Overview
The lateral knee radiograph profiles the femorotibial joint patella and soft tissues to assess effusion and fractures. The knee is flexed approximately 20 to 30 degrees for optimal visualization. This view is essential for trauma and preoperative evaluation.
Technique
Position the patient in true lateral with femoral condyles superimposed and the knee flexed. Center the detector to the joint and include the distal femur and proximal tibia. Use appropriate exposure and immobilize the limb.
Clinical Indications
Lateral knee is indicated for trauma suspected patellar fracture and evaluation of joint effusion. It complements AP and skyline views for comprehensive assessment. MRI is used for soft tissue evaluation when indicated.
Image Assessment
Evaluate patellar position and trochlear groove alignment and inspect for cortical disruption. Assess joint effusion and soft tissue swelling. Document findings relevant to orthopedic management.