Which statement describes the purpose of the 30-degree medial rotation in the medial oblique projection?

Which statement describes the purpose of the 30-degree medial rotation in the medial oblique projection?

• A. Increase magnification
• B. Reduce superimposition of cuboid
• C. Widen the tarsal joints
• D. Visualize deltoid ligament

Answer: (B)

Rotating the foot medially about 30 degrees in this view is all about reducing bone overlap so you can see the cuboid and the adjacent tarsal joints more clearly. When the foot is turned inward, the cuboid moves out from under overlapping bones, so its outline and the joints around it—especially the calcaneocuboid and nearby articulations—become better defined. This makes it easier to assess for fractures or joint issues that might be hidden in a straight AP view. The goal isn’t to magnify the image or to widen joints, and the deltoid ligament isn’t directly visualized on a standard radiograph, so those aren’t the purposes of this projection.

Rotating the foot medially about 30 degrees in this view is all about reducing bone overlap so you can see the cuboid and the adjacent tarsal joints more clearly. When the foot is turned inward, the cuboid moves out from under overlapping bones, so its outline and the joints around it—especially the calcaneocuboid and nearby articulations—become better defined. This makes it easier to assess for fractures or joint issues that might be hidden in a straight AP view. The goal isn’t to magnify the image or to widen joints, and the deltoid ligament isn’t directly visualized on a standard radiograph, so those aren’t the purposes of this projection.