Page 5 - 《应用声学》2021年第1期

第 40 卷 第 1 期 Vol. 40, No. 1
2021 年 1 月 Journal of Applied Acoustics January, 2021

⋄ 生物医学超声与光声 ⋄

超声平面波经颅成像相位校正方法 ∗

宋亚龙 1,2 苏 畅 1,2,3† 李倩岩 1,2 林伟军 1,2,3

(1 中国科学院声学研究所 北京 100190)
(2 中国科学院大学 北京 100049)
(3 北京市海洋深部钻探测量工程技术研究中心 北京 100190)
摘要：超声平面波经颅成像时，由于颅骨对超声传播的影响引起图像质量下降，需要对颅骨造成的超声相位畸
变进行校正。为此，该文研究了两种相位补偿方法：基于近似射线声学的理论方法和基于时间反转的数值计算
方法，并利用数值仿真对比了两种方法的补偿和成像效果。结果表明：无论使用近似射线法还是时间反转法，
都能够有效地校正因颅骨造成的相位畸变；时间反转法成像的精度和结果要好于近似射线法，但所需的计算
资源和时间都要远远大于近似射线法；两种方法与平面波相干复合方法结合都能够一定程度上提高成像的对
比度和分辨率。该研究结果为超声经颅脑成像方法研究和设备研发提供了理论指导和技术支持。
关键词：经颅超声；平面波成像；时间反转；数值模拟
中图法分类号: O426 文献标识码: A 文章编号: 1000-310X(2021)01-0001-10
DOI: 10.11684/j.issn.1000-310X.2021.01.001

A study on the phase correction method in transcranial ultrasound
plane-wave imaging

SONG Yalong 1,2 SU Chang 1,2,3 LI Qianyan 1,2 LIN Weijun 1,2,3

(1 Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)
(3 Beijing Deep Sea Drilling Measurement Engineering Technology Research Center, Beijing 100190, China)

Abstract: In the process of transcranial ultrasonic plane wave imaging, the image quality is decreased due
to the influence of skull on ultrasonic propagation, so it is necessary to correct the ultrasonic phase distortion
caused by skull. For this reason, two methods of phase compensation are studied in this paper: the theoretical
method based on approximated ray acoustics and the numerical simulation method based on time reversal. The
results show that both the approximated ray method and the time reversal method can effectively correct the
phase distortion caused by the skull; the imaging accuracy of the time reversal method is better than that of
the approximated ray method, but the computing resources and time required are far greater than that of the
approximated ray method; both methods can improve the imaging resolution and contrast to a certain extent
combined with the coherent plane-wave compounding method. The results of this study provide theoretical
guidance and technical support for method and equipment development in ultrasonic brain imaging.
Keywords: Transcranial ultrasound; Plane wave imaging; Time reversal; Numerical simulation

2020-06-16 收稿; 2020-07-15 定稿
国家重点研发计划项目 (2018YFC0114900), 国家自然科学基金项目 (11604361, 81527901), 中国科学院青年创新促进会项目
∗
(2019024)
作者简介: 宋亚龙 (1993– ), 男, 河南漯河人, 硕士研究生, 研究方向: 声学。
† 通信作者 E-mail: suchang@mail.ioa.ac.cn