Which type of calibration is typically easier to detect any shifts or drifts?

• A. Standard Calibration
• B. Internal Calibration
• C. External Calibration
• D. Field Calibration

Answer: (C)

External calibration is typically easier to detect for any shifts or drifts because it involves the use of reference standards that are independent of the measurement system. This form of calibration often incorporates known values that can be compared against the measurements obtained during the bone densitometry tests. When deviations occur between the expected reference values and the measured values, it is relatively straightforward to detect discrepancies, thereby ensuring the accuracy and reliability of the densitometry results.

In contrast, internal calibration may rely on built-in standards or system components that might not always reflect external variations, making it less sensitive to drifts that may affect measurement accuracy. Similarly, field calibration and standard calibration might not consistently provide the same level of straightforward detection of shifts. External calibration's inherent design allows for external verification and re-evaluation, which is crucial in maintaining a precise and accurate measuring system.