title: Development of ti-coated ferromagnetic needle, adaptable for ablation cancer therapy by high-frequency induction heating.
abstract: To develop a novel ablation therapy for human solid cancer, the heating properties of a ferromagnetic carbon steel rod and a prototype Ti-coated needle using this carbon steel rod, were investigated in several high-frequency outputs at 300 kHz. In the former, the heating property was drastically different among the three inclination angles (θ = 0°, 45° and 90°) relative to the magnetic flux direction as a result of the shape magnetic anisotropy. However, the effect of the inclination angles was completely eliminated in the latter. It is considered that the complete non-oriented heating property relative to the magnetic flux direction allows the precise control of the ablation temperature during minimally invasive thermotherapy without a lead-wire connected to a fiber-optic thermometer. This newly designed Ti-coated device will be suitable for clinical use combined with its superior biocompatibility for ablation treatments using high-frequency induction heating.
authors: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan. naohara.takashi.mu@ehime-u.ac.jp.
authors: Takashi
authors: T
authors: Naohara
authors: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan. aono.hiromichi.mf@ehime-u.ac.jp.
authors: Hiromichi
authors: H
authors: Aono
authors: Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan. maehara.tsunehiro.mg@ehime-u.ac.jp.
authors: Tsunehiro
authors: T
authors: Maehara
authors: Department of Environmental Materials Engineering, Niihama National College of Technology, Niihama 792-8580, Japan. hirazawa@mat.niihama-nct.ac.jp.
authors: Hideyuki
authors: H
authors: Hirazawa
authors: Department of Electronic Control Engineering, Niihama National College of Technology, Niihama 792-8580, Japan. shin@ect.niihama-nct.ac.jp.
authors: Shinya
authors: S
authors: Matsutomo
authors: Department of Surgery, Graduate School of Medicine, Ehime University, Toon 791-0295, Japan. yuji@m.ehime-u.ac.jp.
authors: Yuji
authors: Y
authors: Watanabe