Takashi Matsuo
Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan
E-mail address: matuo@rm.kanagawa-it.ac.jp
(Received July 22, 2012; Accepted August 1, 2012)
Abstract. No Abstract
Keywords: Blood Vessel, Circle of Willis, Cerebral Artery, Fractal, Optimum Principle