(A) confocal/bright-field/spectral imaging system (B) fluorescence lifetime imaging system. M: mirror, DM: dichroic mirror, AOTF: Acousto-optic tunable filters, L: tube lens, A: aperture, ES: light wavelength selector, PMT: photomultiplier tube, ΔT: delta T chamber, PL: polarizer, BS: beam sampler, PD: photodiode detector, FR: faraday rotator, L1, 2: doublet lens (focal lens: 15mm), BBO: beta barium borate crystal, F1: excitation filter (425±5nm), F2: emission filter (610nm±60nm), O: objective, TGI: time-gated intensifier, and CCD: charge-coupled detector. This figure was modified from the experimental setup reported previously [Jae Youn Hwang et al., submitted for publication].