Patent ID: 7901441

Claim:
A method of administering a photodynamic therapy, comprising: (a) inserting an imaging catheter comprising a light source and an imaging device within a body cavity or vessel, the imaging catheter having a first end and a second end, the light source being configured to deliver electromagnetic irradiation to a site of interest, and the imaging device being configured to obtain an image from the site of interest; (b) inserting a photodynamic agent delivery catheter within the body cavity or vessel and advancing the delivery catheter to the site of interest; (c) delivering a photodynamic agent to the site of interest; (d) removing the photodynamic agent delivery catheter from the site of interest; and; (e) using the light source to deliver electromagnetic energy to the photodynamic agent at the site of interest to activate the photodynamic agent, wherein the imaging catheter remains in the body cavity or vessel when the photodynamic agent delivery catheter is removed from the site of interest, and steps (b) through (d) occur while maintaining the imaging catheter within the body cavity or vessel for continually obtaining the image from the site of interest.