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RADT Review > Skull Prep > Flashcards

Skull Prep Flashcards

1
Q

GML stands for

A

Glabellomeatal line

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2
Q

OML stands for

A

Orbitomeatal line

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3
Q

IOML stands for

A

Infraorbitomeatal line

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4
Q

AML stands for

A

Acanthiomeatal line

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5
Q

LML stands for

A

Lips-meatal line

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6
Q

MML stands for

A

Mentomeatal line

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7
Q

CR angle for AP Axial Cranium (Towne Method)

A

30 degrees caudal to OML
- or -
37 degrees caudal to IOML

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8
Q

CR centering for AP Axial Cranium (Towne Method)

A

At MSP 2.5 inches above glabella

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9
Q

For the Towne Method, the ______ ______ should be symmetric

A

Petrous ridges

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10
Q

Correct CR angle and proper neck flexing in the Towne Method are indicated by _________

A

Dorsum sellae and posterior clinic processes visualized in the foremen magnum

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11
Q

Lateral cranium CR angle

A

Perpendicular

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12
Q

Positioning for Towne method

A

Depress chin, bringing OML perpendicular to the IR (if patient unable to flex, IOML perpendicular)

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13
Q

CR centering for Lateral Cranium

A

2 inches superior to EAM or halfway between glabella and inion for other types of skull morphologies

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14
Q

No tilt in a lateral cranium will be indicated by ______

A

Superimposed orbital plates (roof)

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15
Q

No rotation in a lateral cranium will be indicated by ______

A

Superimposition of greater wings of sphenoid and mandibular rami

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16
Q

Caldwell method positioning, facing (board/tube)

A

OML perpendicular to IR, facing board

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17
Q

The Towne Method is (a/an) ___ projection

The Caldwell Method is (a/an) ___ projection

A

AP axial, PA or PA axial

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18
Q

PA Caldwell CR angle and centering

A

Perpendicular, exit at glabella

19
Q

PA Axial Caldwell CR angle and centering

A

15 caudad to OML, exit at nasion

20
Q

What does SMV stand for?

A

Submentovertical

21
Q

Patient position for SMV

A

hyperextend neck to get IOML parallel to IR, rest head on vertex

22
Q

CR angle for SMV

A

Perpendicular to IOML

23
Q

CR centering for SMV

A

1.5 inches inferior to mandible symphysis or midway between gonions (approx. 0.75 inches anterior to level of EAM)

24
Q

Patient position for facial bones

A

Lateral side of head (side of interest) on IR

25
Q

CR angle for facial bones

A

Perpendicular

26
Q

CR centering for facial bones

A

Zygoma (prominence of cheek), midway between outer canthus and EAM

27
Q

Patient positioning for Waters

A

Extend neck to get MML perpendicular to IR ~OR~ OML 37 degrees to IR

28
Q

CR angle for Waters

A

Perpendicular

29
Q

CR centering for Waters

A

Exit at acanthion

30
Q

Patient positioning Modified Waters

A

OML 55 degrees to plane of IR/LML perpendicular to IR

31
Q

CR angle Modified Waters

A

Perpendicular

32
Q

CR centering Modified Waters

A

Exit at acanthion

33
Q

What is the technical name for Waters/Modified Waters?

A

Parietoacanthial/Modified Parietoacanthial

34
Q

IPL stands for

A

Interpupillary line

35
Q

How would you do a reverse Waters (in a trauma scenario)?

A

-AP projection
-CR parallel to MML, centering at acanthion

36
Q

How would you do a reverse Modified Waters (in a trauma scenario)?

A

-AP projection
-CR parallel to junction of LML centering at acanthion

37
Q

Patient positioning for nasal bones

A

Head in true lateral position

38
Q

CR angle for nasal bones

A

Perpendicular

39
Q

CR centering for nasal bones

A

0.5” inferior to nasion

40
Q

Patient positioning Bilateral SMV for Zygomatic Arches

A

extend neck to get IOML parallel to IR

41
Q

CR angle for Bilateral SMV for Zygomatic Arches

A

Perpendicular to IOML (likely perpendicular to board)

42
Q

CR centering for Bilateral SMV for Zygomatic Arches

A

~1.5 inches inferior to mandibular symphysis

43
Q

The parieto-orbital oblique is also called ———-

A

Rhese Method

RADT Review (3 decks)

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