Finger - PA

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Radiographic Positioning

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Name of projection Finger - PA
Area Covered Phalanges of affected digit and distal half of adjoining metacarpal
Pathology shown Fracture, dislocation, foreign body, infection, tumour, arthritis
Radiographic Anatomy Hand Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Landscape, divided for multiple finger images, use lead masking for unused area
Film / Screen Combination Detail
(CR and DR as recommended by manufacturer)
Bucky / Grid No
Filter No
Exposure 50 kVp
2 mAs
FFD / SID100cm
Central Ray Directed to the proximal interphalangeal joint of affected digit
Perpendicular to the IR
Collimation Centre: Proximal interphalangeal joint
Shutter A: From end of distal phalanx to half adjoining metacarpal
Shutter B: To include soft tissue
Markers Distal and Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
Respiration Not applicable
  • Seat patient at end of the table
  • Forearm placed on table
  • Extend digit palmar surface down
  • Palm and digit positioned flat against IR
  • Separate digits
  • Align the digit with both the IR and the central ray
  • Proximal interphalangeal joint of interest in centre

  • No rotation of the digit demonstrated by
    • Equal concavity of phalangeal shaft
    • equal amount of soft tissue on both sides of the phalanges
    • fingernail, if seen, will be centred
  • No soft tissue overlap
  • Metacarpophalangeal joint and interphalangeal joint spaces open
  • Long axis of digit is aligned with long axis of IR
  • Long axis of digit parallel with IR/cassette
  • Phalanges not foreshortened
Area Covered
  • Distal, middle and proximal phalanx and distal half adjoining metacarpal
  • From distal phalanx to half adjoining metacarpal and soft tissue
  • Bony trabecular patterns and cortical outlines are sharply defined
  • Soft tissues are visualised
Special Notes