What type of calibration is specifically used with Hologic machines?

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

Answer: (C)

Hologic machines utilize internal calibration, which involves the integration of calibration processes within the device itself. This method is designed to ensure that the measurements obtained are accurate and reliable by using pre-installed artifacts within the system. Internal calibration allows the machine to continually assess and adjust its performance without the need for external reference sources, which can be subject to variability.

By performing frequent internal calibrations, Hologic systems can ensure that their bone density measurements remain consistent over time, taking into account any potential drift or changes in the system that may occur due to wear or environmental factors. This type of calibration is particularly important in maintaining the precision and accuracy necessary for reliable diagnostic practices in bone densitometry.