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Exploration of movement artefacts in handheld laser speckle contrast perfusion imaging
- Source :
- Biomedical optics express, 11(5), 2352-2365. The Optical Society, Biomed Opt Express
- Publication Year :
- 2020
-
Abstract
- Functional performance of handheld laser speckle contrast imaging (LSCI) is compromised by movement artefacts. Here we quantify the movements of a handheld LSCI system employing electromagnetic (EM) tracking and measure the applied translational, tilt and on-surface laser beam speeds. By observing speckle contrast on static objects, the magnitudes of translation and tilt of wavefronts are explored for various scattering levels of the objects. We conclude that for tissue mimicking static phantoms, on-surface speeds play a dominant role to wavefront tilt speed in creation of movement artefacts. The ratio depends on the optical properties of the phantom. Furthermore, with the same applied speed, the drop in the speckle contrast increases with decreasing reduced scattering coefficient, and hence the related movement artefact increases.
- Subjects :
- media_common.quotation_subject
Tracking (particle physics)
01 natural sciences
Imaging phantom
Article
010309 optics
03 medical and health sciences
Speckle pattern
symbols.namesake
Optics
0103 physical sciences
Contrast (vision)
030304 developmental biology
media_common
Wavefront
Physics
0303 health sciences
business.industry
Scattering
22/4 OA procedure
Atomic and Molecular Physics, and Optics
Tilt (optics)
symbols
business
Doppler effect
Biotechnology
Subjects
Details
- Language :
- English
- ISSN :
- 21567085
- Database :
- OpenAIRE
- Journal :
- Biomedical optics express, 11(5), 2352-2365. The Optical Society, Biomed Opt Express
- Accession number :
- edsair.doi.dedup.....37f9b65feea13a7a1330134f1cc3f9be