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:
May. 13, 2014
Filed:
Feb. 18, 2009
Nicolas Boulant, St. Aubin, FR;
Nicolas Boulant, St. Aubin, FR;
Abstract
A method of performing nuclear magnetic resonance imaging of a body comprising at least two populations of nuclei characterized by different spin resonance frequencies, the method comprising the steps of: (a) immerging said body (B) in a static magnetic field (B) for aligning nuclear spins along a magnetization axis; (b) exposing it to a transverse radio-frequency pulsed field (B) for flipping said nuclear spins, said radio-frequency pulsed field comprising a train of elementary pulses, each having a constant frequency and amplitude, and a continuous phase; (c) detecting a signal emitted by nuclear spins excited by said radio-frequency pulsed field; characterized in that it also comprises, prior to performing steps (a)-(c), computing a set of optimal parameters (N, τ, φ, ω) of said train of elementary pulses for minimizing the differences between the actual values of the spin-flip angles (FA) of nuclei belonging to each of said populations and predetermined target values thereof; said predetermined target values being different for nuclei belonging to different populations.