A PA wrist projection obtained with the hand flexed and the metacarpals at a 45-degree angle with the IR demonstrates
1. a closed radioulnar articulation.
2. foreshortened metacarpals.
3. a decrease in scaphoid foreshortening.
4. closed second through fifth carpometacarpal joint spaces.
a. 1 and 3 only
b. 1, 2, and 4 only
c. 2, 3, and 4 only
d. 1, 2, 3, and 4 only
Question 2
A PA wrist projection with accurate positioning demonstrates
1. an open radioulnar articulation.
2. the radial styloid in profile.
3. the long axes of the third metacarpal aligned with the midforearm.
4. open second through fifth MC joint spaces.
a. 1 and 2 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 1, 2, 3, and 4
