Application for PDT laser therapy based on composite-type optical fiberscope

Oka, Kiyoshi; Seki, Takeshi*; Komori, Yuki

We developed a new minimally invasive laser device system using a composite-type optical fiberscope. The fiberscope consists of a centrally located 0.1 mm single fiber for laser treatment and its surrounding about 9,000 (5 m/piece) fibers for diagnosis. This system enables transmission of an image and 50 W Yb: fiber laser in parallel. By applying our fiberscope to laser treatment in various medical fields, it enables acquisition of an image, laser treatment, blood flow measurement, estimate of distance only in one fiberscope. By using this device for the PDT treatments applied to such as lung and cervical cancers, we expect to spot the irradiated area selectively while looking at a lesion. In this paper, we present a composition of minimally invasive laser therapy device using 1 mm composite-type optical fiberscope, the basics performance experiment result and an application to PDT therapy.