MAGNETIC RESONANCE IMAGING METHOD AND APPARATUS

摘要

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.

主权项

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.