Local TX and RX Shimming for Improved Conductivity Imaging
Jakob Meineke 1 and Ulrich Katscher 1
Philips Research Europe, Hamburg, Germany
Phase-based Electric Properties Tomography (EPT) can be
used to measure the conductivity of tissue in vivo.
However, the method is limited by the assumption that
both receive (RX) and transmit (TX) radiofrequency
fields are spatially homogenous. Here, it is shown that
the systematic errors of phase-based EPT can be reduced
by using a local, offline shimming procedure. It
utilizes B1-mapping and the additional degrees of
freedom present in multi-TX/RX systems. A primary goal
of the technique is to improve conductivity imaging of
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