Method to Reduce the Bias in the Mean and Variance of Indices of Water Diffusion Anisotropy as Measured by Diffusion Tensor MRI
This invention describes several novel MRI "stains" to measure and display water diffusion anisotropy data obtained by diffusion tensor MRI (DT-MRI). One problem that this invention overcomes is that it significantly reduces the statistical bias in the mean and variance of the measured anisotropy of water diffusion caused by background noise in the MR images. These benefits are achieved by exploiting the idea that fiber tracts exhibiting diffusion anisotropy vary continuously in most regions.