1. A method, comprising: acquiring magnetic resonance data associated with an area of interest of a subject, wherein the area of interest corresponds to at least one physiological activity of the subject; and performing image reconstruction, comprising compressed sensing reconstruction, on at least a portion of the acquired magnetic resonance data, wherein acquiring the magnetic resonance data comprises receiving data associated with arterial spin labeling (ASL) of the area of interest of the subject, and wherein performing the image reconstruction comprises estimating a current state of the area of interest from image data corresponding to a past state of the area of interest based on spatiotemporal sparsity.