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Positioning for Placement Blocks > Wrist and Scaphoid > Flashcards

Wrist and Scaphoid Flashcards

1
Q

what is the SID used for Wrist and scaphoid projections

A

100-110cm

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2
Q

what is the kV used for Wrist and scaphoid projections

A

50-60kVp

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3
Q

what is the mAs used for Wrist and scaphoid projections

A

1.5-2.5mAs

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4
Q

are grids used for Wrist and scaphoid projections

A

no grid

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5
Q

what is the CP for lateral/PA/Oblique projections

A

perpendicular to the mid carpals

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6
Q

what is the collimation for lateral/PA/Oblique projections

A

mid metacarpals

distal 1/3 radius/ulnar and wrist

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7
Q

what must be done to the lateral wrist to superimpose the styloid processes

A

turned out a little from handshake position

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8
Q

what is the CP for carpal tunnel projections

A

25-35*

3cm distal to 3rd metacarpals

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9
Q

what is the patient positioning in terms of the hands rotation for a carpal tunnel view

A

rotate hand and wrist 10* towards radius

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10
Q

what are the 4 views for the wrist

A

lateral
PA
Oblique
Carpal tunnel view

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11
Q

what are the 4 views for the scaphoid

A

lateral
oblique
axial
PA

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12
Q

which of the 4 scaphoid views need deviation

which side is the deviation towards

A

ulnar deviation

all except lateral

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13
Q

what is the CP for the scaphoid views

A

10-15*

anatomical snuffbox

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14
Q

what is the positioning for wrist in terms of image evaluation

in terms of elbow, hand and forearm

A

elbow flexed

hand and forearm on table

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15
Q

what is the image critique for wrist views in terms of position

A

shoulder, elbow, wrist on same plane

arm flexed for one view, straight for another view

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16
Q

what is the image critique for true lateral wrist views in terms of fingers, hand and wrist position

2 things for wrist
3 things for fingers
3 things for hands

A

wrist

  • distal ulnar head superimposed on distal radius
  • proximal metacarpals superimposed

Fingers

  • concave anterior surface of shaft of phalanges
  • 2-5th MC superimposed
  • scaphoid and pisiform superimposed

Hands

  • distal radius and ulna superimposed
  • metacarpals superimposed
  • phalanges superimposed
17
Q

what are 3 image critiques for scaphoid views

A

Scaphoid seen without superimposition

Scaphoid not foreshortened

18
Q

what is the area of interest for wrist views in terms of image critique

A

Distal radius and ulna to mid metacarpals

Positioning for Placement Blocks (9 decks)

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