General Electric Company

Ge Precision Healthcare LLC

King's College London

Anne Menini

Florian Wiesinger

Ana Beatriz Solana Sanchez

Ravindra Mohan Manjeshwar

Dattesh Dayanand Shanbhag

Sangtae Ahn

Sandeep Suryanarayana Kaushik

Hua Qian

Glenn Scott Slavin

Gareth John Barker

Emil Albert Ljungberg

Tobias Charles Wood

Steven Charles Williams

A method for generating motion-corrected medical images includes obtaining, via a processor, k-space data of a region of interest acquired by a magnetic resonance imaging system utilizing a 3D radial pulse sequence with ZTE acquisition including optional magnetization preparation pulses. The method also includes sampling, via the processor, the k-space data to obtain a plurality of interleaved k-space segments. The method further includes reconstructing, via the processor, one or more interleaved k-space segments of the plurality of interleaved k-space segments to generate a respective motion navigator volume. The method even further includes co-registering, via the processor, each respective motion navigator volume to estimate motion and performing motion correction on the one or more interleaved k-space segments and their corresponding k-space trajectories. The method still further includes generating, via the processor, a motion-corrected volume from all of the motion corrected interleaved k-space segments and their corresponding motion corrected k-space trajectories.

System and method for performing motion-insensitive and quiet three-dimensional magnetic resonance imaging

A method of magnetic resonance imaging an object utilizing a plurality of flip angles is provided. The method includes transmitting a first preparation pulse corresponding to a first flip angle of the plurality into the object, and receiving a first MR signal from the object based at least in part on the first preparation pulse. The method further includes transmitting a second preparation pulse corresponding to a second flip angle of the plurality into the object, receiving a second MR signal from the object based at least in part on the second preparation pulse, and generating a T1 mapping of the object based at least in part on the first MR signal and the second MR signal. The second flip angle is different than the first flip angle.

System and method for magnetic resonance imaging an object utilizing a plurality of flip angles

Methods and systems for production of silent, multi-gradient-echo, magnetic resonance images are provided. The methods employ iterative application of small updates to the magnetic field gradient followed by a short, non-selective radiofrequency pulse excitation and for free induction decay data acquisition. The magnetic field gradient updates allow for silent, self-refocusing pulse sequence. Subsequent applications of the magnetic field gradients allow for multiple echo data acquisitions, which may allow fast, silent production of T2*-weighted images.

Silent multi-gradient echo magnetic resonance imaging

Imaging system and method are presented. Emission scan (ES) and anatomical scan (AS) data corresponding to a target volume in a subject are received. One or more at least partial AS images are reconstructed using AS data. An image-space certainty (IC) map representing a confidence level (CL) for attenuation coefficients of selected voxels in AS images and a preliminary attenuation (PA) map based on AS images are generated. One or more of selected attenuation factors (AF) in projection-space are initialized based on PA map. A projection-space certainty (PC) map representing CL for the selected AF is generated based on IC map. An emission image of the target volume is initialized. The selected AF and emission image are iteratively updated based on the ES data, PC map, initial AF, and/or initial emission image. A desired emission image and/or AF values are determined based on the iteratively updated AF and/or emission image.

System and method for joint estimation of attenuation and activity information

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Sunnyvale, CA, United States of America

Anne Menini