PLANET: An ellipse fitting approach for simultaneous T1 and T2 mapping using phase-cycled balanced steady-state free precession.

ABSTRACT: PURPOSE:To demonstrate the feasibility of a novel, ellipse fitting approach, named PLANET, for simultaneous estimation of relaxation times T1 and T2 from a single 3D phase-cycled balanced steady-state free precession (bSSFP) sequence. METHODS:A method is presented in which the elliptical signal model is used to describe the phase-cycled bSSFP steady-state signal. The fitting of the model to the acquired data is reformulated into a linear convex problem, which is solved directly by a linear least squares method, specific to ellipses. Subsequently, the relaxation times T1 and T2 , the banding free magnitude, and the off-resonance are calculated from the fitting results. RESULTS:Maps of T1 and T2 , as well as an off-resonance and a banding free magnitude can be simultaneously, quickly, and ro

SUBMITTER: Shcherbakova Y 

PROVIDER: S-EPMC5811804 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature