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Evaluation of Ischemia Dynamics Focused by Recovery Time Constant and Its Application to Human Finger Tip
2009
Transactions of the Society of Instrument and Control Engineers
Pressing a blood vessel makes stopping natural flow of blood and brings into a change of color in surface of tissues from red to white. This phenomenon is called "ischemia". Such ischemia can be characterized by the time constant in the first order system. An issue in capturing the ischemia information is that the captured color includes two components, one comes from the blood itself and the other comes from the change of reflected condition due to the inclination of surface of tissue. This
doi:10.9746/sicetr.45.484
fatcat:fzvgfn7lfna2nmnhzuv63tsnyu