Saturday, April 7, 2012


Pathology Demonstrated:

  • Fractures and/or dislocation of the proximal humerus and fractures of the glenoid labrum or brim are demonstrated; may demonstrate a Bankart lesion, erosion of glenoid rim, and the integrity of the scapulohumeral joint; also may demonstrate certain pathologies, such as osteoporosis and osteoarthritis.

Technical Factor:

  • IR size - 18 x 24 cm (8 x 10 inches), crosswise
  • Moving or stationary grid
  • 75 +- 5 kV range
  • mAs 7


    Upright AP oblique glenoid cavity: Grashey method.
  • Place gonadal shielding over pelvic area.

Patient Position:

  • Perform radiograph with the patient in an erect or supine position. (The erect position is usually less painful for patient, if conditions allows.)

Part Position:

  • Rotate body 35 to 45 degree toward affected side.
  • If the radiograph is performed with the patient in supine position, place supports under elevated shoulder and hip to maintain this position.
  • Center mid-scapulohumeral joint to CR and to center of IR.
  • Adjust cassette so that top of IR is about 2 inches (5 cm) from lateral border of humerus.
  • Abduct arm slightly with arm in neutral rotation.

Recumbent AP oblique glenoid cavity: Grashey method
Central Ray:

  • CR perpendicular to IR, centered to scapulohumeral joint, which is approximately 2 inches (5cm) inferior and medial form the superolateral border of shoulder.
  • Minimum SID of 40 inches (100cm)


  • Collimate so upper and lateral borders of the field are to the soft tissue margins.


  • Suspend respiration during exposure.


  • The degree of rotation varies depending on how flat or round the shoulder of the patient are:
  • Having a rounded or curved shoulder and back requires more rotation to place the body of the scapula parallel to the IR.

Radiographic Criteria:

Structures Shown:

AP oblique glenoid cavity: Grashey method

  • Glenoid cavity should be seen in profile without superimposition of humeral head.


  • The scapulohumeral joint space should be open.
  • Anterior and posterior rims of glenoid cavity are superimposed.

Collimation and CR:

  • Collimation should be visible on four sides to area of affected shoulder.
  • AP oblique glenoid cavity: Grashey method
    Showing moderate deterioration of the scapulohumeral joint
  • CR and center of the collimation field should be at the mid-glenohumeral joint.

Exposure Criteria:

  • Optimal density and contrast with no motion will visualize soft tissue margins and clear, sharp bony trabecular markings.
  • Soft tissue detail of the joint space and axilla should be visualized.

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