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Laser speckle imaging for blood flow based on pixel resolved zero-padding auto-correlation coefficient distribution
- Source :
- Optics Communications. 439:38-46
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In this paper we present a method of zero-padding temporal auto-correlation imaging (ztDCI) for imaging blood flows. Compared with temporal auto-correlation imaging (tDCI), ztDCI effectively slows down the decorrelation speed of speckle frames, so it has wider applicable speed range. We also prove that the combination of tDCI and ztDCI can compensate the non-monotonous trend of ztDCI VS speed and provides higher relative signal to noise rate (rSNR) for slow flows and short exposure times than laser speckle contrast imaging (LSCI). It captures both slow and fast flows independent of camera exposure time which will be an advantage for in vivo or clinical applications.
- Subjects :
- Physics
Pixel
business.industry
Autocorrelation
Laser Speckle Imaging
02 engineering and technology
Blood flow
021001 nanoscience & nanotechnology
01 natural sciences
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
010309 optics
Speckle pattern
Distribution (mathematics)
Optics
0103 physical sciences
Range (statistics)
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
0210 nano-technology
business
Decorrelation
Subjects
Details
- ISSN :
- 00304018
- Volume :
- 439
- Database :
- OpenAIRE
- Journal :
- Optics Communications
- Accession number :
- edsair.doi...........efbe2fcdb2d824d8342905e5d0697b64