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RAD 2 > Zygomatic arches Positioning > Flashcards

Zygomatic arches Positioning Flashcards

1
Q

What SID is used for zygomatic arch views?

A

40”

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2
Q

What IR is used for zygomatic arch views?

A

10x12

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3
Q

What breathing technique is used for zygomatic arch views?

A

Suspended breathing

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4
Q

What are the structures seen for a submentovertical zygomatic arch view?

A
  • Symmetrical bilateral zygomatic arches or “jug handles”
  • No rotation of head
  • If one side is not visualized, perform tangential projection
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5
Q

What are jug handles?

A

bilateral zygomatic arches

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6
Q

Whats another name for bilateral zygomatic arches?

A

Jug handles

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7
Q

Where is the CR for a submentovertical zygomatic arch view?

A

Perpendicular to IOML, entering at MSP and 1” posterior to outer canthi

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8
Q

Where is the MSP for a submentovertical zygomatic arch view?

A

Perpendicular to IR

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9
Q

How is the patient positioned for a submentovertical zygomatic arch view?

A
  • Patient is upright (can be done supine but is more difficult for patient)
  • Flex head back to place IOML parallel with the IR
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10
Q

Why would you have to angle the CR for a submentovertical zygomatic arch view?

A

So that it enters perpendicular to the IOML

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11
Q

What would you have to do to the CR so that it enters perpendicular to the IOML for a submentovertical zygomatic arch view?

A

Angle it

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12
Q

Whats another name for an axial oblique zygomatic arch view?

A

Tangential projection

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13
Q

Whats another name for a tangential projection zygomatic arch view?

A

Axial oblique

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14
Q

What are the structures seen for an axial oblique (aka tangential) zygomatic arch view?

A

Zygomatic arch free from overlying structures

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15
Q

Where is the CR for an axial oblique (aka tangential) zygomatic arch view?

A

Perpendicular to IOML and centered to the zygomatic arch at a point 1” posterior to outer canthus

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16
Q

How is the patient positioned for an axial oblique (aka tangential) zygomatic arch view?

A
  • Patient is seated upright (can be supine but is more difficult for patient)
  • Flex head back to place IOML parallel with IR
  • Rotate MSP 15 degrees toward affected side
  • Tilt top of head 15 degrees away from affected side
17
Q

Why would you have to angle the CR for an axial oblique (aka tangential) zygomatic arch view?

A

So that it enters perpendicular to IOML

18
Q

What do you do to the CR for an axial oblique (aka tangential) zygomatic arch view so that it enters perpendicular to the IOML?

A

Angle it

19
Q

Whats another name for the parietoacanthial zygomatic arch view?

A

Waters method

20
Q

Whats another name for the waters method zygomatic arch view?

A

Parietoacanthial projection

21
Q

What are the structures seen for a parietoacanthial (waters method) zygomatic arch view?

A
  • Distance between the lateral border of skull and orbit equal on each side
  • Petrous ridges below maxillary sinuses
  • Demonstrates the maxillae, orbits, and zygomatic arches
22
Q

Where is the CR for a parietoacanthial (waters method) zygomatic arch view?

A

Exits the acanthion

23
Q

Where is the MSP for a parietoacanthial (waters method) zygomatic arch view?

A

Perpendicular to IR

24
Q

Where is the OML for a parietoacanthial (waters method) zygomatic arch view?

A

37 degrees with plane of IR

25
Q

Where is the MML for a parietoacanthial (waters method) zygomatic arch view?

A

Perpendicular to the plane of IR

26
Q

How is the patient positioned for a parietoacanthial (waters method) zygomatic arch view?

A
  • Patient is prone/PA upright (upright is best)
  • Chin on table/bucky
  • Nose will be 3/4” from bucky/table
27
Q

What are the structures seen for a right/left lateral zygomatic arch view?

A
  • Zygomatic bone in the center of the image
  • Almost perfectly superimposed mandibular unit
  • Superimposed orbital roofs
  • No rotation of sell turcica
28
Q

Where is the CR for a right/left lateral zygomatic arch view?

A

Enters lateral surface of the zygomatic bone halfway between the canthus and EAM

29
Q

Where is the MSP for a right/left lateral zygomatic arch view?

A

Parallel to IR

30
Q

Where is the IP line for a right/left lateral zygomatic arch view?

A

Perpendicular to IR

31
Q

Where is the IOML for a right/left lateral zygomatic arch view?

A

Perpendicular to front edge of IR

32
Q
A

RAD 2 (34 decks)

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