NDLI: Mapped hemodynamic data acquisition by near infrared CCD imaging

Content Provider	IEEE Xplore Digital Library
Author	Such, O. Acker, S. Blazek, V.
Copyright Year	1997
Description	Author affiliation: Inst. of High Frequency Technol., Aachen Univ. of Technol., Germany (Such, O.)
Abstract	This paper presents undergoing research results of a near infrared CCD imaging system designed for mapped acquisition of hemodynamics data with inexpensive system components. This system is intended for use by clinicians and in phenological practice. The tests that can currently be done with this system are the classical Muscle Pump Test (MPT) and the Vein Occlusion Test (VOT). These are standard tests for venous disorders such as chronic vein insufficiency (CVI) and deep vein thrombosis (DVT). Photoplethysmographic (PPG) systems with NIR optical sensors are in wide use for these tests today. They essentially measure the blood volume changes in the top skin layers by registering the attenuation change in the near infrared. The new principle is based on this method but allows imaging of the vein structure as well as mapping the physiological data to the image. A monochrome CCD camera equipped with a >700 nm filter is mounted on a tripod. A diffuse illumination is applied, then the test is performed. The camera takes a sequence of pictures of the perfusion area of interest, usually the lower leg. The sequence is then evaluated and filtered with digital filter algorithms. This allows calculation of parameters such as venous refilling time, venous pump power and venous drainage. These values are offered to the examiner as mapped data from several selectable regions. From this, conclusions can be taken as to the reason and location of disorders.
Starting Page	637
Ending Page	639
File Size	324479
Page Count	3
File Format	PDF
ISBN	0780342623
ISSN	1094687X
DOI	10.1109/IEMBS.1997.757694
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hemodynamics Data acquisition Infrared imaging Charge coupled devices Optical imaging System testing Veins Digital filters Muscles Optical sensors
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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