Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system
Full field laser Doppler imaging (LDI) and single exposure laser speckle contrast imaging (LSCI) are directly compared using a novel instrument which can concurrently image blood flow using both LDI and LSCI signal processing. Incorporating a commercial CMOS camera chip and a field programmable gate...
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| Format: | Article |
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/34459/ |
| _version_ | 1848794858386358272 |
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| author | Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Huynh, Nam T. Morgan, Stephen P. |
| author_facet | Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Huynh, Nam T. Morgan, Stephen P. |
| author_sort | Sun, Shen |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Full field laser Doppler imaging (LDI) and single exposure laser speckle contrast imaging (LSCI) are directly compared using a novel instrument which can concurrently image blood flow using both LDI and LSCI signal processing. Incorporating a commercial CMOS camera chip and a field programmable gate array (FPGA) the flow images of LDI and the contrast maps of LSCI are simultaneously processed by utilizing the same detected optical signals. The comparison was carried out by imaging a rotating diffuser. LDI has a linear response to the velocity. In contrast, LSCI is exposure time dependent and does not provide a linear response in the presence of static speckle. It is also demonstrated that the relationship between LDI and LSCI can be related through a power law which depends on the exposure time of LSCI. |
| first_indexed | 2025-11-14T19:22:52Z |
| format | Article |
| id | nottingham-34459 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:22:52Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-344592020-05-04T20:01:50Z https://eprints.nottingham.ac.uk/34459/ Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Huynh, Nam T. Morgan, Stephen P. Full field laser Doppler imaging (LDI) and single exposure laser speckle contrast imaging (LSCI) are directly compared using a novel instrument which can concurrently image blood flow using both LDI and LSCI signal processing. Incorporating a commercial CMOS camera chip and a field programmable gate array (FPGA) the flow images of LDI and the contrast maps of LSCI are simultaneously processed by utilizing the same detected optical signals. The comparison was carried out by imaging a rotating diffuser. LDI has a linear response to the velocity. In contrast, LSCI is exposure time dependent and does not provide a linear response in the presence of static speckle. It is also demonstrated that the relationship between LDI and LSCI can be related through a power law which depends on the exposure time of LSCI. Elsevier 2016-08 Article PeerReviewed Sun, Shen, Hayes-Gill, Barrie R., He, Diwei, Zhu, Yiqun, Huynh, Nam T. and Morgan, Stephen P. (2016) Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system. Optics and Lasers in Engineering, 83 . pp. 1-9. ISSN 0143-8166 Laser Doppler; Laser speckle contrast; Blood flow imaging; CMOS Sensor; Field programmable gate array http://www.sciencedirect.com/science/article/pii/S0143816616000592 doi:10.1016/j.optlaseng.2016.02.021 doi:10.1016/j.optlaseng.2016.02.021 |
| spellingShingle | Laser Doppler; Laser speckle contrast; Blood flow imaging; CMOS Sensor; Field programmable gate array Sun, Shen Hayes-Gill, Barrie R. He, Diwei Zhu, Yiqun Huynh, Nam T. Morgan, Stephen P. Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title | Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title_full | Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title_fullStr | Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title_full_unstemmed | Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title_short | Comparison of laser Doppler and laser speckle contrast imaging using a concurrent processing system |
| title_sort | comparison of laser doppler and laser speckle contrast imaging using a concurrent processing system |
| topic | Laser Doppler; Laser speckle contrast; Blood flow imaging; CMOS Sensor; Field programmable gate array |
| url | https://eprints.nottingham.ac.uk/34459/ https://eprints.nottingham.ac.uk/34459/ https://eprints.nottingham.ac.uk/34459/ |