A Radiograph of a PA Axial Projection for the Intercondylar

question 43

Multiple Choice

A radiograph of a PA axial projection for the intercondylar fossa (Camp-Coventry method) does not demonstrate the fossa well.It is foreshortened.The following positioning factors were used: patient prone, knee flexed 40° to 45°, CR angled to be perpendicular to the femur, 40-inch SID, and no rotation of the lower limb.Based on the factors used, what changes need to be made to produce a more diagnostic image?

• A)Increase SID to at least 48 inches (123 cm).
• B)CR must be perpendicular to lower leg.
• C)Rotate lower extremity 10° medially.
• D)Reduce flexion of the knee to 20° to 30°.

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Definitions:

Risky Shifts

Risky shift phenomenon observes that groups tend to make decisions that are riskier than the individual decisions of group members due to the diffusion of responsibility and group influence.

Unambiguous Decisions

Decisions that are clear and definite, leaving no doubt or room for multiple interpretations.

Reinforcement

A consequence that follows an action and increases the likelihood of that action being repeated in the future.

Conditioned Responses

Behavioral reactions that have been learned through repeated associations with a specific stimulus.