Humerus - Lateral Transthoracic

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Radiographic Positioning

Other related pages of interest

Name of projection Humerus - Transthoracic Lateral
Area Covered Proximal humerus and glenohumeral joint visualised through the thorax without superimposition of the opposite shoulder
Pathology shownFractures and or dislocation of the proximal humerus
Radiographic AnatomyHumerus Radiographic Anatomy
IR Size & Orientation 24 x 30cm
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or stationary grid
Exposure 80 kVp
50 mAs
or use a 3 second breathing technique (to blur rib and lung structure)
FFD / SID 100cm
Central Ray CR perpendicular to IR
CR to level of surgical neck
Collimation Four sides of collimation to the area of interest
Markers Anterior
Marker orientation is AP
Shielding Gonadal (check your department's policy guidelines)
RespirationNo suspension of breath - Use the breathing technique
Expose while the patient is holding still and breathing shallowly
PositioningThis position is used when the patient is unable to abduct arm for the AP or Lateral humerus

Can be performed erect or supine (erect is preferred)

  • Place patient in lateral position with side of interest against upright bucky
  • Place affected arm at patients side in neutral rotation, drop shoulder if possible
  • Raise opposite arm and place hand over top of head, elevate shoulder as much as possible to prevent superimposing affected shoulder
  • Ensure thorax is in true lateral position
  • CR perpendicular to IR
  • CR to level of surgical neck

Area Covered
Special Notes