Wednesday, 25 April 2012

Elbow

AP

Indications for imaging
Trauma, loose bodies, bone pain,
Anatomy  Demonstrated

Anatomy of the Rt Elbow AP
Meschan, I. 1955 An Atlas of Normal Radiographic Anatomy Saunders, London
Basic Patient Position
The patient sits alongside the end of the table with the affected arm fully extended and the hand supinated, the table top should be raised to the level of the lower border of the axilla so the whole arm is supported and parallel to the cassette. The patient should lean externally to bring the humeral epicondyles equidistant from the film, in this position the wrist will be externally rotated from AP.

 Right Elbow AP Patient Position
Meschan, I. 1955 An Atlas of Normal Radiographic Anatomy Saunders, London
Radiation protection
Direct lead rubber gonad protection using a "half apron".
Ensure the lower limbs and torso are not below the table top in the primary beam.
Central Ray
The vertical central ray is centered midway between the skin surfaces to the joint space which is approximately 3 cm below a line bisecting the humeral epicondyles. The long axis if the arm should be in line with the long axis of the tube.
Exposure Factors
Kv mAS FFD (cm) Grid Focus AEC Cassette
65 6 100 No Fine No 24 x 30 cm
Evaluation of the Image
ID and markers must be present and correct in the appropriate area of the film
Limits of the examination, superiorly distal 10 cm humerus, inferiorly proximal 10 cm forearm. laterally the skin surfaces.
Evidence of collimation on four sides equally around the centering point.
The open joint space should be visible.
The medial quarter of the radial head will be superimposed on the ulna.
AP Right Elbow
Related Projections
Elbow Lat
Elbow Head of Radius
Elbow Axial
Additional modalities
MRI for joint and soft tissue structures

No comments:

Post a Comment