Estimation of the measurement uncertainty in magnetic resonance velocimetry based on statistical models

• DOI: 10.1007/s00348-016-2163-3
• Publication Date: 2016-05-04T01:29:17Z
• Authors: Martin Bruschewski; Daniel Freudenhammer; Waltraud B. Buche...; Heinz-Peter Schiffer; Sven Grundmann
• Keywords: Velocimetry; Artifact (error)

Velocity measurements with magnetic resonance velocimetry offer outstanding possibilities for experimental fluid mechanics. The purpose of this study was to provide practical guidelines for the estimation of the measurement uncertainty in such experiments. Based on various test cases, it is shown that the uncertainty estimate can vary substantially depending on how the uncertainty is obtained. The conventional approach to estimate the uncertainty from the noise in the artifact-free background can lead to wrong results. A deviation of up to $$-75\,\%$$ is observed with the presented experiments. In addition, a similarly high deviation is demonstrated with the data from other studies. As a more accurate approach, the uncertainty is estimated directly from the image region with the flow sample. Two possible estimation methods are presented.