Wrist - Carpal Bridge

Radiographic Positioning

Adult

Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols

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 shown	Calcifications or other pathology of the dorsal aspect of the carpal bones
Radiographic Anatomy	Wrist Radiographic Anatomy
IR Size & Orientation	18 x 24cm Landscape
Film / Screen Combination	Detail (CR and DR as recommended by manufacturer)
Bucky / Grid	No
Filter	No
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)
Respiration	Not 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 PACEMAN	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