1. A volume visualization system comprising a display operatively coupled to an image-reconstructing module configured to process 3D data acquired by ultra-wideband radar and to generate a 2D reconstructed image, wherein the image reconstruction module is further configured to provide separate volume rendering of time-invariant and time-variant 3D data sets acquired by said ultra-wideband radar thereby extracting time-invariant and time-variant elements of the reconstructed image; and to generate one or more perceiving image ingredients to be distinctively applied to said extracted time-invariant and/or time-variant elements of the reconstructed image; and wherein the display is configured to simultaneously present the time-invariant and time-variant elements of the reconstructed image together with applied perceiving image ingredients.