IMPROVED PHOTOTHERAPEUTIC METHODS AND DEVICES FOR IRRADIATING COLUMNAR ENVIRONMENTS

摘要

The present invention provides improved meth- ods and devices for delivering light to the surface of a biological column, for example in treatment of Bar- rett's esophagus using PDT. The improvement com- prises the use of an extended irradiation segment or window (as seen in panel A of drawing Fig. 1). The improved methods of the present invention per- mit treatment lenghts of the biological column to be increased without increasing the incidence of stricture formation.