Lange Radiography Practice Test 2026 - Free Radiography Practice Questions and Study Guide

In the plantodorsal axial projection of the calcaneus, the relationship between the plantar surface of the foot and the image receptor (IR) is perpendicular. This positioning is essential for obtaining a clear and accurate image of the calcaneus, which is the heel bone. By ensuring that the plantar surface is perpendicular to the IR, the radiograph can accurately depict the anatomy of the calcaneus without distortion or misrepresentation of its structures.

In this view, the foot is often positioned so that the long axis of the calcaneus aligns properly with the central ray that enters the heel and exits through the forefoot. This technique allows for optimal visualization of the calcaneus's profile, including its subtalar joint relationships. A perpendicular alignment confers clarity and detail in imaging, essential for diagnostic purposes, aiding in identifying any conditions affecting the calcaneus.