CAMRT Radiography Practice Exam

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When performing an intercondylar fossa view, what part of the body should be perpendicular to the CR?

Long axis of the upper arm
Long axis of the lower leg (Tib/Fib)
Long axis of the femur
Long axis of the pelvis

The correct answer is: Long axis of the lower leg (Tib/Fib)

In the intercondylar fossa view, the correct positioning requires that the long axis of the lower leg, specifically the tibia and fibula, must be perpendicular to the central ray (CR). This positioning is crucial to accurately visualize the intercondylar fossa, which is located between the femoral condyles. When the lower leg is perpendicular to the CR, it ensures that the structures of interest—the intercondylar fossa and the femoral condyles—are optimally aligned within the image field. This alignment prevents image distortion and allows for clear visualization of any potential pathology within this area, such as fractures or joint abnormalities. Proper positioning in radiography is essential for obtaining diagnostic-quality images. In this case, if the long axis of the femur or any other body part were to be positioned perpendicular instead, it would not align the intercondylar fossa appropriately with the CR, leading to poor image quality or missed diagnoses.