Facial, Paranasal sinuses, Orbits and Nasal

Question 1

Facial bones OF20

Answer 1

Position:

• Distance from lateral orbital margin and crista galli to lateral cranial cortices are equal
• Petrous ridges are horizontally below inferior orbital margins

Area:
-Frontal and ethmoid sinuses and lateral cranial cortices

Exposure:
Frontal bone visualized

Question 2

Facial bones OM

Answer 2

Position:

• Distance from lateral orbital margins and bony nasal septum to lateral cranial cortices are equal
• Petrous ridges are inferior to maxillary sinuses and extend laterally from posterior maxillary alveolar processes

Area:
-Front and maxillary sinuses, lateral cranial cortices and inferior orbital rims

Exposure:
-Maxillary region

Question 3

Facial bones Lateral

Answer 3

Position:

• Sella turcica shown
• Orbital roofs, mandibular rami, greater wings of sphenoid, external acoustic canals, zygomatic bones and cranial cortices are superimposed

Area:
-Frontal, ethmoid, sphenoid, maxillary sinuses, greater wings of sphenoid, orbital roofs, sella turcica, zygoma and mandible

Exposure
-Maxillary region

Question 4

Paranasal sinuses OF15

Answer 4

Position:

• Distance from lateral orbital margin and crista galli to lateral cranial cortices are equal
• Petrous ridges projected into lower 1/3 orbits
• Petrous ridges are above frontonasal suture
• Anterior ethmoid air cells are laterally adjacent to each nasal bones

Area:
-Frontal, ethmoid, and maxillary sinuses and lateral orbital margins

Question 5

Paranasal sinuses OM

Answer 5

Position:

• Distance from lateral orbital margins and bony nasal septum to lateral cranial cortices are equal
• Petrous ridges are inferior to maxillary sinuses
• Inferior maxillary sinuses are not superimposed by alveolar processes

Area:
-Frontal and maxillary sinuses and lateral orbital rims

Question 6

Paranasal sinuses Lateral

Answer 6

Position:

• Sella turcica shown
• Orbital roofs, external acoustic canals and cranial cortices are shown

Area:
-Frontal, ethmoid, sphenoid, maxillary sinuses, greater wings of sphenoid, orbital roofs, sella turcica, zygoma and mandible

Question 7

Orbits OF20

Answer 7

Position:

• Distance from lateral orbital margins and crista galli to lateral cranial cortices are equal
• Petrous are horizontally below inferior orbital margin

Area:
-Frontal and ethmoid sinuses and lateral cranial cortices

Question 8

Orbits OM

Answer 8

Position:

• Distance from lateral orbital margins and bony nasal septum to lateral cranial cortices are equal
• Petrous ridges are inferior to maxillary sinuses

Area:
-Frontal and maxillary sinuses and lateral orbital rim

Question 9

Orbits OM55

Answer 9

Position:

• Cranium not rotated
• Petrous ridges are projected into lower maxillary sinuses, below inferior orbital rim

Area:
-Lower orbital rim in center, orbital rim and maxillary bones

Exposure:
-Orbital floor visualized

Question 10

Orbits Lateral

Answer 10

Position:

• Sella turcica shown
• Orbital roofs, greater wings of sphenoid and cranial cortices are equal

Area:
-Frontal, ethmoid, sphenoid, maxillary sinuses, greater wings of sphenoid, orbital roofs and sella turcica

Question 11

Nasal bones Lateral

Answer 11

Position:
-Orbital and most anterior cranial cortices are superimposed

Area:
-Nasal bone with soft tissues, anterior nasal spine of maxilla, frontonasal suture, most anterior cranial cortices, orbital roofs, and zygomatic bones

Question 12

Nasal bones OM

Answer 12

Position:

• Lateral orbital margin to bony nasal septum are equal
• Petrous ridges are inferior to maxillary sinuses

Area:
-Nasal septum, anterior nasal spine and lateral orbits