What is the purpose of calibration in AEC systems regarding baseline density?

• A. To ensure patient positioning is optimized.
• B. To ensure consistent exposure results when detectors are in place.
• C. To allow unlimited exposure regardless of detector position.
• D. To eliminate the need for shielding.

Answer: (B)

Calibration of automatic exposure control establishes a reference density that the system aims for during an exposure. The detectors in the patient path provide feedback, and the AEC stops the exposure when the signal reaches the preset density. By setting this baseline, the system produces consistent image density across exams even when detectors are repositioned or added. While patient positioning and technique influence results, calibration ensures the density outcome is predictable rather than varying with detector placement. This process doesn’t directly address positioning optimization, nor does it permit unlimited exposure or remove shielding.