1. Device for endoluminal treatment of a blood vessel, comprising: a flexible waveguide having an elongated axis, a proximal end optically connected to a radiation source, and a distal end configured to be placed in a blood vessel and containing at least one emitting surface emitting radiation from the radiation source to the side with respect to the elongated axis of the waveguide to the portion of the surrounding wall of the vessel passing in the angular range. ! 2. The device according to claim 1, wherein said at least one emitting surface is located in an angular range with respect to the elongated axis of the waveguide. ! 3. The device according to claim 2, wherein said at least one emitting surface forms a curved surface contour and extends in an angular range of at least about 90 ° to about 360 °. ! 4. The device according to claim 2, in which the specified at least one emitting surface has a substantially conical shape and is essentially convex or concave. ! 5. The device according to claim 1, additionally containing a reflective surface spaced from the specified at least one emitting surface in the distal direction and facing it to reflect forward-directed radiation to the side with respect to the elongated axis of the waveguide. ! 6. The device according to claim 5, in which the reflective surface forms a curved surface contour oriented at an acute angle with respect to the elongated axis of the waveguide. ! 7. The device according to claim 6, in which the reflective surface is essentially conical in shape and is substantially convex or concave. ! 8. The device according to claim 1, d�1. Устройство для эндолюминального лечения кровеносного сосуда, содержащее: гибкий волновод, имеющий удлиненную ось, проксимальный конец, оптически соединимый с источником излучения, и дистальный конец, выполненный с возможностью размещения в кровеносном сосуде и содержащий по меньшей мере одну испускающую поверхность, испускающую излучение от источника излучения в сторону по
