Back to results
US 12,313,710 B2Granted
B1+ mapping near metallic hardware
AssigneesSiemens Healthineers AG, New York University
InventorsMahesh Bharath Keerthivasan, Iman Khodarahmi
Life of this patent
Estimating the term…
Abstract
A method can include obtaining a scaling factor for a location proximate a metallic object by optimizing a function of an acquired dataset and a simulated dataset. The simulated dataset can include a first signal from a first pulse having a first excitation flip angle and a first refocusing flip angle. The simulated dataset can include a second signal from a second pulse having a second excitation flip angle and a second refocusing flip angle.
Claims18
A method, comprising:
- obtaining a scaling factor corresponding to a ratio of actual B1+ to nominal B1+ for a location proximate a metallic object by minimizing a function of an acquired dataset and a simulated dataset;
- and
- obtaining a B1+ map for a region proximate the metallic object based on the scaling factor;
- wherein the simulated dataset comprises:
- a first signal from a first pulse having a first excitation flip angle and a first refocusing flip angle;
- and
- a second signal from a second pulse having a second excitation flip angle and a second refocusing flip angle.
4 more elements
A magnetic resonance imaging system, comprising:
- at least one processor;
- and
- a memory, with computer code instructions stored thereon, the computer code instructions, when executed by the at least one processor, cause the at least one processor to:
- obtain a scaling factor corresponding to a ratio of actual B1+ to nominal B1+ for a location proximate a metallic object by minimizing a function of an acquired dataset and a simulated dataset;
- and
- obtain a B1+ map for a region proximate the metallic object based on the scaling factor;
- wherein the simulated dataset comprises:
- a first signal from a first pulse having a first excitation flip angle and a first refocusing flip angle;
- and
- a second signal from a second pulse having a second excitation flip angle and a second refocusing flip angle.
7 more elements
Dependencies are inferred from the claim text.