1. A method for estimating nuclear magnetic resonance (NMR) properties of NMR-observable samples, the method comprising the steps of: acquiring NMR data using a rosette k-space trajectory, the NMR data being acquired under controlled conditions; modeling a behavior of an NMR-observable sample using a parameterized equation s n, the parameterized equation being: 4 s n = &Sum; q &it; &it; &Sum; r &it; &it; M xy0 &af; ( q, r ) &it; g &af; ( q, r ) n &it; ψ n &af; ( q, r ), the M xy0 (q,r) parameter corresponding to a spin density of the NMR-observable sample, the g(q,r) parameter corresponding to a relaxation rate of the NMR-observable sample, the g(q,r) parameter further corresponding to frequency of the NMR-observable sample, the &psgr; n (q,r) corresponding to a known spatial phase modulation imposed by gradient magnetic fields; and inverting the parameterized equation using the acquired NMR data, the inverted parameterized equation providing an estimate of M xy0 (q,r) and g(q,r).