Figure 1.

Data in k-space are usually collected on a Cartesian grid (left). The Fourier transform is used to convert the k-space to an image of size N_x by N_y pixels (right). The extent of k-space covered (k_x,max and k_y,max) is inversely proportional to the image resolution (Δx and Δy). The spacing between adjacent samples in k-space (Δk_x and Δk_y) is inversely proportional to the field-of-view (FOV_x and FOV_y).