Method and apparatus are provided to treat atherosclerosis wherein the artery is partially closed by dilating the artery while preserving the vital and sensitive endothelial layer thereof. Microwave energy having a frequency from 3 GHz to 300 GHz is propagated into the arterial wall to produce a desired...http://www.google.se/patents/US6226553?utm_source=gb-gplus-sharePatent US6226553 - Endothelium preserving microwave treatment for atherosclerois