Overdiscrete echo-planar spectroscopic imaging with correlated higher-order phase correction.

Purpose: To introduce a robust methodology for fast H MRSI of the brain at 3T with improved SNR and reduced phase-related artifacts.

Method: An accelerated acquisition scheme using echo-planar spectroscopic imaging (EPSI) was combined with the overdiscrete reconstruction framework. This approach enables the interleaved acquisition of a water reference scan at each phase encoding step, maximizing its correlation with the water-suppressed measurement.

Convection-reaction equation based magnetic resonance electrical properties tomography (cr-MREPT).

Images of electrical conductivity and permittivity of tissues may be used for diagnostic purposes as well as for estimating local specific absorption rate distributions. Magnetic resonance electrical properties tomography (MREPT) aims at noninvasively obtaining conductivity and permittivity images at radio-frequency frequencies of magnetic resonance imaging systems. MREPT algorithms are based on measuring the B1 field which is perturbed by the electrical properties of the imaged object.