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Beam-shifting optical coherence tomography for speckle reduction and flow rate measurement
Author(s): Chaoliang Chen; Weisong Shi; Jamil Jivraj; Yuta Dobashi; Wanrong Gao; Victor X. D. Yang
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Paper Abstract

In this paper, beam-shifting optical coherence tomography (BSOCT) is presented for speckle reduction and flow rate measurement. The sample beam is rotated about the optical axis of the objective lens to modulate the incident angle on sample; 17 and 3 incident angles are respectively performed for speckle reduction and flow rate measurement. The performance of the proposed technique is investigated on both phantom and in vivo experiments. By combining a 2D micro-electro-mechanical system (MEMS) and a zigzag scanning protocol, the frame rates of 45.2 Hz for speckle reduction and 25.6 Hz for flow rate measurement are achieved. With beam-shifting angle of 4.76º, the speckle noise reduction of 91% and the flow rate measurement precision of 0.0019 μl/s are achieved.

Paper Details

Date Published: 20 November 2019
PDF: 8 pages
Proc. SPIE 11190, Optics in Health Care and Biomedical Optics IX, 111900W (20 November 2019); doi: 10.1117/12.2538105
Show Author Affiliations
Chaoliang Chen, Ryerson Univ. (Canada)
Weisong Shi, Ryerson Univ. (Canada)
Nanjing Univ. of Science and Technology (China)
Jamil Jivraj, Ryerson Univ. (Canada)
Yuta Dobashi, The Univ. of British Columbia (Canada)
Univ. of Toronto (Canada)
Wanrong Gao, Nanjing Univ. of Science and Technology (China)
Victor X. D. Yang, Ryerson Univ. (Canada)
Sunnybrook Health Sciences Ctr. (Canada)
Univ. of Toronto (Canada)


Published in SPIE Proceedings Vol. 11190:
Optics in Health Care and Biomedical Optics IX
Qingming Luo; Xingde Li; Ying Gu; Yuguo Tang; Dan Zhu, Editor(s)

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