Wrist & Forearm RAD 1 Positioning Flashcards

1
Q

What is the SID used for Wrist & Forearm?

A

40”

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2
Q

What IR is used for Wrist positioning?

A

10 x 12

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3
Q

Where is the CR located for PA Wrist?

A

Perpendicular to Mid-carpal

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4
Q

What structures are seen in PA Wrist?

A
  • PA projection of carpals, distal radius & ulna, and proximal metacarpals
  • Open radioulnar joint space
  • No rotation in carpals, metacarpals, or radius
  • slight rotation of the ulna
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5
Q

Where is the CR located for 45 degree PA Lateral Oblique Wrist?

A

Perpendicular to midcarpal area, entering just distal to the radius

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6
Q

What structures are seen for a 45 degree PA Lateral Oblique Wrist?

A
  • Trapezium is best demonstrated
  • Distal half of scaphoid is seen
  • Slight overlap of distal radius, ulna, and other carpals
  • Open trapeziotrapezoid & scaphiotrapezial joint space
  • Demonstrates carpals on the lateral side of wrist
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7
Q

Where is CR located for 45 degree PA Medial Oblique Wrist?

A

Perpendicular to midcarpal ares, entering just distal to the radius

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8
Q

What structures are seen for a 45 degree PA Medial Oblique Wrist?

A
  • Demonstrates carpals on the medial side of the wrist
  • Pisiform, lunate, and triquetrum is seen
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9
Q

Where is the CR located for a 45 degree AP Medial Oblique Wrist?

A

Perpendicular to midcarpal area, entering the anterior surface of the wrist

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10
Q

What structures are seen in a 45 degree AP Medial Oblique Wrist?

A
  • Demonstrates carpals on the medial side of the wrist
  • Pisiform is best demonstrated
  • No superimposition of the triquetrum, hook of hamate, and pisiform
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11
Q

Where is the CR located for a Lateromedial wrist

A

Perpendicular to the wrist joint

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12
Q

What sturctures are seen in a Lateromedial wrist?

A
  • Superimposed distal radius and ulna
  • Superimposed metacarpals
  • Demonstrates any anterior/posterior displacement due to a fx and localization of any foreign body
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13
Q

Where is the CR located for a PA wrist ulnar deviation?

A

Perpendicular to scaphoid

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14
Q

What structures are seen in a PA wrist ulnar deviation?

A
  • Scaphoid best demonstrated with no superimposition
  • No rotation of carpals, metacarpals, radius, or ulna
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15
Q

Where is the CR located for a PA Axial wrist projection for scaphoid?

A

20 degrees cephalic entering at the scaphoid

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16
Q

What structures are seen in a PA Axial wrist projection for scaphoid?

A
  • Scaphoid best demonstrated without superimposition
  • No rotation of carpals, metacarpals, radius, or ulna
17
Q

What is another name for the PA Axial wrist projection for scaphoid?

A

Stretcher method

18
Q

What does the bridgeman method suggest for a PA Axial wrist projection for scaphoid?

A

To place wrist in ulnar deviation

19
Q

Where is the CR located for a tangential wrist?

A

1” distal to the base of the 3rd metacarpal

20
Q

What structures are seen for a tangential wrist?

A
  • Demonstrates carpal canal
  • Palmar aspect and tubercle of trapezium seen
  • Visualizes the scaphoid, capitate, hook of hamate, triquetrum, and entire pisiform
  • Pisiform in profile and free of superimposition
  • Helpful in identifying fractures of the hook of hamates, pisiform, and trapezium
21
Q

What is another name for the tangential wrist?

A

Carpal canal aka gaynor-hart method

22
Q

What IR is used for a forearm?

A

14 x 17

23
Q

Where is the CR located for an AP forearm?

A

Perpendicular to mid-shaft

24
Q

What structures are seen in a AP forearm?

A
  • Slight superimposition of radial head, neck, and tuberosity over proximal ulna
  • Demonstrates entire forearm, both wrist and elbow joint
  • Open radioulnar space
  • No elongation for foreshortening of the humeral epicondyles
25
Q

Where is the CR located for an lateromedial forearm?

A

Perpendicular to mid-shaft

26
Q

What structures are seen in a lateromedial forearm?

A
  • Demonstrates the entire forearm, wrist, and elbow joint
  • Superimposition of distal radius and ulna
  • Superimposition of radial head over the coronoid process
  • Superimposed humeral epicondyles