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. Author manuscript; available in PMC: 2008 Apr 1.
Published in final edited form as: Surg Oncol Clin N Am. 2007 Apr;16(2):307–321. doi: 10.1016/j.soc.2007.03.008

Fig.1.

Fig.1

In vitro absorption spectra of hemoglobin and water, showing a spectral window in tissue in the NIR. The window is brought about by first a decrease in blood (oxy- and deoxyhemoglobin) absorption and then an increase in water absorption with increasing wavelength.