Low-artifact and long depth of field photoacoustic microscopy using a Gaussian-weighted annular array

Low-artifact and long depth of field photoacoustic microscopy using a Gaussian-weighted annular array
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使用高斯加权环形阵列的低伪影和长景深光声显微镜

DOI:
10.7567/1882-0786/ab0a92
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发表时间:
2019-04
影响因子:
2.3
通讯作者:
Xiaojun Liu
Xiaojun Liu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhipeng Liu;Chao Tao;Xiaojun Liu

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提出了一种高斯加权环形超声阵列,以减少伪影和扩大声分辨光声显微镜的景深。通过在每个环上应用高斯加权,与传统聚焦换能器相比,环形阵列抑制旁瓣约18 dB,并且光声图像中的“X”形伪影显著减少。此外,通过控制每个环的延迟时间,环形阵列可以动态地聚焦在不同的深度,从而实现长景深。实验结果表明,该方案可以显著提高光声显微成像质量。
A Gaussian-weighted annular ultrasound array is proposed to reduce artifacts and extend the depth of field of acoustical-resolution photoacoustic microscopy. By applying Gaussian weighting on each ring, the annular array suppresses the side lobes by about 18 dB compared to a conventional focused transducer, and “X”-shaped artifacts are significantly reduced in the photoacoustic images. Additionally, by controlling the delay time of each ring, the annular array can dynamically focus at different depths, thus achieving a long depth of field. Experiments are performed which demonstrate that the proposed scheme can significantly improve the imaging quality of photoacoustic microscopy.
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