MR IMAGING USING MULTI-ECHO SEGMENTED K-SPACE ACQUISITION

摘要

The invention relates to a method of MR imaging of at least an object (10) placed in an examination volume of a MR device (1). It is an object of the invention to enable fast MR imaging using a multi-echo imaging technique which is robust with respect to motion. The method of the invention comprises the steps of:—subjecting the object (10) to a number of shots of a multi-echo imaging sequence, a train of echo signals being generated by each shot, acquiring the echo signals, wherein each echo signal represents a k-space profile, wherein k-space (20) is divided into a central k-space part (21) and one or more peripheral k-space parts (22, 23), wherein the central k-space part (21) is sampled by a single shot of the multi-echo imaging sequence, and wherein the peripheral k-space parts (22, 23) are sampled by one or more further shots (25, 28) of the multi-echo sequence, and—reconstructing a MR image from the k-space profiles. Moreover, the invention relates to a MR device for carrying out this method as well as to a computer program to be run on a MR device.

主权项

1. A method of magnetic resonance (MR1 imaging of an object placed in an examination volume of a MR device, the method comprising the steps of:
subjecting the object to a number of shots of a multi-echo imaging sequence, a train of echo signals being generated by each shot, acquiring the echo signals, wherein each echo signal represents a k-space profile, wherein k-space is divided into a central k-space part and one or more peripheral k-space parts, wherein the central k-space part is sampled by a single shot of the multi-echo imaging sequence, and wherein the peripheral k-space parts are sampled by one or more further shots of the multi-echo sequence, wherein sampling of the peripheral k-space parts starts at a position in k-space where the sampling of the central k-space part starts and/or the sampling of the peripheral k-space parts ends at a position in k-space where the sampling of the central k-space part ends wherein the k-space profiles acquired from adjacent positions in k-space have adjacent or identical echo index numbers, the echo index number indicating the position of each echo signal within the train of echo signals generated by each shot of the multi-echo imaging sequence and reconstructing a MR image from the k-space profiles.