If two radiographers produce exposures with different kVp and mAs but similar dose indicators and patient dose, this demonstrates which concept?

• A. Spatial resolution
• B. Dynamic range
• C. Automatic exposure control (AEC)
• D. Exposure latitude

Answer: (D)

Exposure latitude describes how much exposure factors can vary and still produce a diagnostically acceptable image without exceeding patient dose limits. If two radiographers use different kVp and mAs but arrive at similar dose indicators and patient dose, it shows the imaging system can tolerate a range of technique combinations and still deliver appropriate receptor exposure. Digital radiography has a relatively wide exposure latitude, so adjusting kVp and mAs can compensate to keep the image within clinically acceptable brightness and contrast while keeping dose similar. This isn’t about sharpness (spatial resolution), nor about the detector’s overall brightness range (dynamic range), and while automatic exposure control can guide exposures, the scenario highlights the tolerance of exposure factors within the system.