How should the image receptor be positioned for a lateral projection of the tibia and fibula?

How should the image receptor be positioned for a lateral projection of the tibia and fibula?

• A. Parallel to the leg
• B. Diagonally
• C. Perpendicular to the table
• D. Under the knee only

Answer: (B)

For a lateral tibia‑fibula view, the image receptor is placed diagonally to align with the leg in its lateral position and to cover its full length from knee to ankle. This diagonal orientation helps ensure the entire tibia and fibula are within the image field and reduces the risk of clipping the ends, while keeping the joints included and the limb’s true shape represented with minimal distortion. Placing the receptor parallel to the leg can miss margins on a long limb or require cropping; placing it perpendicular to the table would misalign with the leg’s long axis in a lateral view; and putting it under the knee only would fail to image the entire leg. The diagonal setup gives the best coverage for the entire structure in this projection.

For a lateral tibia‑fibula view, the image receptor is placed diagonally to align with the leg in its lateral position and to cover its full length from knee to ankle. This diagonal orientation helps ensure the entire tibia and fibula are within the image field and reduces the risk of clipping the ends, while keeping the joints included and the limb’s true shape represented with minimal distortion. Placing the receptor parallel to the leg can miss margins on a long limb or require cropping; placing it perpendicular to the table would misalign with the leg’s long axis in a lateral view; and putting it under the knee only would fail to image the entire leg. The diagonal setup gives the best coverage for the entire structure in this projection.