VV is more specifically designed for qualitative evaluation of image registration and deformation field visualization. VV runs (at least!) on Linux, Windows and Mac OS in 32 and 64 bits. VV is an open-source and cross platform image viewer, designed for fast and simple visualization of spatio-temporal images: 2D, 2D+t, 3D and 3D+t (or 4D) images. David Sarrut, Pierre Seroul, Joël Schaerer, Simon Rit, Jef Vandemeulebroucke, Thomas Baudier, Bharath Navalpakkam, Gauthier Bouilhol, Romulo Pinho, Vivien Delmon and Maxime Pech, ( Mailing List Subscription)