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首页> 外文期刊>Optics Letters >Improved optoacoustic microscopy through three-dimensional spatial impulse response synthetic aperture focusing technique
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Improved optoacoustic microscopy through three-dimensional spatial impulse response synthetic aperture focusing technique

机译：通过三维空间脉冲响应合成孔径聚焦技术改进的光声显微镜

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摘要

Synthetic aperture focusing technique (SAFT) is effective in restoring lateral resolution of ultrasonic images for scans with focusing-related distortions. Although successfully applied in pulse-echo ultrasonics, the physical nature of an optoacoustic modality requires a modified algorithm to return accurate results. The SIR-SAFT method reported here uses the spatial impulse response (SIR) of the transducer to weight the contributions to the SAFT and is tailored to provide significant resolution and signal gains for out-of-focus sources in scanning optoacoustic microscopy systems. Furthermore, the SIR-SAFT is implemented in full three dimensions, applicable to signals both far of and at the focus of the ultrasonic detector. The method has been further shown to outperform conventional SAFT algorithms for both simulated and experimental optoacoustic data.
机译：合成孔径聚焦技术（SAFT）可有效地恢复超声图像的横向分辨率，以进行与聚焦相关的畸变扫描。尽管已成功应用于脉冲回波超声中，但光声模态的物理性质要求修改后的算法才能返回准确的结果。此处报告的SIR-SAFT方法使用换能器的空间脉冲响应（SIR）来加权对SAFT的贡献，并经过专门设计以为扫描光声显微镜系统中的散焦源提供显着的分辨率和信号增益。此外，SIR-SAFT可以在三个维度上实现，适用于超声检测器远处和聚焦处的信号。对于模拟和实验光声数据，该方法还被证明优于传统的SAFT算法。

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