Loop diffusers for diffusion of optical radiation

A fiber optic transmission apparatus comprising:

• at least one optical fiber having proximal and distal ends, the proximal end adapted for coupling to a source of phototherapeutic radiation;
• wherein each optical fiber has connected to its distal end a tip assembly for directing the radiation outward, the tip assembly being arranged in a loop configuration, and wherein each optical fiber is connected to a different tip assembly;
• wherein each tip assembly further comprises a tip enclosure containing a scattering medium further comprises a polymeric material which has light scattering particles dispersed therein;
• wherein the tip assembly also further comprises a reflective end cap;
• and
• a housing surrounding the at least one optical fiber and receiving the end cap, and at least a portion of each tip assembly.

A method of phototherapy comprising the steps of:

• placing a light diffusive assembly in proximity to a treatment site, the assembly comprising a plurality of light transmissive loop diffuser elements, each loop element further comprising a light scattering medium, such that radiation propagating through the medium is scattered outward,
• providing at least one source of therapeutic radiation to the diffusive assembly via an optical fiber connected to each loop element,
• disposing said loop elements initially in a retracted state and then redeploying them in an expanded state;
• and
• activating said radiation source to effect treatment with diffused radiation.