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Advanced microscopy techniques are essential in biomedical research for visualising and tracking biomolecules within living cells and their compartments. Conventional fluorescence microscopy methods, however, often struggle with accurately…

Kernel phase interferometry (KPI) is a data processing technique that allows for the detection of asymmetries (such as companions or disks) in high-Strehl images, close to and within the classical diffraction limit. We show that KPI can…

Instrumentation and Methods for Astrophysics · Physics 2023-05-29 Alexander Chaushev , Steph Sallum , Julien Lozi , Frantz Martinache , Jeffrey Chilcote , Tyler Groff , Olivier Guyon , N. Jeremy Kasdin , Barnaby Norris , Andy Skemer

Understanding transcription factor dynamics is crucial for unraveling the regulatory mechanisms of gene expression that underpin cellular function and development. Measurements of transcription factor subcellular movements are essential for…

Quantitative Methods · Quantitative Biology 2025-03-20 Sharva V. Hiremath , Etika Goyal , Gregory T. Reeves , Cranos M. Williams

Real-time PCR, or Real-time Quantitative PCR (qPCR) is an effective approach to quantify nucleic acid samples. Given the complicated reaction system along with thermal cycles, there has been long-term confusion on accurately calculating the…

Quantitative Methods · Quantitative Biology 2021-03-02 Chuanbo Liu , Jin Wang

We describe a compression method for floating-point astronomical images that gives compression ratios of 6 -- 10 while still preserving the scientifically important information in the image. The pixel values are first preprocessed by…

Instrumentation and Methods for Astrophysics · Physics 2010-09-10 W. D. Pence , R. L. White , R. Seaman

We report the cell biological applications of a recently developed multiphoton fluorescence lifetime imaging microscopy system using a streak camera (StreakFLIM). The system was calibrated with standard fluorophore specimens and was shown…

Cell Behavior · Quantitative Biology 2009-11-10 R. V. Krishnan , Eva Biener , Jian-Hua Zhang , Robert Heckel , Brian Herman

In this paper, we review spatial light interference microscopy (SLIM), a common-path, phase-shifting interferometer, built onto a phase-contrast microscope, with white-light illumination. As one of the most sensitive quantitative phase…

Optics · Physics 2020-12-17 Xi Chen , Mikhail E. Kandel , Gabriel Popescu

In this work, we present a highly efficient quantitative phase imaging (QPI) approach using programmable annular LED illumination based on traditional bright-field microscope. As a new type of coded illumination, the LED array provides a…

Optics · Physics 2017-07-14 Jiaji Li , Qian Chen , Jialin Zhang , Yan Zhang , Linpeng Lu , Chao Zuo

FRET measurements can provide dynamic spatial information on length scales smaller than the diffraction limit of light. Several methods exist to measure FRET between fluorophores, including Fluorescence Lifetime Imaging Microscopy (FLIM),…

Quantitative Methods · Quantitative Biology 2017-01-09 Bryan Kaye , Peter J. Foster , Tae Yeon Yoo , Daniel J. Needleman

Quantitative phase imaging (QPI) through multi-core fibers (MCFs) has been an emerging in vivo label-free endoscopic imaging modality with minimal invasiveness. However, the computational demands of conventional iterative phase retrieval…

Image simulation remains under-exploited for the most widely used biological phase microscopy methods, because of difficulties in simulating partially coherent illumination. We describe an open-source toolbox, microlith…

Optics · Physics 2014-05-14 Shalin B. Mehta , Rudolf Oldenbourg

Computational imaging methods empower modern microscopy with the ability of producing high-resolution, large field-of-view, aberration-free images. One of the dominant computational label-free imaging methods, Fourier ptychographic…

Optics · Physics 2023-09-06 Ruizhi Cao , Cheng Shen , Changhuei Yang

Scanning tunneling microscopy (STM) is a notoriously slow technique; Data-recording is serial which renders complex measurement tasks, such as quasiparticle interference (QPI) mapping, impractical. However, QPI would provide insight into…

Other Condensed Matter · Physics 2020-05-06 Jens Oppliger , Fabian Donat Natterer

Using a deep neural network, we demonstrate a digital staining technique, which we term PhaseStain, to transform quantitative phase images (QPI) of labelfree tissue sections into images that are equivalent to brightfield microscopy images…

Image and Video Processing · Electrical Eng. & Systems 2019-02-08 Yair Rivenson , Tairan Liu , Zhensong Wei , Yibo Zhang , Aydogan Ozcan

Photonic integrated circuits (PICs) play a pivotal role in many applications. Particularly powerful are circuits based on meshes of reconfigurable Mach-Zehnder interferometers as they enable active processing of light. Various possibilities…

Investigation of cell structure is hardly imaginable without bright-field microscopy. Numerous modifications such as depth-wise scanning or videoenhancement make this method being state-of-the-art. This raises a question what maximal…

Image and Video Processing · Electrical Eng. & Systems 2020-10-29 Kirill Lonhus , Renata Rychtarikova , Ganna Platonova , Dalibor Stys

ChIP-seq, which combines chromatin immunoprecipitation with massively parallel short-read sequencing, can profile in vivo genome-wide transcription factor-DNA association with higher sensitivity, specificity and spatial resolution than…

Genomics · Quantitative Biology 2009-03-19 Xuekui Zhang , Gordon Robertson , Martin Krzywinski , Kaida Ning , Arnaud Droit , Steven Jones , Raphael Gottardo

We introduce the white light quantitative phase imaging unit (WQPIU) as a practical realization of quantitative phase imaging (QPI) on standard microscope platforms. The WQPIU is a compact stand-alone unit which measures sample induced…

Optics · Physics 2016-05-04 YoonSeok Baek , KyeoReh Lee , Jonghee Yoon , Kyoohyun Kim , YongKeun Park

In a research context, image acquisition will often involve a pre-defined static protocol and the data will be of high quality. If we are to build applications that work in hospitals without significant operational changes in care delivery,…

Computer Vision and Pattern Recognition · Computer Science 2018-07-18 Thomas Varsavsky , Zach Eaton-Rosen , Carole H. Sudre , Parashkev Nachev , M. Jorge Cardoso

Label-free imaging of rapidly moving, sub-diffraction sized structures has important applications in both biology and material science, as it removes the limitations associated with fluorescence tagging. However, unlabeled nanoscale…