Overview
AP weightbearing knee radiographs evaluate joint space narrowing and alignment under physiologic load. The patient stands with equal weight on both legs and the detector centered to the knees. This view is important for osteoarthritis assessment and preoperative planning.
Technique
Position the patient standing with knees extended and center the detector to the joint line. Use consistent weightbearing technique and include both knees for comparison when indicated. Collimate to the knee and use appropriate exposure.
Clinical Indications
Weightbearing AP knee is indicated for osteoarthritis evaluation and symptomatic joint assessment. It reveals joint space narrowing and varus or valgus deformity under load. Non weightbearing views may underestimate degenerative change.
Image Assessment
Assess medial and lateral joint spaces alignment and presence of osteophytes. Evaluate subchondral sclerosis and cystic change. Report findings relevant to conservative or surgical management.