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. Author manuscript; available in PMC: 2008 Jul 7.
Published in final edited form as: J Biomed Opt. 2007;12(5):051604. doi: 10.1117/1.2801718

Fig. 1.

Fig. 1

(a) Schematic of the original NIR multispectral imaging system. The filter wheel in front of the CCD camera contains six filters of 700, 750, 800, 850, 900, and 1000 nm. (b) Schematic of upgraded NIR spectroscopy system. The light source is projected directly in front of the CCD camera so that the light shines perpendicular to the object surface.