Miniature structured illumination microscope for in vivo 3D imaging of brain structures with optical sectioning

• Main Authors: Bright, V.M (Author), Gibson, E.A (Author), Gopinath, J.T (Author), Hansen, S.R (Author), Hughes, E.G (Author), Martinez, G. (Author), Peet, G.C (Author), Peng, X. (Author), Restrepo, D. (Author), Shepherd, D.P (Author), Sias, A. (Author), Supekar, O.D (Author), Welle, C.G (Author)
• Format: Article
• Language: English
• Published: Optica Publishing Group (formerly OSA) 2022
• Subjects: 3D imaging; Brain structure; Electrowetting; Fluorescence microscopes; High resolution; Imaging systems; In-vivo; Light weight; Mammals; Microscopes; Optical sectioning; Structured illumination; Volumetric Imaging
• Online Access: View Fulltext in Publisher
• Physical Description: 12
• ISBN: 21567085 (ISSN)
• DOI: 10.1364/BOE.449533

We present a high-resolution miniature, light-weight fluorescence microscope with electrowetting lens and onboard CMOS for high resolution volumetric imaging and structured illumination for rejection of out-of-focus and scattered light. The miniature microscope (SIMscope3D) delivers structured light using a coherent fiber bundle to obtain optical sectioning with an axial resolution of 18 µm. Volumetric imaging of eGFP labeled cells in fixed mouse brain tissue at depths up to 260 µm is demonstrated. The functionality of SIMscope3D to provide background free 3D imaging is shown by recording time series of microglia dynamics in awake mice at depths up to 120 µm in the brain. © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement