Abstract: Scan time in diffusion-relaxation magnetic resonance imaging (“MRI”) is reduced by implementing time-division multiplexing (TDM). In general, time-shifted radio frequency (“RF”) pulses are used to excite two or more imaging volumes. These RF pulses are applied to induce separate echoes for each slice. Diffusion MRI data can thus be acquired with different echo times, or alternatively with the same echo time, in significantly reduced overall scan time. Multidimensional correlations between diffusion and relaxation parameters can be estimated from the resulting data.

Abstract: A system for integrated electric field simulation and neuronavigation includes a neuronavigation system configured to track an electromagnetic coil used for neuromodulation of a brain of a subject and an electric field simulation neural network coupled to the neuronavigation system. The electric field simulation neural network is configured to generate a simulated electric field for a region of interest based at least on a coil position and orientation, a magnetic field profile of the electromagnetic coil, and multimodal neuroimaging data associated with the subject. The system further includes a display coupled to the electric field simulation neural network and configured to display the simulated electric field. The region of interest can be the brain of the subject and the electromagnetic coil can be a transcranial magnetic stimulation (TMS) coil.

Abstract: A system and method for producing high resolution diffusion information and imaging from a subject. In some aspects, the method includes receiving a plurality of low resolution diffusion images, each acquired with a different set of gradient directions and shifted in a slice direction, and generating a model correlating diffusion signals associated with the plurality of low resolution diffusion images and a high resolution diffusion image. The method also includes reconstructing the high resolution diffusion image by minimizing a cost function determined using the model. In some applications, the method further includes processing the high resolution diffusion image to generate a report providing diffusion information associated with the subject.

Abstract: A system and method for producing high resolution diffusion information and imaging from a subject. In some aspects, the method includes receiving a plurality of low resolution diffusion images, each acquired with a different set of gradient directions and shifted in a slice direction, and generating a model correlating diffusion signals associated with the plurality of low resolution diffusion images and a high resolution diffusion image. The method also includes reconstructing the high resolution diffusion image by minimizing a cost function determined using the model. In some applications, the method further includes processing the high resolution diffusion image to generate a report providing diffusion information associated with the subject.