Investigating Variable Density Sampling Patterns in Spiral Trajectories for use in MREPT

Magnetic Resonance Electrical Properties Tomography (MREPT) is used for obtaining conductivity by utilizing B1 phase images. In order to obtain B1 phase, different pulse sequences can be used. Among these, spiral trajectory based imaging has various advantages including high SNR efficiency and acquisition speed and was demonstrated in MREPT previously. In this work, to further improve spiral trajectory based imaging in MREPT, we investigate variable density sampling patterns. In vivo brain results indicate that conductivity images are quite robust with the choice of undersampling pattern and whole brain coverage can be completed under a minute with multiple averages.