This process is associated with a displacement reaction mechanism and diffusion process that takes place during the molten salt treatment.
DW-MRI generates images that are sensitive to water displacement at the diffusion scale and quantifies such diffusion according to a quantitative index reflecting the apparent freedom of diffusion (apparent diffusion coefficient (ADC)).
These parameters include mean squared displacement (MSD), diffusion coefficient (D ), and radius of confinement (rconf).
Their trajectories were analyzed quantitatively to determine their mean square displacement (MSD), diffusion coefficient (D), confinement index (L), and confinement area L2 (see Materials and Methods).
PNF shows mixed or increased diffusion on ADC maps and diffusion tensor imaging with tractography reconstruction can accurately detect displacement, stretching or interruption of nerve fascicles.
These results confirm that the displacement reaction is diffusion controlled, and verify the magnitude of the diffusion coefficient.
They found that FA and mean diffusivity (MD), an index that reflects the average magnitude of molecular displacement by diffusion, were significantly increased in the biceps femoris muscle; also, MD was significantly increased in the semitendinosus and gracilis muscles two days after the marathon, while there were no changes on fat-suppressed T2-weighted sequences [31].
Even though such resolved data is often unavailable and one merely has an average parameter such as the mean-square displacement, the diffusion constant or the binding rate constant, one can still benefit from first passage abstractions [ 24, 25] or stochastic simulations portraying random diffusion and directed transport.
The motion is analyzed in terms of a mean-squared displacement, diffusion coefficient, and radius of gyration.
Over the same 52 s the rms displacement by diffusion is approximately 0.10 mm.
