below is the:

Accepted Answer

A)  nasion. 
B)  glabella. 
C)  acanthion. 
D)  auricular point. 
A)  nasion. 
B)  glabella. 
C)  acanthion. 
D)  auricular point.

Exam 20: Skull, Facial Bones, and Paranasal Sinuses

How many bones make up the cranium?

Which skull type is narrow from side to side?

Which of the following is (are) clearly demonstrated on an SMV projection of the cranial base? 1)Mastoid process 2)Sphenoid process 3)Carotid canals

When using the angled grid technique for the PA axial (Caldwell method) projection of the sinuses, the vertical grid device must be angled _____ degrees.

The bone indicated in the figure below is the:

Which part of the patient's face is touching the upright bucky, or table, for a parietoacanthial projection (Waters method)?

The zygomatic arches are a part of which bone?

Which of the following should be seen superimposed on a lateral image of the skull? 1)Orbital roofs 2)External acoustic meati 3)Temporomandibular joints

The letter A in the image below of the paranasal sinuses labels the _____ sinuses.

Which of the following is centered to the image receptor for a parietoacanthial projection of the facial bones?

At what age are all of the sinuses completely developed?

For the open-mouth modification of the Waters method, the central ray should exit the:

What is the average central-ray angulation for the PA axial (Haas) projection of the skull?

The petromastoid portion is a part of which bone?

What is the projection (method) demonstrated in the image below used to evaluate trauma to the orbit?

Which of the following foramina will be demonstrated in the orbit on a parietoacanthial (Waters method) radiograph?

The letter C in the image below of the paranasal sinuses labels the:

What is the central-ray angulation for the AP axial projection of the zygomatic arches?

The landmark identified in the figure below is the:

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