What anatomic structures should be visible in a diagnostic lateral calcaneus radiograph?

In a diagnostic lateral radiograph of the calcaneus, the focus is on providing a comprehensive view of very specific anatomical structures. The correct answer highlights the importance of visualizing the entire calcaneus, which is the large bone at the back of the foot, along with the ankle joint and the adjacent tarsal bones. This comprehensive view is crucial for assessing not only the calcaneus itself but also its articulation with neighboring structures.

Including the ankle joint is vital for evaluating any potential fractures, dislocations, or alignment issues that may affect both the calcaneus and the ankle's mechanics. Similarly, the visibility of adjacent tarsals ensures that any conditions affecting the midfoot can be identified. Therefore, this selection correctly describes what a lateral view should capture for diagnostic purposes.

The other options do not encompass the essential structures needed for a thorough evaluation of the calcaneus and its surrounding anatomy, making them less suitable for a complete diagnostic radiograph.