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:
Jun. 11, 2024
Filed:
Dec. 12, 2022
Siemens Healthcare Gmbh, Erlangen, DE;
Siemens Healthineers AG, Erlangen, DE;
Abstract
A method and apparatus for limiting an RF alternating magnetic field in MRI. The method includes: measuring a perpendicular distance between a local coil placed on a scanned part of a patient and the center of a detection hole of a magnetic resonance (MR) scanner; based on the perpendicular distance, determining a deviation between the Bfield strength at the position of the local coil during an MR scan and the Bfield strength at the center of the detection hole; based on the deviation, computing a conversion coefficient for conversion between the Bfield strength at the position of the local coil and the Bfield strength at the center of the detection hole; based on the Bfield strength required when the surface temperature of the local coil is equal to a safe temperature upper limit and the conversion coefficient, computing a maximum permissible field strength of the Bfield at the center of the detection hole. The Bfield may be limited to a smaller but still effective field strength range, reducing wastage of Bfield performance while ensuring patient safety and MR imaging quality.