Alles Erwin J, Noimark Sacha, Zhang Edward, Beard Paul C, Desjardins Adrien E
Department of Medical Physics and Biomedical Engineering, University College London, London WC1E 6BT, UK.
Department of Medical Physics and Biomedical Engineering, University College London, London WC1E 6BT, UK; Materials Chemistry Research Centre, UCL Department of Chemistry, London WC1H 0AJ, UK.
Biomed Opt Express. 2016 Aug 26;7(9):3696-3704. doi: 10.1364/BOE.7.003696. eCollection 2016 Sep 1.
A miniature, directional fibre-optic acoustic source is presented that employs geometrical focussing to generate a nearly-collimated acoustic pencil beam. When paired with a fibre-optic acoustic detector, an all-optical ultrasound probe with an outer diameter of 2.5 mm is obtained that acquires a pulse-echo image line at each probe position without the need for image reconstruction. B-mode images can be acquired by translating the probe and concatenating the image lines, and artefacts resulting from probe positioning uncertainty are shown to be significantly lower than those observed for conventional synthetic aperture scanning of a non-directional acoustic source. The high image quality obtained for excised vascular tissue suggests that the all-optical ultrasound probe is ideally suited for , interventional applications.
本文介绍了一种微型定向光纤声源，该声源利用几何聚焦来产生近乎准直的声学笔形波束。当与光纤声学探测器配对使用时，可获得外径为2.5毫米的全光学超声探头，该探头在每个探头位置获取脉冲回波图像线，无需图像重建。通过平移探头并拼接图像线可获取B模式图像，结果表明，与非定向声源的传统合成孔径扫描相比，探头定位不确定性产生的伪像显著降低。在切除的血管组织上获得的高图像质量表明，全光学超声探头非常适合介入应用。
