The irregular deviation index (DI) for a detector indicates a quality control issue related to which?

The irregular deviation index (DI) for a detector indicates a quality control issue related to which?

• A. Detector calibration
• B. Reader calibration
• C. Erasure thoroughness
• D. Plate uniformity

Answer: (A)

DI measures how actual receptor exposure compares with the target for each detector element. When the DI values are irregular across the detector, it shows the detector’s sensitivity is no longer matching its calibrated baseline. That points to a calibration issue at the detector itself, where gain or response across pixels has drifted or become inconsistent. Other factors like reader calibration (how the system reads the data), plate uniformity (the plate’s inherent spatial response), or erasure thoroughness (residual image) don’t produce irregular DI patterns tied specifically to the detector’s response. So the irregular DI for a detector best signals a detector calibration problem.

DI measures how actual receptor exposure compares with the target for each detector element. When the DI values are irregular across the detector, it shows the detector’s sensitivity is no longer matching its calibrated baseline. That points to a calibration issue at the detector itself, where gain or response across pixels has drifted or become inconsistent. Other factors like reader calibration (how the system reads the data), plate uniformity (the plate’s inherent spatial response), or erasure thoroughness (residual image) don’t produce irregular DI patterns tied specifically to the detector’s response. So the irregular DI for a detector best signals a detector calibration problem.