Optimizing the precision of laser speckle contrast imaging.

Optimizing the precision of laser speckle contrast imaging.
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DOI:
10.1038/s41598-023-45303-z
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发表时间:
2023-10-20
期刊:
影响因子:
4.6
通讯作者:
Postnov, Dmitry D.
Postnov, Dmitry D.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Olmos, Alberto Gonzalez;Zilpelwar, Sharvari;Sunil, Smrithi;Boas, David A.;Postnov, Dmitry D.

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激光散斑衬度成像(LSCI)是一种快速发展的技术,广泛应用于组织灌注的全场表征。近年来,在解释LSCI测量结果和提高该技术的准确性方面取得了重大进展。另一方面,该方法的精度还有待详细研究,尽管它与许多生物医学应用的准确性一样重要。在这里,我们结合联合收割机模拟,理论和动物实验,系统地评估和重新分析的关键因素的作用,定义LSCI精度的散斑像素尺寸比,偏振,曝光时间和相机相关的噪声。我们发现,与既定的假设相反,较小的散斑尺寸和较短的曝光时间可以提高精度,而相机的选择是不太重要的,并不影响信噪比显着。
Laser speckle contrast imaging (LSCI) is a rapidly developing technology broadly applied for the full-field characterization of tissue perfusion. Over the recent years, significant advancements have been made in interpreting LSCI measurements and improving the technique’s accuracy. On the other hand, the method’s precision has yet to be studied in detail, despite being as important as accuracy for many biomedical applications. Here we combine simulation, theory and animal experiments to systematically evaluate and re-analyze the role of key factors defining LSCI precision—speckle-to-pixel size ratio, polarisation, exposure time and camera-related noise. We show that contrary to the established assumptions, smaller speckle size and shorter exposure time can improve the precision, while the camera choice is less critical and does not affect the signal-to-noise ratio significantly.
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发表时间: 2009
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