What is the recommended central ray location for a lateral calcaneus radiograph?

The recommended central ray location for a lateral calcaneus radiograph is 1 inch distal to the medial malleolus. This positioning is crucial because it ensures that the central ray effectively captures the entire calcaneus (heel bone) and provides a clear view of its anatomical structure.

By centering 1 inch distal to the medial malleolus, you are aligning the x-ray beam properly to capture the critical areas of interest, including the subtalar joint and other joint spaces around the rear foot. This is particularly important for evaluating any potential fractures or abnormalities in the calcaneus.

In contrast, the other options either do not provide a suitable view of the calcaneus or miss important surrounding anatomical landmarks, which can lead to an incomplete assessment in clinical practice. Thus, centering 1 inch distal to the medial malleolus is the established standard for obtaining a quality lateral radiograph of the calcaneus.