A 3D close range Synthetic Aperture Radar system based on the Range Migration Algorithm and working with an affordable and compact Si-Ge Frequency Modulated Continuous Wave radar unit operating at 120 GHz with 19.5 GHz bandwidth is presented. A new method for enhancing lateral resolution combined with a normalization procedure is proposed leading to 0.33 central wavelength resolution. Lateral resolution is compared to a focusing lens system. An object of interest is displayed to reveal Synthetic Aperture Radar advantages in term of lateral resolution and depth of field for Non Destructive Testing and inspection.