CO(2−1) observed velocity field and corresponding residuals derived from DISCFIT modelling for NGC 4593. The left panel showcases the observed velocity field of the CO(2−1) emission, with the scale bar units given in km/s. The middle panel shows the residuals produced by subtracting the DISCFIT model from the observed data, with green contours representing levels of 5σ_rms. The bottom panel compares the rotation curve velocities (V_rot) obtained from both 3D-BAROLO and DISCFIT models, considering cases with and without radial velocity (V_rad).