When a properly calibrated automatic exposure control (AEC)is not employed to obtain a uniform selection of technical x-ray exposure factors,well-managed imaging departments

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Well-managed imaging departments should have standardized technique charts established for each X-ray unit in their facility. This helps ensure a consistent selection of technical exposure factors and reduces the risk of over- or underexposure. Using technique charts borrowed from another facility or estimating exposure factors for each examination are not optimal solutions as they may result in inconsistent image quality and unnecessary repeat imaging. Having the radiologist determine and set up exposure factor charts may be feasible for smaller facilities, but may not be practical for larger departments with multiple X-ray units and a high volume of patients.

When a Properly Calibrated Automatic Exposure Control (AEC)is Not Employed