A system for treating an aneurysm comprises an elongate flexible shaft and a nosecone. An expandable member may be used to expand an expandable endoframe within a double-walled filling structure. The filling structure is adapted to be filled with a hardenable fluid filing medium so that an outer wall conforms to an inside surface of the aneurysm and an inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the endoframe engages the inner wall of the filling structure. One or more tethers releasably couple the filling structure and/or endoframe with the shaft thereby constraining axial movement of the structures relative to each other. The nosecone is constructed to have a series of side ports and a through lumen such that the nosecone can be positioned with a guidewire and simultaneously receive a contrast media for performing angiography through the lumen.
