Scaphoid - Oblique (Ulnar deviation)

Radiographic Positioning

Adult

Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols

Name of projection	Scaphoid Oblique View
Area Covered	Entire scaphoid bone
Pathology shown	Fracture, dislocation, foreign body, infection, tumour, arthritis, see scaphoid radiography
Radiographic Anatomy	Wrist Radiographic Anatomy
IR Size & Orientation	18 x 24cm
Film / Screen Combination	Detail (CR and DR as recommended by manufacturer)
Bucky / Grid	No
Filter	No
Exposure	52 kVp 3.2 mAs
FFD / SID	100cm
Central Ray	Directed to midcarpal area Perpendicular to IR
Collimation	Centre: Midcarpal area Shutter A: From mid metacarpal to one quarter of the distal radius and ulna Shutter B: Skin margin
Markers	Distal and Lateral AP orientation
Shielding	Gonadal (check your department's policy guidelines)
Respiration	Not applicable
Positioning	Seat patient at end of table Flex elbow to 90° Pronate hand and wrist on IR Ulnar deviated the wrist Rotate wrist and hand externally 45° Use a 45° sponge for support / stability if needed
Critique PACEMAN	Positioning Correct obliquity of the wrist is demonstrated by: Trapezoid and trapezium are demonstrated without super-imposition Joint space between trapezoid and trapezium is open Scaphoid waist in profile Trapezoid and capitate have a small degree of super-imposition The second carpometacarpal joint space is demonstrated as is the scaphotrapezium joint space Third metacarpal and mid-forearm are aligned with the light field Ulna head partially super-imposed by distal radius Metacarpals 3 to 5 are mostly super-imposed Area Covered Half the metacarpals, carpals, one quarter of distal radius and ulna Collimation Centre: Mid-carpal area Shutter A: Mid metacarpals to one quarter of distal radius and ulna Shutter B: Skin margin Exposure Bony trabecular patterns and cortical outlines are sharply defined Soft tissues are visualised Sufficient contrast and density to demonstrate the scaphoid fat stripe
Special Notes