Pre-emphasis techniques based on temperature dependent gradient system behavior for trajectory correction in magnetic resonance imaging

US11112472B2 · kind B2 · utility

Assignees

• Siemens Healthcare Limited · DE
• Julius-Maximilians-Universitat Wurzburg · DE
• The United States of America, as represented by the Secretary, Department of Health and Human Services · US

Inventors

• Gudrun Ruyters · Erlangen, DE
• Andrew Dewdney · Fairview Avenue, DE
• Manuel Stich · Schwandorf, DE
• Herbert Köstler · Retzbach, DE
• Christiane Pfaff · Unterebersbach, DE
• Tobias Wech · Würzburg, DE
• Adrienne Campbell · Bethesda, US

Key dates

• Filing date: Nov 29, 2019
• Grant date: Sep 7, 2021
• Expiry date: Jan 31, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56518
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gradient system characterization function (e.g., a gradient system transfer function) may be developed by measuring a behavior of the MR device at a target temperature and developing at least one gradient system characterization function for a gradient coil of a magnetic resonance (MR) device at the target temperature based on the measured behavior. A patient may be subsequently imaged by the MR device, wherein the imaging process comprises measuring a temperature of a gradient coil, determining a gradient system characterization function at the measured temperature, calculating a pre-emphasized gradient of the gradient coil, and imaging the patient using the pre-emphasized magnetic field component.