The AP (anteroposterior) view of the knee is a standard X‑ray projection with the beam entering the front and exiting the back of the knee. The patient is supine or standing with the knee extended and slight internal rotation (about 5–10°) to align femoral condyles. It shows the distal femur, proximal tibia and joint space for fractures, alignment, osteoarthritis, and joint‑space evaluation; weight‑bearing AP helps assess OA.

Cost of a knee AP (anteroposterior) X‑ray varies by country and facility. Typical ranges: India ₹100–₹800; UK—free on the NHS or about £25–£100 privately; US about $50–$400 at urgent‑care or private clinics (hospital charges may be higher). Final cost depends on location, number of views and whether a radiologist’s report is included. Ask the facility or insurer for exact pricing.

A bilateral knee X-ray is a plain radiograph of both knees taken during the same exam, usually with weight-bearing anteroposterior and lateral views. It evaluates bones, joint spaces, cartilage loss, fractures, alignment and degenerative changes, allowing side-to-side comparison. The test is quick, noninvasive, performed in radiology, involves minimal radiation and may require removing jewelry or clothing over the knees.

There’s no single best view; the standard knee X‑ray series includes a weight‑bearing anteroposterior (AP) view, a lateral view and a skyline (sunrise/axial) view of the patella. Weight‑bearing AP is preferred for assessing joint space and osteoarthritis, lateral is best for effusion and fractures, and skyline evaluates the patellofemoral joint.

A 3‑view knee X‑ray obtains three standard images—anteroposterior (AP), lateral, and a skyline (patellar/tangential) or weight‑bearing view—to evaluate bone alignment, joint spaces, fractures, arthritis, and effusion. It helps detect dislocations, osteochondral injuries and degenerative change. No special preparation beyond removing metal is usually needed; some protocols include a standing AP to assess joint narrowing under load.

Apophysitis is a common adolescent knee condition caused by repetitive stress at a bone’s growth plate (apophysis), often affecting the tibial tubercle (Osgood–Schlatter) or inferior patella (Sinding‑Larsen‑Johansson). It causes activity-related anterior knee pain, swelling, and tenderness at the tendon attachment. Treatment is conservative: rest or activity modification, ice, NSAIDs, stretching and strengthening; symptoms usually resolve with skeletal maturity.