Acromioclavicular joint (Zanca view)

The Zanca view is a specialized projection of the acromioclavicular joint, it is used to both demonstrate the AC joint free from superimposition, and aid in the assessment of distal osteophytes.

See also, acromioclavicular joint injuries.

  • patient is erect
  • midcoronal plane of the patient is parallel to the image receptor, in other words, the patient's back is against the image receptor
  • acromioclavicular joint of the affected side is at the center of the image receptor
  • affected arm is in a neutral position by the patient side
  • anteroposterior projection
  • centring point
    • at the acromioclavicular joint with a 10-15 cephalad angle 
  • collimation
    • superior to the skin margins
    • inferior to the humeral head
    • lateral to include the skin margin
    • medial to lateral third of the clavicle
  • orientation  
    • landscape
  • detector size
    • 18 cm x 24 cm
  • exposure
    • 40-50 kVp
    • 10-15 mAs
  • SID
    • 100 cm
  • grid
    • no 
  • the acromioclavicular joint is free from superimposition 

The differences between this projection and a standard AP are the cephalic angle and the decrease in kVp. 

Radiographic views
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Article information

rID: 68162
Synonyms or Alternate Spellings:
  • Zanca view

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Cases and figures

  • Figure 1: Zanca view
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  • Figure 2: Zanca view weight bearing
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