How does the Automatic Brightness Control (ABC) system adjust during a fluoroscopic procedure?

The Automatic Brightness Control (ABC) system functions by using the signal from the image receptor to maintain optimal image quality throughout a fluoroscopic procedure. As the conditions during the examination change—such as variations in patient thickness, positioning, or density—the ABC system detects these changes through the feedback from the image receptor.

Once it receives this information, it automatically adjusts the x-ray tube's output and exposure settings accordingly so that the brightness of the fluoroscopic image remains consistent. This automation allows for effective real-time adjustments without manual intervention, ensuring that the resulting images are of high quality for accurate diagnosis and monitoring.

This mechanism enhances both the safety and efficacy of the procedure by reducing the risk of under or overexposure for patients.