Wrist Flashcards
What are the essential wrist projections?
PA
Lateral
PA oblique
What should the patients position be for a PA/Lateral/Oblique wrist?
seat the patient at the end of the radiographic table
align the shoulder, elbow, and wrist in same plane
What should the axilla be in contact with for the patients position for a PA wrist image?
the axilla should be in contact with the table
What should the part position be for a PA wrist?
wrist joint placed in center of IR and elbow flexed 90 degrees
flex digits slightly to place wrist closer to IR
Where should the central ray be for a PA/lateral/oblique wrist?
perpendicular to midcarpal area
What should the collimation be for a PA wrist?
radiation field 2.5 inches proximal and distal to wrist joint and 1 inch on the sides
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Distal radius and ulna, carpals, and proximal half of metacarpals
no excessive flexion of digits to overlap and obscure metacarpals
no rotation in carpals, metacarpals, radius, and ulna
open radioulnar joint space
For a lateral and oblique wrist, what plane should the upper extremity be in?
the entire upper extremity should be in the same plane
What angle should the elbow be flexed in for a lateral and oblique wrist?
elbow flexed 90 degrees
What surface should the forearm and wrist be resting on for a lateral wrist?
on the medial surface
lateromedial projection
In reference to the IR, what should the radial and ulnar styloid position be like for a lateral wrist?
They should be superimposed and perpendicular to IR
Where should the central ray be for a lateral wrist?
perpendicular to the wrist joint (radiocarpal joint
What are the structures shown in a lateral wrist image
distal radius and ulna, carpals, and proximal half of metacarpals
What is the evaluation criteria for a lateral wrist?
superimposed distal radius and ulna
superimposed metacarpals
bony trabecular detail and surrounding soft tissues
What angle should the the wrist be for a PA oblique wrist image?
45 degree angle with IR
Where should the central ray enter for a PA oblique wrist?
perpendicular to midcarpal area, just distal to radius
What are the structures shown in a PA oblique wrist image?
distal radius and ulna, carpals, and proximal half of metacarpals (lateral metacarpals)
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45 degree rotation of anatomy
slight overlap of the distal radius and ulna
slight interosseous space between third, fourth, and fifth metacarpal bodies
trapezium and distal half of the scaphoid without superimposition
