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14 Cards in this Set
- Front
- Back
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State how to locate the knee joint for centering.
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flex the joint slightly, locate the apex of the patella, and as the patient extends the knee, center their about ½ inch below the patellar apex.
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State the importance of having the tube angled for both the AP and lateral projections.
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It prevents the joint space from being obscured by the magnified image of the medial femoral condyle.
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List the criteria for evaluating an AP knee radiograph.
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-Open femorotibial joint space
-Slight superimposition of the fibular head if the tibia is normal. |
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State the correct amount of flexion of the knees when doing a lateral projection
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20-30 degrees
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State the correct amount of flexion of the knees when doing a lateral projection for a new or unhealed patellar fracture.
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No more than 10 degrees
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State how you would find the knee joint for a lateral projection.
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Grasp the epicondyles and adjust the m so they are perpendicular to the IR.
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Describe how you can tell a true lateral knee on a radiograph.
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Femoral condyles superimposed
Open patellofemoral joint space |
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Explain why a standing AP projection of the knees would be of value.
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It reveals the narrowing of a joint space that appears normal on the non-weight bearing study.
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Describe the oblique projections of the knee that demonstrate the proximal tibiofibular articulation.
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AP and PA medial oblique
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Describe the two PA axial projections for the intercondylar fossa.
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Hombland method
-camp-coventry method. |
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Describe the AP axial projection to demonstrate the intercondylar fossa.
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Beclere method
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List the methods that demonstrate the intercondylar fossa.
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-Hombland
-Camp-Coventry -Beclere |
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Describe the tangential projections that will place the patella in profile and open the patellofemoral articulation.
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Hughston method, Merchant method, Settegast method
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16) Name the projection of the patella that should not be attempted until a transverse fracture has been ruled out with a lateral projection.
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Tangential projection (Sattegast method)
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