University of California

Siemens Healthcare Gmbh

Holden H Wu

Tess Armstrong

Marcel Dominik Nickel

Stephan Kannengiesser

Xiaodong Zhong

Vibhas S Deshpande

Li Pan

Daniel Ennis

Kyung Hyun Sung

Eric Aliotta

Novena Rangwala

Xinzhou Li

Le Zhang

A method for proton resonance frequency shift (PRF) and T-based temperature mapping using a magnetic resonance imaging (MRI) system includes acquiring, using the MRI system, a set of magnetic resonance (MR) data from a region of interest of a subject by performing a variable-flip-angle multi-echo gradient-echo 3D stack-of-radial pulse sequence. The pulse sequence is configured to acquire radial k-space data in a plurality of segments, each segment acquired with each of a plurality of flip angles. The method further includes generating at least one Tmap based on the set of MR data, generating at least one PRF temperature map based on the set of MR data, generating at least one T-based temperature map based on the set of MR data and displaying the PRF temperature map and the T-based temperature map. In another embodiment, the MR data may be used to generate a plurality of quantitative parameter maps for each of the plurality of MR parameters such as T, proton-density fat fraction (PDFF), and R*.

System and method for free-breathing quantitative multiparametric mri

A method for acquiring magnetic resonance imaging data with respiratory motion compensation using one or more motion signals includes acquiring a plurality of gradient-delay-corrected radial readout views of a subject using a free-breathing multi-echo pulse sequence, and sampling a plurality of data points of the gradient-delay-corrected radial readout views to yield a self-gating signal. The self-gating signal is used to determine a plurality of respiratory motion states corresponding to the plurality of gradient-delay-corrected radial readout views. The respiratory motion states are used to correct respiratory motion bias in the gradient-delay-corrected radial readout views, thereby yielding gradient-delay-corrected and motion-compensated multi-echo data. One or more images are reconstructed using the gradient-delay-corrected and motion-compensated multi-echo data.

Free-breathing MRI with motion compensation

Systems and methods for predicting motion of a target using imaging are provided. In one aspect, a method includes receiving image data, acquired using an imaging system, corresponding to a region of interest ('ROI') in a subject, and generating a set of reconstructed images from the image data. The method also includes processing the set of reconstructed images to obtain motion information associated with a target in the ROI, and applying the motion information in a motion prediction framework to estimate a predicted motion of the target. The method further includes generating a report based on the predicted motion estimated.

Systems and methods for real-time motion prediction in dynamic imaging

Systems and methods are disclosed for a simultaneous 3D Tand Bmapping technique based on VFA imaging using a reference region VFA (RR-VFA) approach to eliminate the need for a separate Bmapping scan while imaging the prostate. The RR-VFA method assumes the existence of a 'reference region' that is distributed throughout the volume of interest and is well characterized by a known Trelaxation time. In particular, fat is generally selected as the reference region due to its distribution in the body. Binhomogeneity is estimated in the fat tissue and interpolated over the entire volume of interest, thus eliminating the need for an additional scan.

Method and apparatus for accurate parametric mapping

A system and method for optimized diffusion-weighted imaging is provided. In one aspect, the method includes providing a plurality of constraints for imaging a target at a selected diffusion weighting, and applying an optimization framework to generate an optimized diffusion encoding gradient waveform satisfying the plurality of constraints. The method also includes performing, using the MRI system, a pulse sequence comprising the optimized diffusion encoding gradient waveform to generate diffusion-weighted data, and generating at least one image of the target using the diffusion-weighted data.

System and method for optimized diffusion-weighted imaging

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Los Angeles, CA, United States of America

Holden H Wu