AP Oblique Projection - Medial Rotation Wrist Xray Positioning

Thursday, April 12, 2018

AP Projection - Medial Rotation Wrist

Image receptor: 8 x 10 inch, lengthwise or crosswise for two images on one image receptor.

Patient Position

Seat the patient at the end of the radiographic table.
Have the patient rest the forearm on the table in the supine position.

Part Position:

Place the image receptor under the wrist and center it at the dorsal surface of the wrist.
Rotate the wrist medially (internally) until it forms a semisupinated position of approximately 45 degrees to the IR.
Shield gonads.

Central ray:

Central ray is perpendicular to the midcarpal area. It enters the anterior surface of the wrist midway between its medial and lateral borders.

Structure shown:

This position separates the pisiform from the adjacent carpal bones. It also gives a more distinct radiograph of the triquetrum and hamate.

Evaluation Criteria:

  • The following should be clearly demonstrated:
  • Carpals on medial side of wrist
  • Triquetrum, hamate and posiform free of superimposition and in profile.
  • Distal radius and ulna, carpals and proximal half of metacarpals.
  • Radiographic quality soft tissue and bony trabeculation.

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