1 July 2003 Modified laser speckle imaging method with improved spatial resolution
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J. of Biomedical Optics, 8(3), (2003). doi:10.1117/1.1578089
Abstract
A two-dimensional map of blood flow is crucial for physiological studies. We present a modified laser speckle imaging method (LSI) that is based on the temporal statistics of a time-integrated speckle. A model experiment was performed for the validation of this technique. The spatial and temporal resolutions of this method were studied in theory and compared with current laser speckle contrast analysis (LASCA); the comparison indicates that the spatial resolution of the modified LSI is five times higher than that of current LASCA. Cerebral blood flow under different temperatures was investigated by our modified LSI. Compared with the results obtained by LASCA, the blood flow map obtained by the modified LSI possessed higher spatial resolution and provided additional information about changes in blood perfusion in small blood vessels. These results suggest that this is a suitable method for imaging the full field of blood flow without scanning and provides much higher spatial resolution than that of current LASCA and other laser Doppler perfusion imaging methods.
Haiying Cheng, Qingming Luo, Shaoqun Zeng, Shangbin Chen, Jian Cen, Hui Gong, "Modified laser speckle imaging method with improved spatial resolution," Journal of Biomedical Optics 8(3), (1 July 2003). http://dx.doi.org/10.1117/1.1578089
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KEYWORDS
Blood circulation

Speckle

Spatial resolution

Blood

Speckle pattern

Laser speckle imaging

Doppler effect

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