生体ファントムを対象としたマイクロ波CT撮像における画像改善法の研究

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2012/10/01

タイトル(英語): Study on Image Improving Methods for Phantom-based Imaging in Microwave CT

著者名: 田村　睦（プロコム（株）），高橋　輝行（新潟大学大学院自然科学研究科），竹内　裕貴（新潟大学大学院自然科学研究科），宮川　道夫（新潟大学大学院自然科学研究科）

著者名(英語): Mutsumi Tamura (PROCOM CO., LTD.), Teruyuki Takahashi (Graduate School of Science and Technology, Niigata University), Yuuki Takeuchi (Graduate School of Science and Technology, Niigata University), Michio Miyakawa (Graduate School of Science and Technology, Niigata University)

キーワード: チャープパルス，マイクロ波CT，ダイナミックレンジ，時間領域，ロックインアンプ　　chirp pulse，microwave CT，dynamic range，time domain，lock-in amplifier

要約(英語): We have developed the method for improvement in the receiver dynamic range and signal processing technique of image reconstruction in demodulated direct current voltage-based microwave CT (DC-MCT). By using standard signal generator with the low phase noise and phase synchronization of signal source, the reconstructed amplitude- and phase-images were obtained. Improvement in receiver dynamic range was attempted on the distributed system gains to radio- and low-frequencies. By removing unwanted components of the received signal, the receiver dynamic range was expanded. Two methods for removing unwanted components from the received signal were attempted by using time domain filters to remove all receiver noises from the measurement data. By removing unwanted components, the reconstructed definite tumor images of the breast-and biological-phantoms were obtained. At the result, this paper shows usefulness of the new method that improves the receiver dynamic range and reconstructed images.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.132 No.10 （2012） 特集：医療関連電子技術のニュートピック

本誌掲載ページ: 1538-1546 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/ieejeiss/132/10/132_1538/_article/-char/ja/