RT Journal Article SR Electronic T1 MR Imaging-Guided Interstitial Photodynamic Laser Therapy for Advanced Head and Neck Tumors JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1193 OP 1200 VO 26 IS 5 A1 H. Rolf Jäger A1 Magali N. Taylor A1 Tamer Theodossy A1 Colin Hopper YR 2005 UL http://www.ajnr.org/content/26/5/1193.abstract AB Summary: Photodynamic therapy (PDT) is a site-specific tumor treatment involving the administration of a photosensitizer activated by the local application of light. In interstitial PDT (IPDT), multiple laser fibers are inserted into the depth of the tumor. Image guidance is essential for accurate, safe, and uniform light delivery. We report a novel technique of IPDT for advanced head and neck tumors involving an open interventional MR system. Initial results are encouraging, with minimal procedural morbidity, successful palliation of symptoms, and prolongation of expected survival time.