Which projection would require a 45-degree medial rotation?

Which projection would require a 45-degree medial rotation?

• A. 30 degrees
• B. 60 degrees
• C. 15 degrees
• D. 45 degrees

Answer: (D)

Rotating the knee to 45 degrees medially targets the medial oblique knee projection. This oblique position tilts the knee so that the leg is turned toward the midline by about 45°, which reduces overlap between the femoral and tibial condyles and opens the joint space on the medial side. That specific angle is chosen to best visualize the medial aspects of the knee, including the medial femoral and tibial condyles, making it easier to assess the joint surfaces and surrounding structures. The other angles would produce less optimal separation or depict different oblique positions, so they don’t provide the same clear view of the medial knee anatomy.

Rotating the knee to 45 degrees medially targets the medial oblique knee projection. This oblique position tilts the knee so that the leg is turned toward the midline by about 45°, which reduces overlap between the femoral and tibial condyles and opens the joint space on the medial side. That specific angle is chosen to best visualize the medial aspects of the knee, including the medial femoral and tibial condyles, making it easier to assess the joint surfaces and surrounding structures. The other angles would produce less optimal separation or depict different oblique positions, so they don’t provide the same clear view of the medial knee anatomy.