MULTI LAYER RADIATION DELIVERY BALLOON

摘要

This invention is a sealed radiation source (10), which may be used to deliver a radioactive dose to a site in a body lumen. The source (10) includes a thin flexible substrate (12), and a layer of radioisotope (16) attached thereto. The source (10) may further comprise additional layers such as one or more tie layers (14) disposed between the substrate (12), the radioisotope layer (16), and one or more outer coating layers (16). In one embodiment the source (10) is wrapped around an inflatable balloon (22).