How is intervoxel phase dephasing reduced in MRI?

Intervoxel phase dephasing in MRI is primarily reduced through the application of Gradient Moment Nulling. This technique addresses the dephasing that can occur due to magnetic field inhomogeneities and flow artifacts during imaging. By controlling the gradients applied during the imaging process, Gradient Moment Nulling helps to maintain phase coherence among spins within the same voxel, effectively minimizing the differences in magnetic field experienced by adjacent voxels over time.

This is crucial in high-resolution imaging, where the goal is to ensure that the signals from adjacent voxels remain correlated, thereby improving image quality and reducing artifacts. The application of this method involves designing specific pulse sequences that counteract the effects of magnetic field gradients, leading to clearer and more accurate representations of the imaged tissues.