Measurement of the Diffusion Property of Water Molecules Based on Magnetic Resonance Diffusion Weighted Spectroscopy / 航天医学与医学工程

0.05).Conclusion It is feasible to implement the DWS pulse sequence in conventional MR system to investigate the diffusion property of water molecule,furthermore the results are not dependent on diffusion weighting.

Experimental Study on Dependence of Diffusion Tensor-derived Parameters upon Diffusion Time / 航天医学与医学工程

Objective To investigate the relationship between diffusion time and diffusion tensor-derived parameters. Method Diffusion tensor data sets were obtained from 11 healthy volunteers using 8 different levels of diffusion time while keeping the diffusion sensitive gradient magnetic field strength fixed. Diffusion tensor-derived parameters with variant diffusion time for six regions of interest were calculated and compared. Result There was statistically significant difference in mean diffusivity (MD) of variant diffusion time (P0.05). Conclusion There is no diffusion time dependent in FA, but MD are diffusion time dependent. The reason may be attributed to the difference of the diffusion properties between the intra- and extra-cellular water molecules.