What is the primary purpose of using an Auto Exposure Control (AEC) system in radiography?

• A. To Replace the Need for Positioning Adjustments
• B. To Automatically Insert Images Into the System
• C. To Ensure Consistent Image Quality With Optimal Exposure
• D. To Increase Patient Dose for Better Images

Answer: (C)

Auto Exposure Control focuses on standardizing the amount of radiation that reaches the image receptor so the resulting image has consistent brightness and diagnostic quality. It uses detectors under the patient to sense when the receptor has received the preset level of exposure and then automatically stops the X-ray exposure. This automatic termination helps compensate for differences in patient size, tissue density, and positioning, reducing variability and the need for repeats while keeping exposure as low as reasonably achievable. It’s important to remember that AEC supports, but does not replace, proper positioning and technique, and safety features like back-up timers are still part of good practice.