1. A computer-readable medium storing computer executable instructions that when executed by a computer associated with a pMRI apparatus cause the pMRI apparatus to perform a method, the method comprising: acquiring under-sampled data sets; assembling a static composite data set from the under-sampled data sets; creating an under-sampled dynamic data set from a frame of interest in the under-sampled data sets and the static composite data set; assembling a composite dynamic data set from the under-sampled data sets; producing a dynamic calibration data set from the composite dynamic data set and the static composite data set; computing a set of dynamic reconstruction parameters from the dynamic calibration data set; reconstructing an image of a dynamic portion of the object being imaged based, at least in part, on the under-sampled dynamic data from the frame of interest and the dynamic reconstruction parameters; reconstructing an image of a static portion of the object being imaged based, at least in part, on the static composite data set; and producing a final image by combining the reconstructed image of the dynamic portion of the object being imaged to the reconstructed image of the static portion of the object being imaged.