Vessel encoded arterial spin labeling using fourier encoding suitable for vascular territory mapping

摘要

Methods, systems, computer programs, circuits and workstations are configured to generate at least one two-dimensional color blood flow map that combines X and Y encoded primary and secondary peak data of 1-dimensional Inverse Fourier Transform images to visually indicate (i) anterior/posterior and right/left directional components of respective feeding arteries using defined colors and (ii) brightness to indicate an amount of blood flow associated with each voxel, with increased brightness associated with increased blood flow.

主权项

1. A method of mapping brain vascular perfusion using MRI comprising:
acquiring a set of multiple pseudo-continuous arterial spin label (PCASL) images with varying phase offsets, acquiring a set of pseudo-continuous arterial spin label (PCASL) images with X directional encoding; acquiring a set of PCASL images with Y directional encoding; electronically generating complex signals per voxel; then electronically applying a one-dimensional inverse Fourier transform (IFT) per voxel of the X and Y encoded images; then electronically evaluating each voxel of the X and Y encoded images using the applied one-dimensional IFT to determine X, Y locations of primary and secondary voxel intensity peaks to localize feeding arteries, wherein the primary voxel intensity peak is a highest voxel intensity and the secondary voxel intensity peak is a second highest voxel intensity; and generating at least one two-dimensional color blood flow map that combines X and Y encoded primary and secondary peak data to visually indicate anterior/posterior and right/left directional components of respective feeding arteries using defined colors, the map further configured to visually indicate an amount of blood flow associated with each voxel using brightness of intensity, with increased brightness associated with increased blood flow.