Abstract: An endoprosthesis assembly for percutaneous deployment on a balloon catheter is disclosed. The assembly includes a radially expandable stent overlied by a tubular, low profile stent cover wrapped over the stent. The wrapped cover is thermally set to maintain its low profile wrapped configuration during deployment of the assembly. At the treatment site, the balloon portion of the catheter is inflated causing the stent to expand radially and the stent cover to unwrap and open to conform to the expanded configuration of the stent.

Abstract: Method and apparatus for maintaining an ion beam along a beam path from an ion source to an ion implantation station where workpieces are treated with the ion beam. A beam neutralizer is positioned upstream from the beam implantation station and injects neutralizing electrons into the ion beam. A magnetic field is created upstream from the position of the beam neutralizer for inhibiting upstream movement of neutralizing electrons. A disclosed technique for setting up the magnetic field for inhibiting electron movement is with spaced apart first and second permanent magnets.