Influence of wavefront types on movement artefacts in handheld laser speckle contrast perfusion imaging
| Autor: | Ata Chizari, Wiendelt Steenbergen, Sven Schwieters, Wilson Tsong, Tom Knop |
|---|---|
| Přispěvatelé: | TechMed Centre, Biomedical Photonic Imaging |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Wavefront
Computer science business.industry media_common.quotation_subject Perfusion scanning Translation (geometry) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Speckle pattern symbols.namesake Planar Optics symbols Contrast (vision) Fresnel number Electrical and Electronic Engineering business Doppler effect media_common |
| Zdroj: | OSA Continuum, 4(6), 1875-1888. Optical Society of America |
| ISSN: | 2578-7519 |
| DOI: | 10.1364/osac.420479 |
| Popis: | Laser speckle contrast imaging (LSCI) is a non-invasive and affordable technique to visualize skin perfusion. Handheld use of the system facilitates measurements on various skin areas in a flexible manner. However, movement artefacts caused by handheld operation or test subject movements hamper its performance. In this work, we study the influence of the laser beam type in handheld-LSCI by evaluating the speckle contrast on static objects for beams with planar, spherical or scrambled wavefronts, and for movement artefacts caused by tilting or translation of wavefronts. We show that the scrambled waves made by often-used engineered diffusers lead to significantly larger movement artefacts than planar or spherical waves. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|