Paranasal Sinuses - Radiography

Question 1

Which structures should always be radiographed with the patient in an upright position?

Answer 1

Paranasal sinuses

Question 2

Which of the following is the only projection for paranasal sinuses that adequetely demonstrates all four sinus groups?

Answer 2

Lateral

Question 3

With reference to the outer canthus, where should the central ray be directed for the lateral projection of the sinus?

Answer 3

Pasterior

Question 4

Which sinus group is of primary importance in the lateral projection of the sinuses?

Answer 4

Sphenoidal

Question 5

Which sinus groups are best demonstrated wiht the PA axial projection, Caldwell method?

Answer 5

Frontal and anterior ethmoidal [sinuses]

Question 6

For the PA axial projection, Caldwell method,of the sinuses, which positioning line, in addition to the midsagittal plane, should be perpendicular to the IR?

Answer 6

Orbitomeatal

Question 7

Where should petrous ridges be seen in the image of the PA axial projection, Caldwell method, of the sinuses?

Answer 7

Lower third of the orbits

Question 8

Which positiioning line should form an angle of 37 degrees with the IR for the parietoacanthial projection, Waters method?

Answer 8

Orbitomeatal

Question 9

With reference to the IR, how should the central ray be directed for the parietoacanthial projection, Waters method?

Answer 9

Perpendicular

Question 10

Which paranasal sinus group is best demonstrated with the parietoacanthial projection, Waters method?

Answer 10

Maxillary

Question 11

Where should the petrous ridges be seen in the image of the parietoacanthial projection, Waters method, of the paranasal sinuses?

Answer 11

Below the maxillary sinuses

Question 12

Where should the central ray exit the head for the parietoacanthial projection, Waters method?

Answer 12

Acanthion

Question 13

Which sinus group is not well demonstrated in the image produced by the parietoacanthial projection Waters method?

Answer 13

Sphenoidal

Question 14

Which two paranasal sinus groups are better demonstated with the SMV projection than are the other sinuses?

Answer 14

Ethmoidal and sphenoidal

Question 15

Which projection of the sinuses demonstrates a symmetric image of the anterior portion of the base of the skull?

Answer 15

SMV

Question 16

In which projection of the sinuses is the IR centered to the nasion?

Answer 16

PA axial, Caldwell method

Question 17

In which projection of the sinuses is the mentomeatal line approximately perpendicular to the plane of the IR?

Answer 17

Parietoacanthial, Waters method

Question 18

In which projection of the sinuses must the OML form an angle of 15 degrees with plane of the IR?

Answer 18

PA axial, Coldwell method

Question 19

Which evaluation criterion pertains to the lateral projection of the paranasal sinuses?

Answer 19

All four sinus groups should be included

Question 20

Which evaluation criterion pertains to the lateral projection of the paranasal sinuses?

Answer 20

The orbital roofs should be superimposed.

Question 21

Which evaluation criterion pertains to the PA axial projection, Coldwell method, of the sinuses?

Answer 21

The frontal and ethmoidal sinuses should be seen

Question 22

Which evaluation criterion pertains to the PA axial projection, Coldwell method, for sinuses?

Answer 22

Petrous ridges should lie in the lower third of the orbits.

Question 23

Which evaluation criterion pertains to the parietoacanthial projection, Waters method, for paranasal sinuses?

Answer 23

Petrous ridges should lie immediately below the floor of the maxillary sinuses

Question 24

Which evaluation criterion pertains to the SMV projection for paranasal sinuses?

Answer 24

Mental protuberance should superimpose anterior frontal bone

Question 25

Which evaluation criterion pertains to the SMV projection for sinuses?

Answer 25

Mandibular condyles should be anterior to the petrous ridges