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:
Dec. 11, 2018
Filed:
Apr. 16, 2015
Commissariat a L'energie Atomique ET Aux Energies Alternatives, Paris, FR;
Aurélien Massire, Vouvray, FR;
Nicolas Boulant, Saint Aubin, FR;
Abstract
A method of designing a refocusing pulse or pulse train for Magnetic Resonance Imaging comprises the steps of: a) determining a phase-free performance criterion representative of a proximity between a rotation of nuclear spins induced by the pulse and a target operator, summed or averaged over one or more voxels of an imaging region of interest; and b) adjusting a plurality of control parameters of the pulse to maximize the phase-free performance criterion; wherein each target operator is chosen so the phase-free performance criterion takes a maximum value when the nuclear spins within all voxels undergo a rotation of a same angle θ around a rotation axis lying in a plane perpendicular to a magnetization field B, called a transverse plane, with an arbitrary orientation; wherein the angle θ is different from Mπ radians, with integer M, preferably with θ<π radians and even preferably with θ≤0.9·π radians.