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Knee - Horizontal Ray Lateral
Radiographic Positioning
| Adult | Other related pages of interest |
| Name of projection | Knee - Lateral - Horizontal Ray (Trauma) |
| Area Covered | Distal femur, proximal tibia & fibula, patella, and knee joint. |
| Pathology shown | Any fractures, fluid/fat levels (lipohaemarthrosis), soft tissue abnormalities see snow globe effect and lateral knee radiography |
| Radiographic Anatomy | Knee Radiographic Anatomy |
| IR Size & Orientation | 24 x 30cm Landscape |
| Film / Screen Combination | Detail (CR and DR as recommended by manufacturer) |
| Bucky / Grid | No |
| Filter | No |
| Exposure | 60 kVp 8 mAs |
| FFD / SID | 100cm |
| Central Ray | CR directed horizontally 2.5cm distal to apex of patella |
| Collimation | Collimate on the sides to the skin margins Include maximum amount of femur and tibia / fibula |
| Markers | Distal and Anterior Marker orientation AP |
| Shielding | Gonadal (check your department's policy guidelines) |
| Respiration | Not applicable |
| Positioning |
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| Critique | Positioning |
| Special Notes | A horizontal beam true lateral of the knee without knee flexion demonstrates subpatella bursa and associated fat pads for possible displacement or presence of a fluid level. Effusion is well visualised because of the horizontal ray. Effusion within the articular cavity of the knee is a strong indicator of knee joint pathology. This is also a good projection for possible fracture or dislocation of patella |
AndyC |
Latest page update: made by AndyC
, Jun 18 2011, 3:26 PM EDT
(about this update
About This Update
Edited by AndyC
7 words added view changes - complete history) |
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Keyword tags:
knee
knee lateral
knee positioning
knee technique
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