What is the functionality called that adjusts radiation levels in modern fluoroscopy units?

The functionality that adjusts radiation levels in modern fluoroscopy units is known as automatic brightness control. This system is designed to optimize the image quality while minimizing the patient's exposure to radiation. By automatically adjusting the dose of radiation being emitted based on the specific requirements of the procedure or the characteristics of the area being imaged, automatic brightness control helps maintain consistent image quality throughout the examination.

This technology operates by evaluating the incoming image data and making real-time adjustments to the radiation output in order to achieve the desired brightness and contrast levels. This not only enhances the visibility of important anatomical details but also plays a crucial role in patient safety by ensuring that the least amount of radiation necessary is used.

In contrast, other options such as image flare, automatic adaption, and velling glare do not represent accurate or recognized functionalities related to the adjustment of radiation levels in fluoroscopy systems. Image flare typically refers to a specific artifact seen in imaging and does not relate to radiation adjustment. Automatic adaption is a vague term that does not specifically correlate with the equipment used in fluoroscopy. Velling glare is not associated with any known technology in this context and does not provide any relevant function within fluoroscopy.