US 10,871,534 B2Granted

Accelerated magnetic resonance imaging using a tilted reconstruction kernel in phase encoded and point spread function encoded K-space

AssigneeThe General Hospital Corporation

InventorsKawin Setsompop, Lawrence L. Wald, Zijing Dong, Hua Guo, Fuyixue Wang, Timothy G. Reese

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Abstract

Systems and methods for accelerated magnetic resonance imaging using a tilted reconstruction kernel to synthesize unsampled k-space data in phase encoded and point spread function (“PSF”) encoded k-space data are provided. Images reconstructed from the data have reduced B0-related distortions and reduced T2* blurring. In general, data are acquired with systematically optimized undersampling of the PSF and phase encoding subspace. Parallel imaging reconstruction is implemented with a B0 inhomogeneity informed approach to achieve greater than twenty-fold acceleration of the PSF encoding dimension. A tilted reconstruction kernel is used to exploit the correlations in the phase encoding-PSF encoding subspace.

Claims15

Dependent claims

A method for reconstructing an image of a subject from data acquired with a magnetic resonance imaging (MRI) system, the steps of the method comprising:

(a) acquiring first data with a magnetic resonance imaging (MRI) system, wherein the first data comprise k-space data encoded along at least a phase encoding dimension and a point spread function (PSF) encoding dimension and wherein the first data are undersampled along at least one of the phase encoding dimension or the PSF encoding dimension;
(b) generating second data with a computer system by synthesizing unsampled k-space points in at least one of the phase encoding dimension or the PSF encoding dimension by applying a tilted reconstruction kernel to the first data, wherein the tilted reconstruction kernel spans the phase encoding dimension and the PSF encoding dimension;
(c) reconstructing an image from the second data.

Dependencies are inferred from the claim text.

Facts

Application: 16/429,467Filed 3 Jun 2019 · us provisional application
Priority: 1 Jun 2018
Published: US 2019/0369186 A15 Dec 2019
Granted: 22 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01R 33/4818
NMR imaging systems: mR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g.…
G01R 33/5611
By reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences: parallel magnetic resonance imaging, e.g.…
G01R 33/50
NMR imaging systems: based on the determination of relaxation times , e.g. T1 measurement by IR sequences; T2 measurement by multiple-echo sequences
G01R 33/5619
By reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences: by temporal sharing of data, e.g. keyhole,…

Family

Application62/679,236Us provisional application · filed 1 Jun 2018
US 2019/0369186 A1Pre-grant publication · published 5 Dec 2019
US 10,871,534 B2This patent

From the US filing history. Foreign family members aren’t listed.

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