| http://www.w3.org/ns/prov#value | - ted to an electricity source. [0026] According to an embodiment of the present invention, the waveguide is within the treatment tool and the treatment tool may have an aperture to allow the emission of radiation from the waveguide. [0027] According to an embodiment of the present invention, the aperture may be fitted with an optical element such as a lens or a reflective surface. [0028] Turing to
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