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    Rotating Coherent Scattering (ROCS) microscopy achieves 145nm resolution using a novel amplitude mask. This label-free technique enhances contrast and resolution for live cell imaging without complex reconstructions.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Microscopy

    Background:

    • Modern light microscopy aims for higher resolution and user-friendly systems.
    • Label-free imaging methods are crucial for live cell experiments.
    • Rotating Coherent Scattering (ROCS) microscopy offers high contrast and resolution.

    Purpose of the Study:

    • To demonstrate a method for achieving 145nm resolution using ROCS microscopy.
    • To improve spatial filtering in darkfield ROCS microscopy.
    • To explore angular correlation analysis for information content estimation.

    Main Methods:

    • Utilized an amplitude transmission mask for spatial filtering in darkfield ROCS microscopy.
    • The mask blocked the 0-th order focus at 12 positions to increase effective aperture.
    • Employed angular correlation analysis on coherent raw images.

    Main Results:

    • Achieved a spatial resolution of 145nm.
    • Demonstrated enhanced contrast and resolution without image reconstruction.
    • Showcased the effectiveness of the amplitude mask in ROCS microscopy.

    Conclusions:

    • The developed amplitude mask significantly enhances resolution in ROCS microscopy.
    • ROCS microscopy with spatial filtering is a powerful tool for high-resolution live cell imaging.
    • Angular correlation analysis provides insights into image information content.