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. Author manuscript; available in PMC: 2011 Oct 31.
Published in final edited form as: IEEE J Quantum Electron. 2010;16(3):555–564. doi: 10.1109/JSTQE.2009.2034615

Fig. 1.

Fig. 1

Virtual reflectance probe. Circles indicate the positions of detectors and solid dots indicate the positions of the sources. The source–detector separations ranged from 1.3 to 4 cm.