Abstract
Abstract
Objective Full-form Magnetic Resonance Electrical Properties Tomography (MREPT) requires both
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magnitude and phase information. Since
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phase can be obtained faster and with higher SNR compared to
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magnitude, several phase-based methods have been developed for conductivity imaging. However, phase-based methods suffer from a concave bias due to the assumption that
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is negligible in the ROI. Approach In this paper, we re-derive the central equation of phase-based cr-MREPT without assuming that
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is negligible and thus propose a correction method directly integrated into the equation system. Main results Proposed method successfully corrects the concave bias on both simulated and experimental data and significantly increases image quality. Significance The proposed correction method depends on a very low-resolution
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map, and therefore the imaging time does not increase significantly for obtaining
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magnitude. Moreover, correction can be achieved using simulated
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magnitude, hence completely removing the additional imaging requirement.