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Space-directional approach to improve blood vessel visualization and temporal resolution in laser speckle contrast imaging
- Source :
- Journal of Biomedical Optics
- Publication Year :
- 2019
-
Abstract
- Blood flow is a parameter used to diagnose vascular diseases based on flow speed, blood pressure, and vessel size. Different techniques have been developed to estimate the relative blood flow speed and to improve the visualization of deep blood vessels; one such technique is laser speckle contrast imaging (LSCI). LSCI images contain a high level of noise mainly when deep blood vessels are imaged. To improve their visualization, several approaches for contrast computation have been developed. However, there is a compromise between noise attenuation and temporal resolution. On the one hand, spatial approaches have low spatial resolution, high temporal resolution, and significant noise attenuation, while temporal approaches have the opposite. A recent approach combines a temporal base with a directional process that allows improving the visualization of blood vessels. Nevertheless, it still contains a high level of noise and requires a high number of raw frames for its base. We propose, a space-directional approach focused on improving noise attenuation and temporal resolution for contrast computation. The results of reference approaches and the proposed one are compared quantitatively. Moreover, it is shown that the visualization of blood vessels in LSCI images can be improved by a general morphological process when the noise level is reduced.
- Subjects :
- Paper
Computer science
media_common.quotation_subject
laser speckle contrast imaging
Biomedical Engineering
digital processing images
Image processing
01 natural sciences
010309 optics
Biomaterials
blood vessels
Speckle pattern
0103 physical sciences
Image Processing, Computer-Assisted
Laser-Doppler Flowmetry
Contrast (vision)
Humans
Computer vision
Image resolution
media_common
Skin
business.industry
Phantoms, Imaging
Special Section on Biomedical Imaging and Sensing
Blood flow
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Visualization
Noise
Regional Blood Flow
Temporal resolution
Artificial intelligence
speckle
business
Algorithms
Blood Flow Velocity
Subjects
Details
- ISSN :
- 15602281
- Volume :
- 25
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Journal of biomedical optics
- Accession number :
- edsair.doi.dedup.....47e21643d67ba50775535e146645bfff