Method and magnetic resonance apparatus for acquiring magnetic resonance data with a prospective motion correction
First Claim
1. A method for acquiring magnetic resonance data with 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 in the examination subject, that is not identical to the established examination volume, from which navigator signals are to be acquired by operation of said magnetic resonance scanner;
(c) in said control computer, generating navigator control signals based on the established navigator volume and, from said control computer, emitting said navigator control signals to said magnetic resonance scanner and thereby operating said magnetic resonance scanner to acquire at least one navigator signal, serving as a navigator reference signal, from said navigator volume at a time t0;
(d) from said control computer, also operating said magnetic resonance scanner with said navigator control signals to acquire at least one further navigator signal from said navigator volume at time t1>
t0;
(e) in said control computer, determining navigator volume motion of the established navigator volume as a difference between the further navigator signal and the navigator reference signal;
(f) in said control computer, setting data acquisition parameters based on said navigator volume motion and the established examination volume, and generating examination control signals that electronically represent the set data acquisition parameters and, from said control computer, emitting said examination control signals to said magnetic resonance scanner and thereby operating said magnetic resonance scanner according to said set data acquisition parameters to acquire a magnetic resonance signal from said examination volume; and
(g) compiling a data record of magnetic resonance signals from said established examination volume by, from said control computer, repeating (d) through (f) until all signals for said data record have been acquired from said established examination volume, and making said data record available in electronic form as a data file from said control computer.
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Accused Products
Abstract
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.
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Citations
17 Claims
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1. A method for acquiring magnetic resonance data with motion correction, comprising:
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(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 in the examination subject, that is not identical to the established examination volume, from which navigator signals are to be acquired by operation of said magnetic resonance scanner; (c) in said control computer, generating navigator control signals based on the established navigator volume and, from said control computer, emitting said navigator control signals to said magnetic resonance scanner and thereby operating said magnetic resonance scanner to acquire at least one navigator signal, serving as a navigator reference signal, from said navigator volume at a time t0; (d) from said control computer, also operating said magnetic resonance scanner with said navigator control signals to acquire at least one further navigator signal from said navigator volume at time t1>
t0;(e) in said control computer, determining navigator volume motion of the established navigator volume as a difference between the further navigator signal and the navigator reference signal; (f) in said control computer, setting data acquisition parameters based on said navigator volume motion and the established examination volume, and generating examination control signals that electronically represent the set data acquisition parameters and, from said control computer, emitting said examination control signals to said magnetic resonance scanner and thereby operating said magnetic resonance scanner according to said set data acquisition parameters to acquire a magnetic resonance signal from said examination volume; and (g) compiling a data record of magnetic resonance signals from said established examination volume by, from said control computer, repeating (d) through (f) until all signals for said data record have been acquired from said established examination volume, and making said data record available in electronic form as a data file from said control computer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A magnetic resonance apparatus comprising:
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a magnetic resonance scanner; a control computer of the magnetic resonance scanner, configured to (a) establish an examination volume in a subject from which magnetic resonance signals are to be acquired by operation of said magnetic resonance scanner; said control computer being configured to (b) establish a navigator volume in the examination subject, that is not identical to said examination volume, from which navigator signals are to be acquired by operation of said magnetic resonance scanner; said control computer being configured to (c) generate navigator control signals based on the established navigator volume and, from said control computer, emit said navigator control signals to said magnetic resonance scanner and thereby operate said magnetic resonance scanner to acquire at least one navigator signal, serving as a navigator reference signal, from said navigator volume at a time t0; said control computer being configured to (d) also operate said magnetic resonance scanner with said navigator control signals to acquire at least one further navigator signal from said navigator volume at time t1>
t0;said control computer being configured to (e) determine navigator volume motion of the established navigator volume from a difference between the further navigator signal and the navigator reference signal; said control computer being configured to (f) set magnetic resonance data acquisition parameters based on said navigator volume motion and the established examination volume, and generate examination control signals that electronically represent the set data acquisition parameters and, from said control computer, emit said examination control signals to said magnetic resonance scanner and thereby operate said magnetic resonance scanner according to said set magnetic resonance data acquisition parameters to acquire a magnetic resonance signal from said examination volume; and said control computer being configured to compile a data record of magnetic resonance signals from said examination volume by (d) through (f) until all signals for said data record have been acquired from said examination volume, and to make said data record available in electronic form as a data file from said control computer. - View Dependent Claims (17)
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Specification