NDLI: Four-wavelength near-infrared imaging of abdominal aorta blood flow under surgical occlusion

Content Provider	IEEE Xplore Digital Library
Author	Lau, W.W. Mozaffari-Naeini, H. Thakor, N.V.
Copyright Year	2004
Description	Author affiliation: Dept. of Biomedical Eng., Johns Hopkins Univ., Baltimore, MD, USA (Lau, W.W.; Mozaffari-Naeini, H.; Thakor, N.V.)
Abstract	This paper presents a four-wavelength near-infrared imaging system that can assist surgeons with intraoperative monitoring and imaging of blood flow of the vessel being occluded. The algorithm for this system, based on the Beer-Lambert law, calculates the relative concentrations of deoxyhemoglobin, oxyhemoglobin and water, which are the major NIR absorbers in tissues. Regional blood volume and oxygen saturation can be determined from these measurements. This proof-of-concept study investigated the utility of the algorithm on detecting rat infrarenal abdominal aortic blood flow subjected to various degrees of occlusion. The images provided a good visualization of the aorta because of the high concentration of oxyhemoglobin in the blood stream. The imager was able to detect when blood flow was completely stopped. Average intensity values of the blood volume images correlated well with the laser Doppler recordings.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Computational Medicine Texas Tech Univ. College of Eng
Starting Page	373
Ending Page	378
File Size	461320
Page Count	6
File Format	PDF
ISBN	0769521045
ISSN	10637125
DOI	10.1109/CBMS.2004.1311742
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Abdomen Biomedical imaging Blood flow Laser surgery Visualization Probes Animals Biomedical engineering Biomedical monitoring Biomedical measurements
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging Computer Science Applications

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