A knee lateral view X-ray is a side‑view radiograph of the knee that visualizes the femur, tibia, patella and joint space. It helps detect fractures, dislocations, loose bodies, joint effusion and degenerative changes. The image is taken with the knee slightly flexed to show bone alignment and patellar position. It’s commonly used to evaluate acute injury, persistent pain or suspected arthritis.

Place the patient in a lateral recumbent position with the affected knee closest to the detector. Flex the knee about 20–30° to superimpose the femoral condyles and position the patella perpendicular to the cassette. Center the beam at the knee joint/medial femoral epicondyle, perpendicular to the film. Include distal femur, proximal tibia/fibula and patella; immobilize and collimate appropriately.

A skyline (sunrise or axial) knee X-ray is a tangential view of the patella and patellofemoral joint taken with the knee flexed so the X‑ray beam projects along the patella’s surface. It highlights patellar fractures, subluxation or dislocation, articular surface alignment, and joint‑space changes often missed on AP/lateral views. It’s useful for suspected patellar injury or anterior knee pain but gives limited detail of the femur and tibia.

A four‑view knee X‑ray is a set of four radiographic images—anteroposterior (AP), lateral, skyline (patellar/sunrise) and a weight‑bearing/Rosenberg view—taken to assess bone alignment, joint space, fractures, patellar tracking, effusion and early osteoarthritis. Combining these views improves detection of fractures, cartilage narrowing and patellofemoral problems and is commonly used for trauma, persistent knee pain and arthritis evaluation.

Yes. A lateral knee X‑ray can show osteoarthritic changes such as joint‑space narrowing, osteophytes, subchondral sclerosis and cysts, and helps assess the patellofemoral compartment. It’s usually used with AP and skyline views for full evaluation. X‑rays are less sensitive for early or inflammatory arthritis and for soft‑tissue or cartilage damage, where MRI or ultrasound may be needed.

A lateral knee problem refers to pain or dysfunction on the outer side of the knee caused by conditions such as iliotibial band syndrome, lateral meniscus tears, ligament sprains, bursitis, or lateral compartment osteoarthritis. Symptoms include outer-knee pain, swelling, clicking, instability and difficulty with weight-bearing. Diagnosis uses clinical exam and imaging; treatment ranges from rest, physiotherapy and anti-inflammatory medication to injections or surgery for severe cases.