Patent attributes
A phototherapy method includes: introducing an ultrasound endoscope into a digestive tract; visualizing an irradiation target site in a body by the ultrasound endoscope introduced into the digestive tract; puncturing a vicinity of the irradiation target site with a distal-end section of a needle tube that is made to protrude from a distal-end section of the ultrasound endoscope introduced into the digestive tract; exposing an optical fiber from the distal-end section of the needle tube that has punctured the vicinity of the irradiation target site, by making the needle tube retreat with respect to the optical fiber accommodated inside the needle tube; and radiating light emitted from the exposed optical fiber onto the irradiation target site.
