Method and apparatus for performing accelarated magnetic resonance imaging with reduced off-resonance effect
US12345785B2 · kind B2 · utility
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Key dates
| Filing date | Apr 21, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Oct 20, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of performing magnetic resonance imaging of a body using a magnetic resonance imaging scanner the method includes applying to the body a time-varying magnetic field gradient (Gx, Gy, Gz) defining a continuous trajectory (ST) in k-space complying with a set of constraints including constraints on maximum amplitude and maximum slew rate of the time-varying magnetic field gradient, such that sampling points (KS) belonging to the trajectory define a pseudo-random sampling of the k-space, approximating a predetermined target sampling density, the trajectory in k-space minimizing, subject to the set of constraints, a cost function defined by the difference between a first term, called attraction term, promoting consistency of the distribution of sampling points in k-space with the predetermined target sampling density, and a second term, called repulsion term, promoting separation in k-space between sampling points, the repulsion term being expressed as a sum of contributions corresponding to respective pairs of sampling points; wherein each the contribution is weighted by a weight which increase with temporal separation of the sampling points along the trajectory in k-space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.