Light generating devices for illuminating portions of vascular tissue, to render photodynamic therapy. In one embodiment, a light source array preferably including a plurality of light emitting diodes, a focusing lens, and a light diffusing element are included in a distal end of a catheter. A balloon...http://www.google.ca/patents/US7730894?utm_source=gb-gplus-sharePatent US7730894 - Photodynamic therapy apparatus and method for vascular tissue treatment
