RECOVERY OF MISSING INFORMATION IN DIFFUSION MAGNETIC RESONANCE IMAGING DATA

摘要

There is described herein a method for recovering missing information in diffusion magnetic resonance imaging (dMRI) data. The data are modeled according to the theory of moving frames and regions where frame information is missing are reconstructed by performing diffusions into the regions. Local orthogonal frames computed along the boundary of the regions are rotated into the regions. Connection parameters are estimated at each new data point obtained by a preceding rotation, for application to a subsequent rotation.

主权项

1. A method for recovering missing information in diffusion magnetic resonance imaging (dMRI) data, the method comprising:
fitting, at each data point of the dMRI data, a local orthogonal frame expressed as (i, j, k) to represent three directions; determining connection parameters cijk at each data point to represent a rotation of the local orthogonal frame in a spatial neighborhood of the data point in accordance with the dMRI data; and performing inward diffusions into a region where frame information is missing by:
rotating the local orthogonal frame in a heading direction at data points starting along a boundary of the region and moving into the region; andestimating connection parameters cijk at each new data point obtained by a preceding rotation of the local orthogonal frame, for application to a subsequent rotation of the local orthogonal frame at the new data point.