FIG. 2.

This figure shows a forward model of 2D slice acquisition in (a) and the corresponding SRR algorithm in the image domain in (b). The arrows show the flow of the data, where the black arrows show the data in the high-resolution image space and the blue (or gray) arrows show the data in the space of the slices. Matrices are implemented as image operators. The inverse problem is solved through gradient descent minimization of the reconstruction error obtained from transformed slice errors and a regularization term.