Method to generate magnetic resonance exposures

摘要

In a method described for generating magnetic resonance exposures in which diffusion-coded raw data are acquired with of a diffusion gradient measurement sequence having a number of partial diffusion gradient sequences, at least one diffusion coding gradient pulse is emitted in each partial data set, and raw data of a k-space region are acquired during a first echo after a defined first echo time the k-space regions in total covering a complete k-space. Raw data of an established navigator k-space region are acquired during a second echo after a second echo time the navigator k-space region being identical for different partial diffusion gradient sequences. Reference raw data are acquired by a reference measurement sequence with multiple partial reference sequences.

主权项

1. A method to generate magnetic resonance exposures of an examination subject, comprising:
operating a magnetic resonance data acquisition unit to acquire diffusion-coded raw data from an examination subject in the data acquisition unit, by executing a diffusion gradient measurement sequence comprising a plurality of successive partial diffusion gradient sequences; in each of said partial diffusion gradient sequences, emitting at least one diffusion coding gradient pulse, acquiring raw data during a first partial diffusion gradient sequence echo after a defined first partial diffusion gradient echo sequence time and entering said raw data into a k-space region of k-space, with the respective k-space regions acquired during respective different partial diffusion gradient sequences in total encompassing said k-space, and acquiring navigator raw data during a second partial diffusion gradient sequence echo after a defined second partial diffusion gradient sequence time and entering said navigator raw data into a predetermined navigator k-space region of k-space, said navigator k-space region being identical for each partial diffusion gradient sequence; acquiring reference raw data by operating said magnetic resonance data acquisition unit with a reference measurement sequence comprising a plurality of partial reference sequences; and in each of said partial reference sequences, acquiring first reference raw data during a first reference sequence echo after a first reference sequence echo time and entering said first reference raw data into a k-space region of k-space, the respective k-space regions into which said reference raw data are entered during respective different partial reference sequences in total encompassing all of said k-space, and acquiring second reference raw data during a second reference sequence echo at a second reference sequence echo time, and entering said second reference raw data into k-space regions, said k-space regions into which said second reference raw data are entered during respective different partial reference sequences in total encompassing all of said k-space.