The skyline (tangential or sunrise) view of the patella is an axial radiograph taken with the knee flexed to visualize the patellofemoral joint. It shows the patellar articular surface and trochlear groove, allowing assessment of alignment, subluxation, chondral wear, osteochondral fractures and joint-space narrowing. It’s useful for evaluating patellar tracking and fractures not seen on standard AP or lateral knee views.

A patella X-ray shows the kneecap’s bone structure and position relative to the femur, revealing fractures, dislocations or subluxation, osteochondral injuries, degenerative changes like arthritis, bone lesions or calcifications, and loose bodies. It also assesses joint space and patellar tracking; useful for pre- or post-operative evaluation and to guide further imaging such as MRI if soft-tissue or cartilage damage is suspected.

Seat or supine, with the knee flexed about 45°. Place the detector/cassette behind the knee at patella level. Direct the central ray tangential to the patella, angling roughly 10–20° depending on flexion, to project the patellofemoral joint. Collimate to the joint, have the patient hold still, and take the exposure. Repeat bilaterally for comparison if needed.

Skyline views (axial or "sunrise" views) are X‑ray projections that image the patella and patellofemoral joint tangentially. Taken with the knee flexed and the beam directed along the patellar surface, they better show the articular surface, alignment and small fractures. Clinically used to assess patellar fractures, subluxation/dislocation, chondral wear and patellofemoral joint‑space narrowing.

The best time to view a skyline is during golden hour—shortly after sunrise or before sunset—when warm light and long shadows enhance colors and textures. For dramatic city lights against a deep blue sky, visit during blue hour (20–40 minutes after sunset or before sunrise). Choose clear or low-haze conditions, check weather and air quality, and arrive early for unobstructed views.

Treatment begins with acute care (reduction, rest, ice, short immobilization) and conservative management—physiotherapy emphasizing quadriceps/VMO, hip/core strengthening, patellar taping or bracing, activity modification, NSAIDs and orthotics. Recurrent or severe cases may require surgery (MPFL reconstruction, tibial tubercle realignment, lateral release, cartilage repair). Management is individualized by instability severity, knee anatomy, and symptoms.