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Jun 17 2011, 10:51 AM EDT (current) AndyC 9 words added, 9 words deleted
May 26 2011, 9:17 PM EDT AndyC 4 words added, 1 word deleted

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Radiographic Positioning


Adult
Other related pages of interest

Name of projection Scaphoid Oblique View
Area Covered Entire scaphoid bone
Pathology shown Fracture, dislocation, foreign body, infection, tumour, arthritis, see scaphoid radiography
Radiographic Anatomy Wrist Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Film / Screen Combination Detail
(CR and DR as recommended by manufacturer)
Bucky / Grid No
Filter No
Exposure 52 kVp
3.2 mAs
FFD / SID 100cm
Central Ray Directed to midcarpal area
Perpendicular to IR
Collimation Centre: Midcarpal area
Shutter A: From mid metacarpal to one quarter of the distal radius and ulna
Shutter B: Skin margin
Markers Distal and Lateral
AP orientation
Shielding Gonadal (check your department's policy guidelines)
Respiration Not applicable
Positioning
  • Seat patient at end of table
  • Flex elbow to 90 degrees 90°
  • Pronate hand and wrist on IR
  • Ulnar deviated the wrist
  • Rotate wrist and hand externally 45 degrees 45°
  • Can useUse a 45 degree45° sponge for support/stabilitysupport / stability if needed
Critique

Positioning
  • Correct obliquity of the wrist is demonstrated by:
    • Trapezoid and trapezium are demonstrated without super-imposition
    • Joint space between trapezoid and trapezium is open
    • Scaphoid waist in profile
    • Trapezoid and capitate have a small degree of super-imposition
  • The second carpometacarpal joint space is demonstrated as is the scaphotrapezium joint space
  • Third metacarpal and mid-forearm are aligned with the light field
  • Ulna head partially super-imposed by distal radius
  • Metacarpals 3 to 5 are mostly super-imposed
Area Covered
  • Half the metacarpals, carpals, one quarter of distal radius and ulna
Collimation
  • Centre: Mid-carpal area
  • Shutter A: Mid metacarpals to one quarter of distal radius and ulna
  • Shutter B: Skin margin
Exposure
  • Bony trabecular patterns and cortical outlines are sharply defined
  • Soft tissues are visualised
  • Sufficient contrast and density to demonstrate the scaphoid fat stripe
Special Notes