Which radiographic projection requires a 10-degree tube angulation toward the heel?

Which radiographic projection requires a 10-degree tube angulation toward the heel?

• A. Anteroposterior (AP) axial foot
• B. Lateral foot
• C. Medial oblique foot
• D. AP foot

Answer: (A)

An axial projection relies on tilting the x-ray beam along the long axis of the foot to reduce overlapping structures and open up the joints. For the AP axial foot, angling the tube about 10 degrees toward the heel directs the beam along that axis, which separates the metatarsals and clarifies the spaces between the tarsal and metatarsal joints. This subtle tilt enhances visibility of fractures or joint issues in the forefoot that might be hidden in a straight-on view. Other foot views—lateral, medial oblique, or a standard AP—are performed with the beam more perpendicular or with the foot rotated, and they do not use this heel-directed 10-degree angulation, so they don’t provide the same axial projection benefits.

An axial projection relies on tilting the x-ray beam along the long axis of the foot to reduce overlapping structures and open up the joints. For the AP axial foot, angling the tube about 10 degrees toward the heel directs the beam along that axis, which separates the metatarsals and clarifies the spaces between the tarsal and metatarsal joints. This subtle tilt enhances visibility of fractures or joint issues in the forefoot that might be hidden in a straight-on view. Other foot views—lateral, medial oblique, or a standard AP—are performed with the beam more perpendicular or with the foot rotated, and they do not use this heel-directed 10-degree angulation, so they don’t provide the same axial projection benefits.