Radiologic Technologist Practice Exam

During fluoroscopy, which factor significantly improves image quality?

1. Using a higher kilovoltage peak (kVp)

2. Decreasing the exposure time

3. Employing automatic brightness control (ABC)

4. Utilizing a grid

The correct answer is: Employing automatic brightness control (ABC)

Employing automatic brightness control (ABC) significantly improves image quality during fluoroscopy because it helps maintain consistent brightness levels across different anatomical regions and varying patient conditions. ABC automatically adjusts the radiation exposure in real-time based on the density of the tissues being imaged and the specific requirements of the examination. This ensures that images remain clear and detailed, minimizing the risk of underexposure or overexposure, which can lead to poor image quality. In contrast, while using a higher kilovoltage peak (kVp) can enhance penetration and potentially improve image contrast, it does not dynamically adapt to the varying conditions that ABC handles. Decreasing the exposure time can reduce motion artifacts but may not directly enhance image quality if the exposure isn't adequate for the structures being examined. Utilizing a grid can help reduce scatter radiation and improve contrast but is less effective in ensuring optimal brightness across diverse imaging conditions compared to ABC. Thus, abc stands out as the most effective option for consistently enhancing image quality during fluoroscopy.