| abstract |
(57) [Problem] To obtain a cell image used for pathological diagnosis without removing a sentinel lymph node, which is a lymph node that first metastasizes when a tumor metastasizes to the lymph node. SOLUTION: A gamma probe 80 measures a gamma dose radiated from a radioisotope previously injected around a tumor, detects a sentinel lymph node 1, and emits the sentinel lymph node 1 from a light source unit 100 of an OCT (Optical Coherrence Tomography) unit 11. The low coherence light L1 having a coherence length of 1.4 μm is converted into a signal light L4 by a fiber coupling optical system 120. And the reference light L3, the signal light L2 is irradiated on the detected sentinel lymph node 1, and the frequency of the reference light L3 is changed to the signal light L4. Shifts to a frequency with a slight frequency difference from the signal light L4 The reflected light from a predetermined depth of the sentinel lymph node 1 and the shifted reference light L3 to interfere with each other, At 150, the intensity of the interference light is measured to obtain an ultra-high resolution optical tomographic image, which is a cell image of the sentinel lymph node. |