Wrist - Carpal BridgeThis is a featured page

Radiographic Positioning


Adult
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Name of projection Wrist - Carpal Bridge
Area Covered A tangential view of the dorsal aspect of the scaphoid, lunate and triquetrium, an outline of the capitate and trapezium superimposed is visible
Pathology shownCalcifications or other pathology of the dorsal aspect of the carpal bones
Radiographic AnatomyWrist 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 50 kVp
2mas
FFD / SID 100cm
Central Ray CR angled 45° to the long axis of the forearm
Direct CR to a midpoint of the distal forearm about 4cm proximal to the wrist joint
Collimation Collimate on four sides to area of interest
Markers Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
RespirationNot applicable
Positioning
  • Patient seated or standing at end of table
  • Patient to lean over and place dorsal surface of hand (palm up) on IR
  • Centre dorsal aspect of carpals to IR
  • Flex wrist as far as patient can tolerate or until the hand and forearm are 90°
  • CR angled 45° to the long axis of the forearm, directed to a midpoint of the distal forearm about 4cm proximal to the wrist joint
Critique

Positioning
Area Covered
Collimation
Exposure
  • Optimal density and contrast should visualize soft tissue and possible calcifications in carpal canal region
  • Outlines of superimposed carpals should be visible with overexposure of these carpals in profile
  • Trabecular markings and bony margins should appear clear and sharp, indicating no motion
Special Notes



AhmadAnsarullah
AhmadAnsarullah 		Latest page update: made by AhmadAnsarullah , Oct 11 2011, 11:17 AM EDT (about this update About This Update AhmadAnsarullah Edited by AhmadAnsarullah

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