(a) A fully-sampled T1ρ map, with images reconstructed with SENSE (b) 4-fold accelerated T1ρ, with images reconstructed with SENSE (c) 4-fold accelerated T1ρ, with images reconstructed with CS and spatiotemporal finite difference (STFD) (d) 4-fold accelerated T1ρ, with images reconstructed with CS and low-rank plus sparse with spatial finite difference (L + S SFD). Images courtesy Dr. Marcelo Zibetti and Dr. Ravinder Regatte, New York University, New York NY.