METHOD AND MAGNETIC RESONANCE APPARATUS FOR ACQUIRING MAGNETIC RESONANCE DATA WITH A PROSPECTIVE MOTION CORRECTION

摘要

In a method and magnetic resonance (MR) apparatus for performing an MR examination with prospective motion correction, multiple MR signals are acquired. For each MR signal, signal, an examination volume is established and a navigator volume is established for recording navigator signals. The examination volume and the navigator volume are not identical. At least one navigator reference signal is acquired at a time t0, and at least one navigator signal is acquired at a time t1>t0. Motion information is determined from the navigator signal and the navigator reference signal, and the recording parameters are set as a function of the motion information. At least one further magnetic resonance signal is acquired with this setting.

主权项

1. A method for acquiring magnetic resonance data with a prospective motion correction, comprising:
(a) in a control computer of a magnetic resonance scanner, establishing an examination volume in a subject from which magnetic resonance signals are to be acquired by operation of said magnetic resonance scanner; (b) in said control computer, establishing a navigator volume, that is not identical to said examination volume, in the examination subject, from which navigator signals are to be acquired by operation of said magnetic resonance scanner; (c) from said control computer, operating said magnetic resonance scanner to acquire at least one navigator reference signal from said navigator volume at a time t0; (d) from said control computer, operating said magnetic resonance scanner to acquire at least one navigator signal from said navigator volume at time t1>t0; (e) in said control computer, determining motion information from the navigator signal and the navigator reference signal; (f) from said control computer, setting data acquisition parameters as a function of said motion information, and operating said MR scanner according to said parameters to acquire a magnetic resonance signal from said examination volume; and (g) compiling a data record of magnetic resonance signals from said examination volume by, from said control computer, repeating (d) through (f) until all signals for said data record have been acquired from said examination volume, and making said data record available in electronic form as a data file from said control computer.