SYSTEMS AND METHODS FOR VIRTUAL FREQUENCY SELECTIVE INVERSION IN MAGNETIC RESONANCE

摘要

Magnetic resonance imaging (MRI) acquisition and reconstruction techniques that invert MR signals of selected frequencies without the application of inversion RF pulses are disclosed. An example method comprises acquisition of at least one MR image representative dataset and an associated phase reference dataset, and classifies anatomical material into a first component representing anatomical material having a first range of resonance frequencies associated with a first range of phase differences between the MR image representative dataset and the reference image dataset and a second component representing anatomical material having a second range of resonance frequencies associated with a second range of phase differences between the MR image representative dataset and the reference image dataset. The method assigns different visual attributes to first and second components derived using phase differences between the MR image representative dataset and the reference image dataset and displays an image.

主权项

1. A method for acquiring magnetic resonance imaging (MRI) data, the method comprising:
acquiring an MR image representative dataset, interleaving acquisition of an associated phase reference dataset, wherein, the phase reference dataset acquisition employs RF pulses with small flip angles in order to minimize changes in magnetization prior to acquisition of said MR image representative dataset, and wherein the phase reference dataset acquisition employs an echo time different from the echo time used for acquiring said MR image representative dataset; and deriving an image using phase sensitive reconstruction from the MR image representative dataset and the associated phase reference dataset with,
a first component representing anatomical material having a first range of resonance frequencies associated with a first range of phase differences between the MR image representative dataset and the associated phase reference dataset, anda second component representing anatomical material having a second range of resonance frequencies associated with a second range of phase differences between the MR image representative dataset and the associated phase reference dataset.