US 6,583,623 B1 · Interleaved water and fat dual-echo spin echo magnetic resonance imaging with intrinsic chemical shift elimination

Abstract

In magnetic resonance imaging, a pulse sequence is used to obtain both water-only and fat-only signals within a single acquisition time. Pulses and readout gradients are applied to take a proton-density-weighted image of the water, a proton-density-weighted image of the fat, and a T2-weighted image of the water. Between the first water readout gradient and the fat readout gradient, a spoiling gradient is applied to spoil the first water echo. Between the fat readout gradient and the second water readout gradient, a refocusing gradient is applied to refocus the second water echo. The proton-density-weighted images of water and fat are combined to form water-plus-fat images free of in-plane and through-plane chemical-shift artifacts.

Claims21

Dependent claims

A method for magnetic resonance imaging of a subject which comprises water and fat, the method comprising:

(a) taking a first, water-only selective echo spin echo (proton-density-weighted) image of the water;
(b) taking a first, fat-only selective echo spin echo (proton-density-weighted) image of the fat;
(c) taking a second, water-only selective echo spin echo (T2-weighted image) of the water;
and
(d) imaging the subject in accordance with the images taken in steps (a)-(c) to achieve an image of the subject with intrinsic chemical shift elimination in a single acquisition time.

2 more elements

Dependencies are inferred from the claim text.

Interleaved water and fat dual-echo spin echo magnetic resonance imaging with intrinsic chemical shift elimination

Life of this patent

Interleaved water and fat dual-echo spin echo magnetic resonance imaging with intrinsic chemical shift elimination

Life of this patent

Abstract

Claims21