Depth resolution in multifocus laser speckle contrast imaging
- 1 October 2021
- journal article
- research article
- Published by Optica Publishing Group in Optics Letters
- Vol. 46 (19), 5059-5062
- https://doi.org/10.1364/ol.436334
Abstract
Laser speckle contrast imaging (LSCI) can be used to evaluate blood flow based on spatial or temporal speckle statistics, but its accuracy is undermined by out-of-focus image blur. In this Letter, we show how the fraction of dynamic versus static light scattering is dependent on focus, and describe a deconvolution strategy to correct for out-of-focus blur. With the aid of a z-splitter, which enables instantaneous multifocus imaging, we demonstrate depth-resolved LSCI that can robustly extract multi-plane structural and flow-speed information simultaneously. This method is applied to in vivo imaging of blood vessels in a mouse cortex and provides improved estimates of blood flow speed throughout a depth range of $300 {\rm{\unicode{x00B5}{\rm m}}}$.
Funding Information
- National Institutes of Health (R01NS116139, R21GM128020)
This publication has 23 references indexed in Scilit:
- Laser speckle contrast imaging with extended depth of field for in-vivo tissue imagingBiomedical Optics Express, 2013
- Quantitative imaging of ischemic stroke through thinned skull in mice with Multi Exposure Speckle ImagingBiomedical Optics Express, 2010
- Delayed Stabilization of Dendritic Spines in Fragile X MiceJournal of Neuroscience, 2010
- Spatial extent of oxygen metabolism and hemodynamic changes during functional activation of the rat somatosensory cortexNeuroImage, 2005
- Modified laser speckle imaging method with improved spatial resolutionJournal of Biomedical Optics, 2003
- Investigating non-Gaussian scattering processes by using nth -order intensity correlation functionsJournal of the Optical Society of America A, 1999
- Spatially varying dynamical properties of turbid media probed with diffusing temporal light correlationJournal of the Optical Society of America A, 1997
- Flow visualization by means of single-exposure speckle photographyOptics Communications, 1981
- An iterative technique for the rectification of observed distributionsThe Astronomical Journal, 1974
- Bayesian-Based Iterative Method of Image Restoration*Journal of the Optical Society of America, 1972