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:
Oct. 12, 2021
Filed:
May. 06, 2020
Massachusetts Institute of Technology, Cambridge, MA (US);
Ashley Brown Raynal, West Chester, PA (US);
Ian W. Hunter, Lincoln, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A nuclear magnet resonance (NMR) system probes samples using a stochastically pulsed radio-frequency magnetic field. The NMR system uses active shims to compensate for spatial inhomogeneity in the bias magnetic field applied by a small permanent magnet. The active shim, made of a flexible conductor, creates a magnetic field when current is passed through it. The magnetic field created by the active shim can compensate for a first, second or third order spherical harmonic spatial inhomogeneity. The NMR system may have an array of active shims, with each active shim compensating for a spherical harmonic spatial inhomogeneity. The array of active shims may be arranged within the NMR system so as to increase power efficiency. The NMR system can accommodate a standard NMR sample tube and can be used to measure nuclear spin density or acquire an NMR spectrum.