Patent ID: 6936004

Claim:
A fluorescent diagnostic system comprising: a probe that comprises: a plurality of first optical fibers; a plurality of second optical fibers, a cross-sectional area of said first optical fibers being larger than a cross-sectional area of said second optical fibers, wherein said first and second optical fibers are tied as a composite bundle at a distal end side to provide a center channel configured to define an opening through which a treatment instrument can be moved, said first optical fibers are tied as a first branch bundle at a proximal end side and said second optical fibers are tied as a second branch bundle that is separated from said first branch bundle at the proximal end side; an excitation light source unit that emits excitation light, said excitation light being guided through said first optical fibers to excite a tissue of a living body so as to generate autofluorescence; and a detection unit that detects the light from the tissue guided through said second optical fibers.