3d subtalar joint visualization: utility of weightbearing computed tomography

Although weightbearing CT scans have become common for assessment of foot and ankle disorders, radiographs are still the standard for imaging the hindfoot. This study assessed the influence of various digitally reconstructed radiograph (DRR) projection views derived from weightbearing CT scans with different internal rotations of the foot and simulated downward tilt of X-ray equipment on the visualization of the subtalar joint. Understanding the radiographic appearance of the posterior facet is important to identify pathologic changes among diseased ankles.