Laboratory of High Resolution Optical Imaging (HROI)

The Laboratory of High Resolution Optical Imaging (HROI) develops novel technologies for studying biological processes at unprecedented speed and resolution. Research includes improving the performance of 3D optical imaging microscopes, particularly with respect to resolution and depth (e.g. multifocal structured illumination microscopy, MSIM) and speed and phototoxicity (e.g. inverted selective plane illumination microscopy, iSPIM). We collaborate closely with intra- and extramural researchers (both academic and commercial) to ensure that our microscopes are both easily and widely used. Along with researchers at Sloan-Kettering (Zhirong Bao) and Yale University (Daniel Colon-Ramos), we are using one of our technologies (iSPIM) to construct the first atlas of 4D neurodevelopment in an animal.
Hari Shroff lab group photo
Photo: C. Chang for NIBIB.


Furthering development of superresolution optical imaging techniques, particularly 3-D structured illumination microscopy(SIM)

Thi is a picutre of fluorescently labeled microtubules fixed in a cell. The microtubules are less than 150 nm.

Structured illumination microscopy techniques use patterned excitation light and post-processing to double the resolution of a conventional microscope. Unlike other super-resolution techniques, they provide resolution enhancement at a relatively low illumination dose, thus enabling high resolution imaging over tens – hundreds of volumes. Previous implementations of SIM were limited to samples of < 10 um, but we have developed a multifocal version (MSIM)1 that permits resolution-doubling at depths exceeding 50 um. Most recently, we have extended the speed of MSIM 100x, facilitating super-resolution imaging at hundreds of frames per second.1

Improving the usability and resolution of selective plane illumination microscopy (SPIM)

This is a picture of GFP-histones in a live nematode embryo.  It shows both a top and bottom view of the embryo.

Selective plane illumination microscopy techniques combine a perpendicular excitation/detection geometry with light-sheet excitation, drastically reducing photobleaching and damage while providing higher signal-to-noise ratio and acquisition rates than confocal microscopy. Nevertheless, widespread adoption of SPIM has been slow because (1) the geometry is cumbersome, usually requiring special sample preparation; (2) Axial resolution is usually 3x worse than confocal microscopy. To address the usability issue, we have developed inverted selective plane illumination microscopy (iSPIM)2, a module that can be mounted onto an epifluorescence microscope, thus allowing conventional sample mounting on glass coverslips while retaining the advantages of SPIM. iSPIM offers an approximate 30-fold improvement over spinning disk confocal microscopy in terms of acquisition speed, photobleaching, and total acquisition length when imaging live samples. We have recently developed a variation of iSPIM that enables isotropic imaging with 330 nm spatial resolution (~4x better axial resolution than previous implementations) and temporal resolution down to 3 ms.

Construction of a 4-dimensional digital atlas of neuronal development in C. Elegans in collaboration with researchers at Yale University and Memorial Sloan-Kettering Cancer Center

Along with extramural neuroscientists, scientists, and developmental biologists, we are using iSPIM to follow all neurons in the developing nematode embryo. We intend to create the first digital atlas of neurodevelopment. Further information on this project may be obtained at

1. Resolution doubling in live, multicellular organisms via multifocal structured illumination microscopy. York AG, Parekh SH, Dalle Nogare D, Fischer RS, Temprine K, Mione M, Chitnis AB, Combs CA, Shroff H. Nat Methods. 2012 May 13;9(7):749-54. doi: 10.1038/nmeth.2025.

2. Inverted selective plane illumination microscopy (iSPIM) enables coupled cell identity lineaging and neurodevelopmental imaging in Caenorhabditis elegans. Wu Y, Ghitani A, Christensen R, Santella A, Du Z, Rondeau G, Bao Z, Colón-Ramos D, Shroff H. Proc Natl Acad Sci U S A. 2011 Oct 25;108(43):17708-13. doi: 10.1073/pnas.1108494108. Epub 2011 Oct 17.

This is an image of the laser configuration in the Section for High Resolution Optical Imaging

The Shroff lab currently houses:

  • A photoactivated localization microscope (PALM) for 3D super-resolution (25-50 nm in XY and 100 nm in z).
  • A multifocal structured illumination microscope with 150 nm lateral, 350 nm axial resolution and a time resolution of 5 ms.
  • Two selective plane illumination microscopes, with isotropic spatial resolution down to 330 nm and temporal resolution of 5 ms.
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Nano Lett
2020 Nov 30

Chandler TShroff HOldenbourg RLa Rivière P
J Opt Soc Am A Opt Image Sci Vis
2020 Sep 01

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Nat Biotechnol
2020 Nov

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Mol Cell
2020 Jun 04

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Nat Commun
2020 Jan 23

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2020 Jan 07

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2019 Oct 22

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2018 Jun

Zhu GLynn GMJacobson OChen KLiu YZhang HMa YZhang FTian RNi QCheng SWang ZLu NYung BCWang ZLang LFu XJin AWeiss IDVishwasrao HNiu GShroff HKlinman DMSeder RAChen X
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2017 Dec 05

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2017 Nov 14

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2017 Nov 13

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PLoS Pathog
2016 Dec

Wu YChandris PWinter PWKim EYJaumouillé VKumar AGuo MLeung JMSmith CRey-Suarez ILiu HWaterman CMRamamurthi KSLa Riviere PJShroff H
2016 Aug 20

Kumar AChristensen RGuo MChandris PDuncan WWu YSantella AMoyle MWinter PWColón-Ramos DBao ZShroff H
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2016 Aug

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2016 Jul 01

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