Olecranon Process - PA Axial Projection

Tuesday, May 15, 2018

Olecranon Process - PA Axial Projection

Image Receptor: 8 X 10 inch

Patient Position

Let patient seat at the end of the radiographic table, high enough that the forearm can rest flat on the image receptor.

Part Position:

  • Adjust the arm at an angle of 45 to 50 degrees from the vertical position and ensure that the patient is not leaning anteriorly or posteriorly.
  • Supinate the hand and have the patient to immobilize it with the opposite hand.
  • Center a point midway between the epicondyles and the center of the image receptor.
  • Shield gonads.

Central ray:

The central ray is perpendicular to the olecranon process to demonstrate the dorsum of the olecranon process and at a 20 degree angle to the wrist to demonstrate the curved extremity and articular margin of the olecranon process.

Structure shown:

This projection demonstrate the olecranon process and the articular margin of the olecranon and humerus.

0 degree angulation

20 degrees angulation

Evaluation Criteria:

  • The following should be clearly demonstrated:
  • Olecranon process in profile
  • Soft tissue outside the olecranon process
  • Forearm and humerus superimposed
  • No rotation of the elbow.

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