General Electric Company

Zhiqiang Li

Xiaoli Zhao

Ajeetkumar Gaddipati

Philip James Beatty

Jean Helen Brittain

Dawei Gui

Shaorong Chang

Reed Frederick Busse

James Hartman Holmes

Ken-Pin Hwang

Howard Andrew Rowley

In an embodiment, a method includes performing a magnetic resonance (MR) data acquisition sequence including the acquisition of a plurality of blades of k-space data rotated about a section of k-space. The k-space data is representative of gyromagnetic material within a subject of interest, and each blade includes a plurality of encode lines defining a width of the respective blade. The acquisition of each blade includes receiving MR signal from echoes in two or more separate echo trains to fill at least a portion of the plurality of encode lines, and the echo trains are separated by an excitation pulse.

Multiple excitation blade acquisition for motion correction in magnetic resonance imaging

A method includes the acts of acquiring a blade of k-space calibration data; acquiring a set of T1-weighted k-space imaging data, the set of T1-weighted k-space imaging data having blades of undersampled k-space data rotated about a section of k-space. Each blade of undersampled k-space data includes first data points having acquired data and second data points that are missing data. The method also includes generating a set of reconstruction weights for the blades of undersampled k-space data using the blade of k-space calibration data; synthesizing k-space data for at least a portion of the second data points using the set of reconstruction weights; and generating a T1-weighted image using the T1-weighted k-space imaging data and the synthesized k-space data.

Motion correction in accelerated T1-weighted magnetic resonance imaging

A computer readable storage medium has stored thereon a computer program having instructions, which, when executed by a computer, cause the computer to apply a first plurality of RF pulses during a first TR interval of an MR pulse sequence to generate a first echo train. A plurality of echoes of the first echo train are split into a plurality of echo pairs. Within a first echo space, first and second gradient pulses are applied during respective first and second generated echoes, and respective first and second sets of k-space data are acquired that correspond to respective first and second blades of k-space data in the same k-space. The first and second blades have orientations at different angles from one another. The instructions further cause the computer to reconstruct an image based on the acquired first and second sets of k-space data.

System and method for split-echo split-blade data collection for propeller magnetic resonance imaging

An apparatus and method of MR imaging is disclosed. The apparatus and method comprises segmenting acquisition of an echo train into separate odd and even acquisition blades in k-space, wherein the odd and even acquisition blades extend orthogonally through a common reference point in a central region of k-space. A segment of MR data is acquired using a quadratic phase modulation scheme, wherein a first set of MR echo signals occurring after odd-numbered RF refocusing pulses are stored in the odd acquisition blade, and a second set of MR echo signals occurring after even-numbered RF refocusing pulses are stored in the even acquisition blade. This acquisition and segmentation is repeated until a sufficient number of blades are acquired to fill k-space. Finally, an image is reconstructed from the acquisition blades.

Apparatus and method for acquisition and reconstruction of non-CPMG propeller sequences

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Tempe, AZ, United States of America

Zhiqiang Li