DESIGN OF AN EXPERIMENTAL LASER SPECKLE CONTRAST IMAGING SYSTEM AND IMAGE

English version České info

Laser speckle contrast imaging (LSCI) is a noninvasive method, which uses scattered light to estimate the flow of a fluid containing scatterers. Thus, it can be especially used to estimate blood flow. Laser light is randomly scattered on the tissue and this refracted light interfere with reflected light, giving birth to laser speckle noise. As the light scatters on moving red blood cells, the speckle pattern is blurred due to the exposition time. This blurring is a function of velocity which can be estimated from the degree of blur, termed as speckle contrast. Therefore, blood cells act like contrast agent, outlining blood vessels. The simple setup, unnecessary contrast agent and unharming nature are making LSCI a popular tool for studying blood flow dynamics and vascular structure. This paper presents a new, simple experimental setup and image processing methods to treat laser speckle images aiming to estimate relative blood flow and vascular structure.

Keywords:
LSCI, laser speckle contrast imaging, blood flow, speckle noise

Autoři: Branislav Hesko; Vratislav Harabiš; Radim Kolář
Působiště autorů: Department of Biomedical Engineering, BUT, Brno, Czech Republic
Vyšlo v časopise: Lékař a technika - Clinician and Technology No. 3, 2017, 47, 101-107
Kategorie: Původní práce

Souhrn

Keywords:
LSCI, laser speckle contrast imaging, blood flow, speckle noise

Zdroje

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