Laboratory test results are used to inform decisions on the diagnosis and treatment of disease. Consistent and comparable results from different measurement procedures are important for developing clinical practice guidelines and for those guidelines to be applied to decisions about patient care. ISO document 17511:2003 (In vitro diagnostic medical devices -Measurement of quantities in biologic...

In addition to reference measurement procedures and reference materials, reference or calibration laboratories play an integral role in the implementation of measurement traceability in routine laboratories. They provide results of measurements using higher-order methods, e.g. isotope dilution mass spectrometry and may assign values to materials to be used for external quality assessment progra...

Recently at National Institute of Metrological Research (INRIM) a Hamon actively guarded 10×100 MΩ was developed to improve the traceability levels at 1 GΩ level. Utilizing and revisiting this project, a Hamon 10×10 GΩ network is now under realization to extend the capabilities of the Hamon method up to 100 GΩ. Moreover, by means of this Hamon network, it will be possible to extend the capabili...

Long synonymous with medical imaging, x-ray computed tomography (CT) is proving its worth in industrial applications such as material characterization, defect analysis, and dimensional inspection e.g. of manufactured components. Since 2005, when the first purpose-built CT instrument was made commercially available, there have been significant efforts to understand just how reliable measurements...

A new measurement set-up for calibration of secondary DC voltage standards at the level of 1.018 V has been developed by the Bureau International des Poids et Mesures (BIPM). A metrological validation process was developed to ensure the correct operation of the new set-up and to demonstrate its consistency with the previous set-up. Firstly, a direct comparison of two primary voltage standards s...