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Abstract #3777

Uncertainty assessment under repeatability conditions in Helmholtz-based electric properties tomography

Alessandro Arduino1, Francesca Pennecchi1, Ulrich Katscher2, Luca Zilberti1, and Maurice Cox3
1Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, Italy, 2Philips Research Laboratories, Hamburg, Germany, 3National Physical Laboratory (NPL), Teddington, United Kingdom

This work shows the uncertainty evaluation under repeatability conditions of the phase-based Helmholtz-electric properties tomography (EPT) technique. Repeated MRI scans of a homogeneous cylindrical phantom are analyzed with appropriate statistical techniques to evaluate the covariance matrix of the EPT input. This matrix is propagated through the EPT technique according to the law of propagation of uncertainty. The estimated electric conductivity is highly repeatable and exhibits a spatial dispersion, whose average value, within a central region, gives an accurate estimate of the phantom conductivity. The described approach will be applied in future to extend the characterization under reproducibility conditions.

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