The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2018
Filed:
Apr. 20, 2016
Siemens Healthcare Gmbh, Erlangen, DE;
Universitaetsspital Basel, Basel, CH;
Oliver Bieri, Liestal, CH;
Tom Hilbert, Lausanne, CH;
Tobias Kober, Lausanne, CH;
Gunnar Krueger, Watertown-Boston, MA (US);
Damien Nguyen, Pully, CH;
Siemens Healthcare GmbH, Erlangen, DE;
Universitaetsspital Basel, Basel, CH;
Abstract
A method for improving image homogeneity of image data acquired from balanced Steady-State Free Precision (bSSFP) sequences in magnetic resonance imaging. Multiple bSSFP sequences are performed with different radio frequency phase increments to create multiple bSSFP image volumes with different phase offsets ϕ. Each image has voxels whose intensity M is a function of a nuclear resonance signal (or magnetization) measured by the MR imaging apparatus. Per-voxel fitting of a mathematical signal model onto the measured magnetization of the field of view in function of the phase offsets Φ. Then the spin density M, the relaxation time ratio Λ and the local phase offset ΔΦ are determined from the fit for each voxel. A homogeneous image of the object is generated by calculating the signal intensity in each voxel, using the spin density Mand the relaxation time ratio Λ, wherein ΔΦ is chosen such that Φ−ΔΦ=0°.