ワイヤレス温度計測の精度向上のための回転走査による体動アーチファクト低減法

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2016/08/01

タイトル(英語): Body Motion Artifact Reduction Method using Rotary Scanning for Accuracy Improvement of Wireless Temperature Measurement

著者名: Tonthat Loi（秋田大学大学院理工学研究科），安藝　史崇（秋田大学大学院理工学研究科），松田　瑛生（秋田大学大学院理工学研究科），齊藤　元（秋田大学大学院医学系研究科），吉村　昇（東北公益文科大学），水戸部　一孝（秋田大学大学院理工学研究科）

著者名(英語): Tonthat Loi (Graduate School of Engineering Science, Akita University), Fumitaka Aki (Graduate School of Engineering Science, Akita University), Eki Matsuda (Graduate School of Engineering Science, Akita University), Hajime Saito (Graduate School of Medicine and Faculty of Medicine, Akita University), Noboru Yoshimura (Tohoku University of Community Service and Science), Kazutaka Mitobe (Graduate School of Engineering Science, Akita University)

キーワード: ハイパーサーミア，ワイヤレス温度計測，磁性体，体動アーチファクト，回転走査　　hyperthermia，wireless temperature measurement，ferromagnetic implant，body motion artifact，rotary scanning

要約(英語): In hyperthermia treatment, the accurate temperature measurement of tumor region is vital to determine the therapeutic effectiveness of heating. Conventional methods require thermal probes to be inserted invasively into tumor region. However, by using Ferromagnetic Implant with Low Curie Temperature (FILCT) as thermal probe, we have developed a wireless temperature measurement method that can noninvasively measure the temperature of tumor region from outside of the body. To make the approach feasible in clinical settings, challenges remain when dealing with body motion artifact. When the material is injected into tumor region, the relative position between the magnetic field supply and detection (MFSD) unit and the material is supposed to fluctuate with periodic respiration and heartbeat. In physical experiments, the FILCT temperature cannot be detected, because the detection voltage was buried by the artifact noise (SN ratio=-3.1 dB). Hence, this study proposed a body motion artifact reduction method by rotating scanning the MFSD unit in a different period cycle from body motion. By extracting the power spectrum synchronized with the rotary scanning, we confirmed that regardless of presence of body motion, the change of the power around Curie point is sufficiently large to detect whether treatment temperature has been reached.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.136 No.8 （2016） 特集：高性能永久磁石の最先端研究とその応用動向

本誌掲載ページ: 529-534 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/136/8/136_529/_article/-char/ja/