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Flashcards in test 4 skull positioning Deck (53)
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0

How can you tell this is a PA skull?

Petrous ridges fill orbits

1

PA SKULL: OML is ______ to IR.

Perpendicular

2

PA SKULL: MSP is _______ to IR

Perpendicular

3

In a PA skull what is touching the IR

Forehead and nose

4

Where does the cr enter or exit on a PA skull?

Exits nasion

5

Do you angle on a PA skull?

No angle

6

What structures do you see on the PA skull?

⚫️petrous ridges fill orbits
⚫️cristi galli
⚫️frontal bone
⚫️frontal sinuses

7

How can you tell this is a PA axial skull?

Petrous ridges in lower third of orbits

8

In a PA axial skull: OML is ______ to IR

Perpendicular

9

In PA axial skull: MSP is _______ to IR

Perpendicular

10

In a PA axial skull what is touching the IR?

Forehead and nose

11

In a PA axial skull where the CR enter or exit?

Exits nasion

12

Do you angle the CR on a PA axial skull, how much and what direction?

15 degree caudal

13

What structures do you see on a PA axial skull?

⚫️petrous ridges in bottom 1/3 of orbits
⚫️cristi galli
⚫️frontal bone
⚫️frontal sinuses

14

AP AXIAL SKULL(Townes method) : OML IS _____ To IR.

Or

IOML is ______ to IR

Perpendicular
Perpendicular

15

AP AXIAL SKULL (TOWNES METHOD): MSP is ________ to IR.

Perpendicular

16

on an AP Axial Skull (Townes) what is touching the IR?

Back of head

17

On an AP Axial skull/Townes where do you put the top of the IR?

Skull vertex

18

On an AP Axial Skull/Townes where does the CR enter or exit?

Enters 2 1/2 inches above glabella aka the hairline of normal pt

19

On an AP axial skull/Townes if using OML then CR angle will be

30 degree caudal

20

On an AP Axial Skull/Townes if using an IOML then CR angle will be

37 caudal

21

In a AP axial skull/Townes what structures do you see?

⚫️symmetrical petrous ridges
⚫️posterior portion if foramen magnum
⚫️dorsum sellae and posterior clinoid process projected within the foramen magnum
⚫️occipital bone
⚫️posterior portion of parietal bones

22

For a trauma AP axial Townes what will the angle be? Direction?

40-60 caudal

23

On a SMV (Submentovertical) Schuller Method: IOML ______ with IR

Parallel

24

SMV (Submentovertical) Schuller Method: MSP _____ to IR

Perpendicular

25

On SMV (Submentovertical) Schuller Method what is touching the IR

Top of head

26

On SMV (Submentovertical) Schuller Method where does the CR enter or exit? Need both entrance and exit

Enters MSP of throat between angles of mandible
Exits through a point ¾ inch anterior to level of EAM

27

In SMV (Submentovertical) Schuller Method the CR should pass through what structure within the skull?

Sella turcia

28

On SMV (Submentovertical) Schuller Method the CR should pass ____ inch anterior the EAM

3/4

29

On SMV (Submentovertical) Schuller Method preferably do this with the patient upright or supine?

Upright

30

On SMV (Submentovertical) Schuller Method what structures do you see on this image?

•SMV of the cranial base demonstrates symmetrical petrous portions, the mastoid processes
•Ethmoid and sphenoid sinuses
•Mandible
•Nasal Septum
•Dens
•Occipital Bone
•Mandibular condyles anterior to petrous pyramids.

31

lateral skull: can you do this image upright or lying on the table?

Seated upright or semi prone

32

If you do a lateral skull on the table what position will the patients body be in?

Anterior oblique position

33

Lateral skull: MSP is ____ to the IR when doing a lateral skull.

Parallel

34

Lateral skull: the interpupillary line is ____ to the IR when doing a lateral skull.

Perpendicular

35

The IOML is ____ to the IR when doing a lateral skull.

Parallel

36

On a lateral skull the film is LW or CW for this image?

Crosswise

37

A right lateral demonstrates____ side and a left lateral demonstrates____ side.

-right
-left

38

What Is seen in profile on a lateral skull?

Sella turcia

39

What is superimposed on the lateral skull?

⚫️greater wings of sphenoid
⚫️orbital rods
⚫️mastoid regions and EAMs
⚫️mandibular condyles
⚫️TMJS

40

On the lateral skull what is touching the IR?

Side of head/ temporAl area

41

On a lateral skull where does the CR enter or exit?

Enters 2 inches above EAM

42

What structures do you see on the lateral skull?

⚫️sella turcia
⚫️anterior clinoid process
⚫️dorsum sellae
⚫️posterior clinoid process

43

To do a trauma lateral skull what extra piece of equipment will you need?

Film holder

44

AP/AP axial skull (not Townes) what is the CR?

Axial 15 degree cephalic entering nasion
Ap enters nasion

45

Why do we choose to do a PA or PA axial skull vs AP/Ap axial?

The AP is more magnified

46

What does the Haas method show the same as?

Townes method

47

What's the CR of the haas method? Angle, entrance, and exit

25 cephalic entering 1 1/2 below EOP
Exiting 1 1/2 inches above nasion

48

In the Haas method the OML is ____ to the IR

Perpendicular

49

In the Haas method the MSP is ____ to the IR

Perpendicular

50

On the haas method what part touches the IR?

Forehead and nose

51

Know the structures shown in the Haas method? This is the same as Townes

⚫️occipital region with symmetrical petrous ridges
⚫️dorsum sellae
⚫️posterior clinoid processes within the foramen magnum

52

Why would a technologist choose to do the Haas projection over the the Towne method?

It's used for hypersthenic, obese, or other patients who cannot be adjusted correctly for AP axial