title: Spectrally resolved multidepth fluorescence imaging.
abstract: We present a multicolor fluorescence imaging modality to visualize in real-time tissue structures emitting multispectral fluorescent light from different focal depths. Each designated spectrum of fluorescent emission from a specific depth within a volumetric tissue is probed by a depth-spectrum selective holographic grating. The grating for each fluorescent color are multiplexed within a volume hologram, which enables simultaneously obtaining multicolored fluorescent information at different depths within a biological tissue sample. We demonstrate the imaging modality's ability to obtain laser-induced multicolored fluorescence images of a biological sample from different depths without scanning. We also experimentally demonstrate that the imaging modality can be simultaneously operated at both fluorescent and bright field modes to provide complementary information of volumetric tissue structures at different depths in real-time.
authors.affiliation: Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts 02139, USA.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Luo
authors.forename: Ioannis K
authors.initials: IK
authors.lastname: Zervantonakis
authors.forename: Se Baek
authors.initials: SB
authors.lastname: Oh
authors.forename: Roger D
authors.initials: RD
authors.lastname: Kamm
authors.forename: George
authors.initials: G
authors.lastname: Barbastathis
mesh_terms: D001943:Breast Neoplasms; D003584:Cytological Techniques; D004867:Equipment Design; D005260:Female; D006696:Holography / Q000379:methods*; D006801:Humans; D008856:Microscopy, Fluorescence / Q000379:methods*; D019047:Phantoms, Imaging; D045663:Quantum Dots; D012815:Signal Processing, Computer-Assisted