Radial evolution of density structure in the solar corona

White-light measurements made by the SOHO coronagraphs (LASCO for Large Ang le Spectrometric Coronagraph) and the HAO Mauna Loa Mk III K-coronameter ar e combined to follow the evolution of path-integrated density structure in the solar corona overlying both coronal hole and quiet Sun regions from 1.1 5 to 5.5 R-o. The global imaging provided by these two instruments confirms and strengthens earlier results discovered by spacecraft radio ranging mea surements [Woo and Habbal, 1999], that the imprint of density structure at the Sun - as manifested in the background latitudinal density profile close st to the Sun at 1.15 R-o - is carried essentially radially into interplane tary space with the same density gradient. The only exceptions are coronal streamers that evolve into the heliospheric current sheet within a few sola r radii of the Sun.