○Sayuki Takara¹, Takao Inoue¹, Sadahiro Nomura², Toshitaka Yamakawa³, Hirochika Imoto², Yuichi Maruta², Masatsugu Niwayama⁴, Michiyasu Suzuki² (1. Organization of Research Initiatives, Yamaguchi University, 2. Department of Neurosurgery, Yamaguchi University School of Medicine, 3. Faculty of Advanced Science and Technology, Kumamoto University, 4. Graduate School of Medical Photonics, Shizuoka University)