Vertically Polarized Laser Speckle Contrast Imaging to Monitor Blood Flow in Pulp. Issue 20 (28th November 2021)

• Record Type: Journal Article
• Authors: Xu, Fenfen; Xie, Chengfeng; Zhang, Yubao; Shi, Gang; Shi, Jiulin; Xu, Xiaojun; Zhao, Youjiang; Zhu, Yirui; He, Xingdao
• Is Part Of: Journal of modern optics. Volume 68:Issue 20(2021)
• Page Start: 1075
• Page End: 1082
• Publication Date: 2021-11-28
• Subjects: Laser speckle contrast imaging -- blood flow in pulp -- laser speckle spatial contrast algorithm -- laser speckle temporal contrast algorithm; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2021.1973604
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract : This research aimed to study a polarized laser speckle contrast imaging (LSCI) system to assess the pulp blood flow, where the ability of vertically polarized LSCI (vp-LSCI) and the non-polarized LSCI (np-LSCI) systems has been compared through space contrast algorithm and time contrast algorithm. The results showed that the vp-LSCI system could detect a wider contrast dynamic range in the pulp flow, approximately 1.5–2 times than that of the np-LSCI system. The time contrast algorithm detected small velocity changes of 0.03–0.07 mm/s, and its detectability index was 5–10 times than the space contrast algorithm. The vp-LSCI system combined with time contrast algorithm greatly improves the ability of laser speckle to detect pulp blood flow and can detect a wider range of blood flow velocity and smaller changes of blood flow. It indicated that our system may be a promising tool for clinical assessment of pulp blood flow.