Radiographic sections of the hindfoot were obtained using a computerized tomographic (CT) scanning unit. The standard examination consists of a series of coronal sections 4 mm thick at 4-mm intervals of the plantigrade foot, from the posterior talocalcaneal facet through the navicular. The coronal plane provides the best view of the facets of the talocalcaneal joint. Occasionally, the transverse plane is used to examine the talonavicular joint, calcaneocuboid joint, and talar neck. Minor modifications in the scanner help to produce optimal CT studies of the hindfoot.
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Smith et al. (1983) studied this question.