CAMRT Radiography Practice Exam

Why are weights used during AC joint examinations?

1. To increase clarity of the image

2. To show if separation is occurring

3. To stabilize the joint

4. To reduce the exposure time

The correct answer is: To show if separation is occurring

Weights are used during AC joint examinations primarily to show if separation is occurring in the acromioclavicular joint. When weights are applied, they increase tensile stress on the joint, making any discrepancies in joint space more apparent. This helps radiologists to assess the integrity of the ligaments surrounding the joint and to identify conditions such as AC joint separation or instability. Observing the position of the clavicle relative to the acromion with and without weights provides valuable diagnostic information regarding potential injuries or disorders. Other options, while they may seem plausible at first glance, do not align with the primary purpose of weight use in these examinations. Using weights does not significantly enhance image clarity on its own, nor is it intended to stabilize the joint during the imaging process. Additionally, the exposure time does not directly correlate with the use of weights but rather depends on factors such as the imaging technique and equipment settings.