Wrist
What is a baseline technique for a wrist?
How much should you increase your technique if a patient comes in wearing a larger plaster cast?
8-10 kVp or 100% mAs
If the wrist is in a true lateral position, the ulnar head should be superimposed over the distal radius and the proximal 2nd-5th metacarpals all should appear aligned and superimposed.
True
The PA projection with radial deviation best demonstrates the interspaces on the ulnar side of the wrist between the lunate, triquetrum, pisiform, and hamate bones.
True
The anterior surface of the wrist should be in contact with the IR for the PA projection radiograph
True
The hand and digits should be slightly flexed for the PA projection of the wrist in order to place the wrist and carpal area in close contact with the IR
True
When performing the PA projection of the wrist, the CR should be directed perpendicularly entering the midcarpal area.
True
How much should you increase your technique if a patient comes in wearing a fiber glass cast?
3-4 kVp or 25%-30% mAs
How much should you increase your technique if a patient comes in wearing a small to medium plaster cast?
5-7 kVp or 50%-60% mAs
What carpal bone does the 3rd metacarpal bone articulate with a) Capitate b) Hamate c) Trapezoid d) Trapezium
a) Capitate
Under what circumstances would you NOT want to attempt the tangential views of the wrist? a) possible wrist trauma b) patients cries out in pain c) Massive swelling of the wrist joint d) None of the above apply
a) possible wrist trauma
Which special projection of the wrist will open up the interspaces on the ulnar side of the wrist? a) radial deviation b) carpal bridge c) ulnar deviation d) carpal canal
a) radial deviation
What is the CR angle for the stechers view of the scaphoid a) 45º toward elbow b) 0º c) 10º-15º toward elbow d) 45º away from elbow
b) 0º angle
How much is the hand elevated from the IR for the Stecher method? a) 10 degrees b) 20 degrees c) 15 degrees d) None of the above
b) 20 degrees
How much rotation is required for an oblique projecting of the wrist? a) 20-25 degrees b) 45 degrees c) 90 degrees d) None of the above
b) 45 degrees
What is the name of the two special turning or bending positions of the hand and wrist that demonstrate medial and lateral aspects of the carpal regions? a) radial and carpal deviation b) radial and ulnar deviations c) scaphoid and radial deviation d) pronator and ulnar deviation
b) radial and ulnar deviations
Which is the most commonly fractured carpal bone? a) lunate b) scaphoid c) trapezium d) hamate
b) scaphoid
Which alternative projection to the routine PA wrist best demonstrates the intercarpal joint spaces and wrist joint? a) PA projection b) tangential projection c) AP position d) None of the above
c) AP position
How much CR angle to the long axis of the hand is required for the carpal canal/tunnel view of the wrist a) 45º b) 35º c) 10º-15º d) 25º-30º
d) 25º-30º
A patient comes in for an elbow x-ray wearing a fiberglass cast. You notice from x rays taken before that a good technique for this patient was [email protected]. What is your new technique a) 60@ 4.4 b) 65@ 3.2 c) 63@ 4.4 d) 63@ 3.2
d) 63@ 3.2