An AP clavicle projection with accurate positioning demonstrates

1. the medial clavicular end next to the lateral edge of the vertebral column.
2. the superior scapular angle superior to the clavicle.
3. inferosuperior foreshortening on the kyphotic patient unless the central ray is angled cephali-cally.
4. an overexposed medial clavicle unless a compensating filter is used.
a. 2 only
b. 1 and 3 only
c. 1, 3, and 4 only
d. 1, 2, and 3 only

B