Question 1

Which line is perpendicular to IR for Skull PA Caldwell

Accepted Answer

OML

Question 2

CR angulation for Skull PA Caldwell

Accepted Answer

15˚ caudal to exit the nasion 
Alternate: 25-30˚ caudal to see sup orbital fissure, foramen rotunda and inferior orbital rim region

Question 3

Where is the petrous pyramids projected when performing Skull PA Caldwell

Accepted Answer

Lower 1/3 of the orbits

Question 4

Which lines do we use to position the pt for Lateral Skull

Accepted Answer

IPL perpendicular to IR
IOML perpendicular to the edge of IR

Question 5

CR for Lat Skull

Accepted Answer

CR perpendicular to a point 2" above the EAM

Question 6

Which structures are demonstrated in profile in a lateral skull

Accepted Answer

Sella Turcica and the clivus

Question 7

Which line is perpendicular to IR for Skull AP Axial (Towne's)

Accepted Answer

OML or IOML perpendicular to IR

Question 8

CR for Skull Towne's

Accepted Answer

OML 30˚ caudad/ IOML 37˚ caudad to a point 2.5" above the glabella (hairline)

Question 9

Which structures are visualized in the shallow of the foramen magnum in a Skull Town's view

Accepted Answer

Sella turcica and clinoids

Question 10

Best view of the skull to visualize the Occipital bone

Accepted Answer

Towne's

Question 11

Which part of the pt's face is touching the IR for Skull PA Caldwell

Accepted Answer

Nose and forehead

Question 12

In order to project the petrous pyramids into the lower third of the orbits when obtaining a PA caldwell projection of the cranium, the central ray should be directed

Accepted Answer

Caudad

Question 13

Situation: a pt comes to rad for a routine study of the cranium. He’s unable to flex his head and neck sufficiently to place the OML perp to the IR for the AP axial projection, what should the tech do?

Accepted Answer

USE THE IOML AND INCREASE CR ANGULATION BY 7 DEG

Question 14

During a parietocanthial (waters) projection, susie is instructed to rest her _______ on the table or upright Bucky

Accepted Answer

chin

Question 15

Which set of the sinuses is projected thru the open mouth on a parietocanthial projection?

Accepted Answer

SPHENOID

Question 16

On a lateral skull the sinuses that are located posterior and below the sella tursica are the:

Accepted Answer

SPHENOID SINUSES

Question 17

The primary reason sinuses should be done erect is to demonstrate

Accepted Answer

Air-fluid levels

Question 18

The pair of bones that form most of the lateral walls of the skull is the

Accepted Answer

Parietal

Question 19

In an erect upper PA caldwell for sinuses which of the following would be angled 15 degrees?

Accepted Answer

OML 15˚ from horizontal

Question 20

The SMV projection requires that the IOML is placed parallel to the IR

Accepted Answer

true

Question 21

To demonstrate the floor of the cranium, what projection/position should be used

Accepted Answer

SMV

Question 22

For the lateral projection of the paranasal sinuses, the IR is centered

Accepted Answer

Midway between the outer canthus and the EAM

Question 23

Which variation of the PA axial projection of the skull has been performed if the petrous ridges are at the level of the supraorbital margin?

Accepted Answer

PA 0˚

Question 24

The crista Galli is part of the ______ bone

Accepted Answer

Ethmoid

Question 25

To properly demonstrate a submentovertex projection, the CR should be placed perpendicular to the ______ line

Accepted Answer

IOML

Question 26

What is the proper angulation of the orbitomeatal line to the IR for a parietocanthaial projection (waters method) for the paranasal sinuses?

Accepted Answer

37˚

Question 27

On a PA skull with no angulation the petrous pyramids are demonstrated in the

Accepted Answer

On the center of the orbits

Question 28

What are routine views for Skull

Accepted Answer

PA Axial Caldwell
PA 0˚
AP Axial Towne's
Lateral

Question 29

What are the routine views for Facial Bones

Accepted Answer

PA Axial Caldwell
Parietoacanthial (Water's)
Lateral

Question 30

Which line do we use to position the pt for Facial Bones (Water's)

Accepted Answer

MML perpendicular to IR
OML forms a 37˚ angle with the IR

Question 31

Which part of the pt's face is touching the IR for Facial Bones (Water's)

Accepted Answer

The Chin

Question 32

CR for Water's Facial Bones

Accepted Answer

CR perpendicular to exit the acanthion

Question 33

CR for Lateral Facial Bones

Accepted Answer

Cr perpendicular to midpoint between the outer canthus and the EAM (zygoma)

Question 34

Routine Views for Paranasal Sinuses

Accepted Answer

PA Caldwell
Water's
Lateral
SMV

Question 35

What's the difference in positioning a Caldwell for Skull and one for Sinuses

Accepted Answer

For skull the OML is perpendicular to the IR and the CR is 15˚ caudad, while for sinuses the OML is 15˚ from horizontal and the CR is perpendicular

Question 36

CR for lateral sinuses

Accepted Answer

CR perpendicular to midpoint the outer canthus and the EAM

Question 37

CR for SMV

Accepted Answer

CR perpendicular to midpoint of mandibular angles (2" inferior to mandibular symphysis)

Question

Question

Question

Stack #3564510

Skull-Facial Bones-Sinuses

Question	Answer
Which line is perpendicular to IR for Skull PA Caldwell	OML
CR angulation for Skull PA Caldwell	15˚ caudal to exit the nasion Alternate: 25-30˚ caudal to see sup orbital fissure, foramen rotunda and inferior orbital rim region
Where is the petrous pyramids projected when performing Skull PA Caldwell	Lower 1/3 of the orbits
Which lines do we use to position the pt for Lateral Skull	IPL perpendicular to IR IOML perpendicular to the edge of IR
CR for Lat Skull	CR perpendicular to a point 2" above the EAM
Which structures are demonstrated in profile in a lateral skull	Sella Turcica and the clivus
Which line is perpendicular to IR for Skull AP Axial (Towne's)	OML or IOML perpendicular to IR
CR for Skull Towne's	OML 30˚ caudad/ IOML 37˚ caudad to a point 2.5" above the glabella (hairline)
Which structures are visualized in the shallow of the foramen magnum in a Skull Town's view	Sella turcica and clinoids
Best view of the skull to visualize the Occipital bone	Towne's
Which part of the pt's face is touching the IR for Skull PA Caldwell	Nose and forehead
In order to project the petrous pyramids into the lower third of the orbits when obtaining a PA caldwell projection of the cranium, the central ray should be directed	Caudad
Situation: a pt comes to rad for a routine study of the cranium. He’s unable to flex his head and neck sufficiently to place the OML perp to the IR for the AP axial projection, what should the tech do?	USE THE IOML AND INCREASE CR ANGULATION BY 7 DEG
During a parietocanthial (waters) projection, susie is instructed to rest her _______ on the table or upright Bucky	chin
Which set of the sinuses is projected thru the open mouth on a parietocanthial projection?	SPHENOID
On a lateral skull the sinuses that are located posterior and below the sella tursica are the:	SPHENOID SINUSES
The primary reason sinuses should be done erect is to demonstrate	Air-fluid levels
The pair of bones that form most of the lateral walls of the skull is the	Parietal
In an erect upper PA caldwell for sinuses which of the following would be angled 15 degrees?	OML 15˚ from horizontal
The SMV projection requires that the IOML is placed parallel to the IR	true
To demonstrate the floor of the cranium, what projection/position should be used	SMV
For the lateral projection of the paranasal sinuses, the IR is centered	Midway between the outer canthus and the EAM
Which variation of the PA axial projection of the skull has been performed if the petrous ridges are at the level of the supraorbital margin?	PA 0˚
The crista Galli is part of the ______ bone	Ethmoid
To properly demonstrate a submentovertex projection, the CR should be placed perpendicular to the ______ line	IOML
What is the proper angulation of the orbitomeatal line to the IR for a parietocanthaial projection (waters method) for the paranasal sinuses?	37˚
On a PA skull with no angulation the petrous pyramids are demonstrated in the	On the center of the orbits
What are routine views for Skull	PA Axial Caldwell PA 0˚ AP Axial Towne's Lateral
What are the routine views for Facial Bones	PA Axial Caldwell Parietoacanthial (Water's) Lateral
Which line do we use to position the pt for Facial Bones (Water's)	MML perpendicular to IR OML forms a 37˚ angle with the IR
Which part of the pt's face is touching the IR for Facial Bones (Water's)	The Chin
CR for Water's Facial Bones	CR perpendicular to exit the acanthion
CR for Lateral Facial Bones	Cr perpendicular to midpoint between the outer canthus and the EAM (zygoma)
Routine Views for Paranasal Sinuses	PA Caldwell Water's Lateral SMV
What's the difference in positioning a Caldwell for Skull and one for Sinuses	For skull the OML is perpendicular to the IR and the CR is 15˚ caudad, while for sinuses the OML is 15˚ from horizontal and the CR is perpendicular
CR for lateral sinuses	CR perpendicular to midpoint the outer canthus and the EAM
CR for SMV	CR perpendicular to midpoint of mandibular angles (2" inferior to mandibular symphysis)

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