Difference between revisions of "Knee - Rosenbergs"
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Latest revision as of 17:02, 11 November 2020
Radiographic Positioning
Adult | Other related pages of interest |
Name of projection | Knee - PA Weightbearing (Rosenbergs) |
Area Covered | Distal femur, proximal tibia and fibula, bilateral tibiofemoral joint spaces under the effects of gravity |
Pathology shown | Joint space narrowing due to cartilage degeneration or other knee joint pathologies |
Radiographic Anatomy | Knee Radiographic Anatomy |
IR Size & Orientation | 35 x 43cm Landscape |
Film / Screen Combination | Regular (CR and DR as recommended by manufacturer) |
Bucky / Grid | Moving or stationary grid |
Filter | No |
Exposure | 66 kVp 12 mAs |
FFD / SID | 100cm |
Central Ray | CR perpendicular to IR Directed to a midpoint between the knee joints at a level of the patella apices |
Collimation | Collimate to bilateral knee joint region include distal femur and proximal tibia / fibula to see alignment of joints |
Markers | Distal and Lateral Marker orientation PA |
Shielding | Gonadal (check your department's policy guidelines) |
Respiration | Not applicable |
Positioning |
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Critique | Positioning |
Special Notes | The maximum stresses in the knee joint occur between 30° and 60° of flexion; therefore, standard anteroposterior (AP) weight-bearing radiographs on extension are not ideal for evaluation of cartilage loss as indicated by joint space narrowing. The Rosenberg view was created to address this issue. The Rosenberg view is a 45-degree flexion, posteroanterior, weight-bearing view of the knee with the patellae touching the image receptor. The Rosenberg view is more sensitive and specific for joint space narrowing than the conventional extension weight-bearing anteroposterior views, and is useful for the assessment of knees with early degenerative change. |