MAGNETIC RESONANCE IMAGING METHOD AND APPARATUS
First Claim
1. A magnetic resonance (MR) imaging method, comprising:
- operating an MR scanner, while a subject is situated therein, to scan the subject with a multi-echo MR data acquisition sequence, including exciting nuclear spins in the subject, with the excited nuclear spins producing N asymmetric magnetic resonance echo signals, wherein N is greater than or equal to 2;
operating said MR scanner to read out raw data from the subject during said N asymmetric magnetic resonance echo signals, and entering the raw data into an electronic memory as k-space data; and
accessing said k-space data from a computer and, in said computer, reconstructing a magnetic resonance image of the subject from said k-space data, and making the magnetic resonance image available at an output of the computer in electronic form as a datafile.
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Accused Products
Abstract
In a magnetic resonance imaging method and apparatus, the scanner is operated with a multi-echo sequence in order to acquire k-space data of a multi-echo magnetic resonance signal, and the k-space data are used to reconstruct a magnetic resonance image. The multi-echo magnetic resonance signal is an asymmetric multi-echo magnetic resonance signal, and the asymmetric multi-echo magnetic resonance signal includes N asymmetric echo magnetic resonance signals, wherein N is greater than or equal to 2. Asymmetric echo magnetic resonance signals can be acquired in a dual-echo steady-state sequence, so that scanning time is reduced and the degree of comfort of a subject is improved because the magnetization process reaches a steady state quickly so the magnetic resonance signal is less affected by inhomogeneities that may exist in the basic magnetic field or a gradient magnetic field, and the intensity of the magnetic resonance signal is increased.
15 Citations
10 Claims
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1. A magnetic resonance (MR) imaging method, comprising:
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operating an MR scanner, while a subject is situated therein, to scan the subject with a multi-echo MR data acquisition sequence, including exciting nuclear spins in the subject, with the excited nuclear spins producing N asymmetric magnetic resonance echo signals, wherein N is greater than or equal to 2; operating said MR scanner to read out raw data from the subject during said N asymmetric magnetic resonance echo signals, and entering the raw data into an electronic memory as k-space data; and accessing said k-space data from a computer and, in said computer, reconstructing a magnetic resonance image of the subject from said k-space data, and making the magnetic resonance image available at an output of the computer in electronic form as a datafile. - View Dependent Claims (2, 3, 4, 5)
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6. A magnetic resonance (MR) apparatus, comprising:
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an MR scanner; a control computer configured to operate said MR scanner, while a subject is situated therein, to scan the subject with a multi-echo MR data acquisition sequence, including exciting nuclear spins in the subject, with the excited nuclear spins producing N asymmetric magnetic resonance echo signals, wherein N is greater than or equal to 2; said control computer being configured to operate said MR scanner to read out raw data from the subject during said N asymmetric magnetic resonance echo signals, and to enter the raw data into an electronic memory as k-space data; and a processor configured to access said k-space data and to reconstruct a magnetic resonance image of the subject from said k-space data, and to make the magnetic resonance image available at an output of the computer in electronic form as a datafile. - View Dependent Claims (7, 8, 9, 10)
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Specification