Question
Which of the following projections of the ankle would best demonstrate the mortise
| A. |
Medial oblique 15 to 20 degrees |
| B. |
Lateral oblique 15 to 20 degrees |
| C. |
Medial oblique 45 degrees |
| D. |
Lateral oblique 45 degrees |
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Correct Answer � A Explanation |
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Answer (A)
The 15-degree medial oblique projection is used to demonstrate the ankle mortise (joint). Although the joint is well demonstrated in the 15-degree medial oblique projection, there is some superimposition of the distal tibia and fibula, and greater obliquity is required to separate the bones.
To best demonstrate the distal tibiofibular articulation, a 45-degree medial oblique projection of the ankle is required.