Which statement about exposure indicators in DR systems is most accurate?

• A. They indicate whether the exposure is within acceptable ranges and help optimize dose.
• B. They measure patient vital signs during imaging.
• C. They adjust the imaging modality automatically.
• D. They determine the patient's age.

Answer: (A)

Exposure indicators are readouts that tell you how much radiation actually exposed the detector and whether that exposure falls within an appropriate range. They are used to judge image quality and to optimize dose, guiding technologists to adjust technique to keep patient dose as low as reasonably achievable while still obtaining a diagnostic image. A properly exposed image should yield an indicator within the target range; values that are too high suggest overexposure (unnecessarily higher dose), while values that are too low indicate underexposure (potential noise and poor detail). These indicators are not measurements of patient vitals, nor do they automatically adjust the imaging modality during the exam, and they do not determine the patient’s age.