Sparse (k, t)-space sampling patterns for dynamic imaging of partially separable functions where ky is the phase encoding axis, and kx, the frequency encoding axis, is into the page. The open circles represent the training data, s1(k, t), and the filled circles represent the imaging data, s2(k, t). (a) A conceptual (k, t)-space sampling pattern for partially separable functions of order 1. (b) A realizable (k, t)-space sampling pattern for higher order partially separable functions.