University of California

Siemens Healthcare Gmbh

Tess Armstrong

Holden H Wu

Marcel Dominik Nickel

Stephan Kannengiesser

Xiaodong Zhong

Vibhas S Deshpande

Li Pan

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

Growing community of inventors

Los Angeles, CA, United States of America

Tess Armstrong