CMOS sensors for imaging blood flow

Morgan, Steve; Hayes-Gill, Barrie; Crowe, John

Abstract

Smart CMOS sensors can extract parameters of interest from incoming signals at the sensor and therefore overcome the data bottleneck between sensor and processor. This enables full-field laser Doppler blood flow imaging to be obtained at a frame rate in which effects due to motion artifacts are significantly reduced and will allow clinical applications that involve changes in blood flow to be imaged. Smart CMOS sensors are custom-made arrays of photodetectors with on-chip processing. A customized camera can provide several advantages over commercial cameras because the specifications can be tailored to the detected signals. Pixel size, current-to-voltage conversion gain and the number of digitization bits can all be designed to be the most appropriate for laser Doppler imaging. The Doppler signal is detected by a photodetector coupled to a current-to-voltage converter with a linear response. The size of the signal that returns from the tissue depends on the DC light level and so is normalized.

Citation

Morgan, S., Hayes-Gill, B., & Crowe, J. (2010). CMOS sensors for imaging blood flow. Optics and Photonics News, 21(1), 32-37. https://doi.org/10.1364/OPN.21.1.000032

• Journal Article Type: Article
• Publication Date: Jan 1, 2010
• Deposit Date: Mar 25, 2021
• Journal: Optics and Photonics News
• Print ISSN: 1047-6938
• Publisher: Optical Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 21
• Issue: 1
• Pages: 32-37
• DOI: https://doi.org/10.1364/OPN.21.1.000032
• Public URL: https://nottingham-repository.worktribe.com/output/3210571
• Publisher URL: https://www.osapublishing.org/opn/abstract.cfm?uri=opn-21-1-32