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:] > LRA-226 Positions > Flashcards

LRA-226 Positions Flashcards

1
Q

what is the clinical indication for a PA axial Caldwell?

A

fractures and neoplastic or inflammatory processes of the facial bones

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2
Q

what is the patient position for an PA axial Caldwell?

A
  • place the patient’s forehead and nose against the IR
  • flex chin so the OML is aligned with the EAM
  • alignment must be perpendicular to the IR
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3
Q

what is the CR for a PA axial Caldwell?

A
  • tube angle of 15 degrees caudal
  • exits at the nasion
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4
Q

what anatomy is demonstrated in the PA axial Caldwell?

A
  • frontal bone
  • greater/lesser sphenoid wings
  • superior orbital fissure
  • frontal/anterior ethmoid sinuses
  • SOM
  • crista galli
  • petrous ridges projected lower one-third of orbits
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5
Q

what is the clinical indication for a waters method/parietoacanthial projection?

A
  • fractures (tripod and Le Fort fractures)
  • neoplastic or inflammatory processes
  • foreign bodies in the eye
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6
Q

what is the patient position for a water’s method/parietoacanthial projection?

A
  • extend chin to align EAM to MML
  • alignment will be perpendicular to the IR
  • chin must be up against the IR
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7
Q

what is the CR for a Water’s method/parietoacanthial projection?

A
  • CR perpendicular to the IR
  • exiting the acanthion
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8
Q

what is the clinical indication for a Modified Water’s/modified parietoacanthial projection?

A
  • orbital fractures (blowout)
  • neoplastic or inflammatory processes
  • foreign bodies in the eye
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8
Q

what is the patient position for a Modified water’s/modified parietoacanthial projection?

A
  • extend chin to align EAM with LML
  • alignment will be perpendicular to the IR
  • rest chin against the IR
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9
Q

what anatomy is demonstrated in the Water’s method/parietoacanthion projection?

A
  • IOMs
  • maxillae
  • nasal septum
  • zygomatic bones
  • zygomatic arches
  • anterior nasal spine
  • petrous ridges inferior to the floor of maxillary sinuses
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10
Q

what is the CR for a Modified water’s/modified parietoacanthial projection?

A
  • CR perpendicular to the IR
  • exits the acanthion
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11
Q

what anatomy is demonstrated in the Modified water’s/modified parietoacanthial projection?

A
  • inferior orbital floors in profile
  • ideal projection to demonstrate possible “blowout” fractures of orbital floor
  • petrous ridges projected in lower one-half of maxillary sinuses
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12
Q

what is the clinical indication for a Lateral facial bones?

A
  • fractures and neoplastic/inflammatory processes of facial bones, orbits, and mandible
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13
Q

what is the patient position for a Lateral facial bone?

A
  • body of interest closest to the IR
  • face at a true lateral (as close as possible to IR)
  • align IOML with the EAM
  • alignment will be parallel to the IR
  • IOML will be perpendicular to the front edge of the IR
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14
Q

what is the CR for a Lateral facial bone?

A
  • CR perpendicular to the IR
  • CR is at the zygoma (between the outer canthus and the EAM)
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15
Q

what anatomy is demonstrated in a Lateral facial bone?

A
  • superimposed facial bones
  • greater wings of sphenoid
  • orbital plates
  • sella turcica
  • zygoma
  • mandible
16
Q

what is the clinical indication for a Lateral nasal bone?

A
  • nasal bone fractures
  • both sides should be examined for comparison, with side closest to the IR best demonstrated
17
Q

what is the patient position for a Lateral nasal bone?

A
  • body of interest closest to the IR
  • face at a true lateral, against the IR
  • EAM aligned with the IOML
  • alignment will be perpendicular to the IR
  • IOML is perpendicular to the front edge of the IR
18
Q

what is the CR for a Lateral nasal bone?

A
  • 1/2 inch inferior/below the nasion
  • CR perpendicular to the IR
19
Q

what anatomy is demonstrated in a Lateral nasal bone?

A
  • nasal bone with soft tissue nasal structures
  • frontonasal suture
  • anterior nasal spine demonstrated
  • complete profile of nasal bone
20
Q

what is the SID for the nasal series?

A

40 inches SID

21
Q

what is the size of the IR for nasal series?

A

8x10” or 10x12”

22
Q
A

:] (89 decks)

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