Multidimensional Imaging Using Combined Stray Field and Pulsed Gradients

Paramagnetic relaxation in sandstones: Distinguishing T1 and T2 dependence on surface relaxation, internal gradients and dependence on echo spacing

“…For example, field gradients of the order of 10-100 T/m are applied in Stray Field Imaging for high resolution of systems with broad line widths [1][2][3][4]. Functional MRI utilizes the inhomogeneous field induced by paramagnetic contrast agents for increasing sensitivity and specificity [5,6].…”

Multi-dimensional magnetic resonance imaging in a stray magnetic field

“…Since the gradient of the fixed B 0 field is used, imaging information can only be collected along the fixed axis of the stray field (say z). It was already proposed to use additional pulsed field gradients in the other two dimensions and have thus a mixed resolution experiment, high in the z-direction, and low along the x-and y-axis [9]. It would however be better to use the fixed stray field gradient to image all three dimensions.…”

Quantitative density profiling with pure phase encoding and a dedicated 1D gradient

“…The STRAFI [2][3][4][5] technique offers high resolution but the signal suffers heavily from relaxation time weighting, making it difficult to quantify true proton density. STRAFI employs the strong, time invariant magnetic field gradient in the periphery of permanent or superconducting magnets.…”