An areal implant has a flexible polymer-based basic structure (10) and X-ray-visible elements (12) and is preferably set up as a permanent implant. The X-ray-visible elements can be arranged in an areal pattern in order to be able to judge the position of the implant in the patient at any time by means...http://www.google.co.uk/patents/US20030010929?utm_source=gb-gplus-sharePatent US20030010929 - Areal implant with x-ray-visible elements
