Quality improvement of acoustic-resolution photoacoustic imaging of skin vasculature based on practical synthetic-aperture focusing and bandpass filtering

Yasuyuki Tsunoi, Kenichiro Yoshimi, Ryota Watanabe, Nori Kumai, Mitsuhiro Terakawa, Shunichi Sato

    研究成果: Article査読

    4 被引用数 (Scopus)

    抄録

    We previously developed a compact acoustic-resolution photoacoustic (PA) imaging system with optical fiber-based illumination, by which blood vessels in the rat skin were visualized in vivo. However, there were issues to be improved in the imaging characteristics: blurring in the out-of-focus region of the ultrasound sensor and degraded resolution due to low-frequency components in the PA signals. These are common limitations in acoustic-resolution PA imaging methods. In this study, we attempted to solve these problems by introducing signal processing methods based both on the synthetic-aperture focusing technique, which was applied only to signals in the detection zone of the sensor in the horizontal direction that was determined in advance in a phantom study, and on digital acoustic signal filtering with three specific frequency bands. Ex vivo and in vivo PA imaging of blood vessels in the rat skin and subcutaneous tissue showed the validity of the present signal processing methods.

    本文言語English
    論文番号127001
    ジャーナルJapanese Journal of Applied Physics
    57
    12
    DOI
    出版ステータスPublished - 2018 12 1

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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