Abstract
The absence of soft tissue superimposition on bone makes CT greatly superior to conventional radiographs, even using special views, for demonstrating the hind foot. Views derived from both methods are compared. Semicoronary and transverse planes have been defined in relation to specific points in the tarsus. In the semicoronary plane, the calcaneus-valgus angle varies from +10 degrees (valgus) to -10 degrees (varus) and the sustentaculum angle varies from 18 to 28 degrees. In the transverse plane, the plantar talocalcaneal angle is 60 degrees to 70 degrees and the calcaneal-cuboidal angle is 20 degrees to 35 degrees. These values are based on measurements of 62 normal feet. They are valuable for judging quantitatively posttraumatic deformities, displacement of fragments and operative results.
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