Modeling movement artefacts in handheld laser speckle contrast perfusion imaging: influence of wavefront types

Ata Chizari; Wilson Tsong; Tom knop; Wiendelt Steenbergen

doi:10.1117/12.2609849

2 March 2022 Modeling movement artefacts in handheld laser speckle contrast perfusion imaging: influence of wavefront types

Ata Chizari, Wilson Tsong, Tom knop, Wiendelt Steenbergen

Author Affiliations +

Proceedings Volume 11959, Dynamics and Fluctuations in Biomedical Photonics XIX; 1195905 (2022) https://doi.org/10.1117/12.2609849
Event: SPIE BiOS, 2022, San Francisco, California, United States

Abstract

Movement artefacts distort handheld measurements of laser speckle contrast imaging (LSCI). Enabling a robust LSCI in handheld use brings convenience for both patients and clinical staff. However, there is a lack of a comprehensive model that can predict and potentially compensate the amount of movement artefacts occurring during a handheld LSCI measurement. Here, we propose an analytical-numerical model based on the optical Doppler effect for handheld LSCI in case of translation on a high scattering static surface. The model incorporates the type of illumination as well as the imaging geometry by taking into account the spread of wavevectors for illumination and detection. We validate the theoretical model by simulated dynamic speckles and experiments for the cases of (1) planar and spherical waves illumination and (2) scrambled waves illumination. Results of the speckle simulation are in agreement with predictions of the numerical model for semi-circular form of the density functions of the incoming and outgoing wavevectors.

Conference Presentation

Citation Download Citation

Ata Chizari, Wilson Tsong, Tom knop, and Wiendelt Steenbergen "Modeling movement artefacts in handheld laser speckle contrast perfusion imaging: influence of wavefront types", Proc. SPIE 11959, Dynamics and Fluctuations in Biomedical Photonics XIX, 1195905 (2 March 2022); https://doi.org/10.1117/12.2609849

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available