Final answer:
The control that adjusts radiation levels for different body parts during fluoroscopy is called Automatic Brightness Control (ABC), essential for image quality and radiation safety.
Step-by-step explanation:
The control that automatically changes radiation levels for thicker or thinner body parts during fluoroscopy is termed Automatic Brightness Control (ABC).
This advanced capability allows for real-time adjustment of radiation to ensure that the image quality is maintained regardless of the variable density of the tissues being imaged. Modern radiology equipment uses ABC to optimize the image brightness by varying the exposure factors such as mA (milliampere), kVp (kilovolt peak), and sometimes the filtration. The technology is essential in maintaining consistent image quality while minimizing patient exposure to radiation.