Method and device for establishing excitation parameters for MR imaging

摘要

A method and a device for establishing excitation parameters, in particular for establishing an excitation profile, for MR imaging, are proposed. Elements of a k-space covariance matrix are determined for signal noise in k-space data which is captured using a plurality of receive channels in the context of data captured at an examination object. Elements of at least one image space covariance matrix are mathematically determined for a plurality of voxels of the examination object as a function of the k-space covariance matrix. The excitation parameters are established as a function of the determined elements of the at least one image space covariance matrix.

主权项

1. A method for establishing excitation parameters for a MR imaging captured by an MR device, comprising:
parallel exciting the MR device using a plurality of transmit channels of the MR device; parallel capturing image data of an examination object using a plurality of receive channels of the MR device; determining elements of a k-space covariance matrix for a signal noise of the captured image data in a k-space; mathematically determining elements of an image space covariance matrix for a plurality of voxels in a region of interest of the examination object as a function of the k-space covariance matrix; and establishing the excitation parameters as a function of the elements of the image space covariance matrix, wherein an excitation profile is determined by minimizing an evaluation function that is dependent on diagonal elements of the image space covariance matrix corresponding to the plurality of voxels in the region of interest.