High Resolution Ultrasound Imaging Using Frequency Domain Interferometry―Suppression of Interference Using Adaptive Frequency Averaging―

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): High Resolution Ultrasound Imaging Using Frequency Domain Interferometry―Suppression of Interference Using Adaptive Frequency Averaging―

著者名: Hirofumi Taki (Graduate School of Informatics, Kyoto University), Takuya Sakamoto (Graduate School of Informatics, Kyoto University), Makoto Yamakawa (Advanced Biomedical Engineering Research Unit, Kyoto University), Tsuyoshi Shiina (Graduate School of Me

著者名(英語): Hirofumi Taki (Graduate School of Informatics, Kyoto University), Takuya Sakamoto (Graduate School of Informatics, Kyoto University), Makoto Yamakawa (Advanced Biomedical Engineering Research Unit, Kyoto University), Tsuyoshi Shiina (Graduate School of Medicine, Kyoto University), Toru Sato (Graduate School of Informatics, Kyoto University)

キーワード: ultrasound imaging，high-resolution，vascular ultrasound，frequency domain interferometry，frequency averaging

要約(英語): We have reported that frequency domain interferometry (FDI) imaging with the Capon method has the potential to acquire high range-resolution ultrasound images. The reported method employed uniform frequency averaging to suppress coherent interferences. In atmospheric radar imaging, adaptive averaging has proposed to perfectly suppress coherent interference. In the present study, we applied adaptive frequency averaging to the FDI imaging method and investigated its image quality in a simulation study, where the -6dB bandwidth of the echo returned from an interface was 2.6MHz. When two targets 0.1mm apart from each other were located in a region of interest the FDI imaging method using uniform frequency averaging succeeded in estimating the interface ranges correctly; however, the estimated echo intensity was 6.3dB lower than the true echo intensity. In contrast, the FDI imaging method using adaptive frequency averaging successfully estimated the interface ranges, and the estimated echo intensity was only 0.049dB higher than the true one. These results indicate that the FDI imaging method using adaptive frequency averaging has excellent accuracy in the measurement of echo intensity, under the condition that the echo waveform returned from each target is the same as the waveform of the reference signal.

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: 1552-1557 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/132/10/132_1552/_article/-char/ja/