The Rosenberg view is a weight-bearing posteroanterior knee radiograph taken with the patient standing and both knees flexed about 45° (often with slight caudal x‑ray angulation). It accentuates femorotibial joint-space narrowing, especially in the posterior compartments, improving detection and grading of osteoarthritis compared with standard extended views. It’s used when symptoms suggest disease despite normal AP films.

Visit Rosenberg View early morning (around sunrise) or late afternoon (golden hour) for cooler temperatures, clearer views, and softer light. Avoid midday when UV and heat peak; check local air‑quality and pollen forecasts and pick a low‑pollution day if you have respiratory allergies. Choose weekdays to avoid crowds, bring water, sun protection, and layered clothing for changing conditions.

Rosenberg and tunnel views are different knee radiographic projections. The Rosenberg view is a weight‑bearing PA film with the knees flexed about 45°, used to detect joint‑space narrowing in osteoarthritis. The tunnel view (intercondylar notch or axial projection) visualizes the intercondylar fossa and tibial plateau, useful for loose bodies, osteochondral lesions, or fracture assessment.

A standard knee X‑ray includes three views: anteroposterior (AP) — frontal view assessing joint space, alignment, osteoarthritis and fractures; lateral — side view showing patella, femoral condyles, and effusion; and axial/sunrise (skyline) — tangential view of the patella and patellofemoral joint to detect dislocation, cartilage loss or subtle fractures. Sometimes a weight-bearing AP is used.

The best X‑ray view to assess knee osteoarthritis is a weight‑bearing (standing) posteroanterior view — particularly the Rosenberg view (PA with 45° flexion). These demonstrate joint‑space narrowing and compartmental collapse more reliably than non‑weight‑bearing films. Lateral and skyline (axial patellar) views are useful adjuncts to evaluate osteophytes, subchondral changes, and patellofemoral disease.

There isn’t one fixed number—radiography uses dozens of different views. Core projections include AP (anteroposterior), PA (posteroanterior), lateral and oblique, plus axial and specialized positions such as decubitus, sunrise/skyline and lordotic. Many additional named projections exist for chest, spine, skull, dental and joints, so the total types vary by clinical indication and exceed several dozen.