Subtalar Joint - AP Axial Oblique - Medial RotationThis is a featured page

Radiographic Positioning


Adult
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Name of projection Subtalar Joint - AP Axial Oblique - Medial Rotation (Broden) (Clarks)
Area Covered Distal tibia and fibula, entire talus and calcaneum, proximal tarsal bones
Pathology shownShows posterior articular surface of the calcaneus to determine presence of joint involvement in fractures
Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Landscape
Film / Screen Combination Detail
(CR and DR as recommended by manufacturer)
Bucky / Grid No
FilterNo
Exposure 60 kVp
3.2 mAs
FFD / SID 100cm
Central Ray CR directed to a point 2 cm caudoanteriorly to the lateral malleolus

Obtain four images with the CR angled cephalad at
  1. 40° - shows anterior portion of articulation
  2. 30° - shows middle portion of articulation
  3. 20° - shows middle portion of articulation
  4. 10° - shows posterior part of posterior articulation
Collimation Four sides of collimation
collimate to ankle jont and calcaneum
Markers Distal and lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
RespirationNot applicable
Positioning
  • Patient supine
  • Patient's leg fully extended on the table
  • Place IR under the ankle
  • Rotate lower leg medially 45°
  • Foot dorsiflexed to 90°
  • CR directed to a point 2 cm caudoanteriorly to the lateral malleolus
  • Obtain four images with the CR angled cephalad at 10°, 20°, 30°, 40°
Critique

Positioning
Area Covered
Collimation
Exposure
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 18 2011, 4:36 PM EDT (about this update About This Update AndyC Edited by AndyC

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