How do exposure indicators help in DR systems?

• A. They indicate whether the exposure is within acceptable ranges and help optimize dose.
• B. They measure patient heart rate.
• C. They track exam scheduling.
• D. They replace technique charts.

Answer: (A)

Exposure indicators in digital radiography quantify the amount of radiation reaching the detector and relate it to an expected target value. This quick feedback shows whether the exposure was made within the acceptable range for diagnostic quality and patient safety. When the indicator falls within the supported range, image quality is typically adequate without excess dose. If the indicator is too high, you know the patient received more radiation than needed and you should reduce technique; if it’s too low, you may need to increase technique to ensure diagnostic quality. Using these indicators helps standardize results, support dose optimization (ALARA), and improve consistency across exams and devices. They don’t measure heart rate, track scheduling, or replace technique charts—the charts guide the starting exposure, and the indicators provide feedback to fine-tune future exposures.