What are right-angle images?

• A. A panoramic and a bitewing combined
• B. Images taken at 45° to each other
• C. A single image captured with 90° orientation
• D. Two projection images taken at right angles to each other

Answer: (D)

Right-angle images come from using two projections that are perpendicular to each other. By taking one radiograph from a given direction and a second from a direction 90 degrees apart, you create two different views of the same object. The way the object's image shifts between those perpendicular views (parallax) lets you determine its depth and exact position in three dimensions, such as whether something is toward the cheek or tongue side.

So the best match is two projection images taken at right angles to each other. The other options describe single views, non-perpendicular angles, or combinations that don’t provide the needed two-orthogonal perspectives for localization.