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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Updated: Nov 21, 2025

Three-dimensional Optical-resolution Photoacoustic Microscopy
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Optical resolution photoacoustic computed microscopy.

Weizhi Qi, Xiao Liang, Yaoyao Ji

    Optics Letters
    |January 15, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Optical resolution photoacoustic computed microscopy (ORPACM) enhances sensitivity for imaging biologic tissues. This new method improves visualization of microvascular networks by combining laser scanning with an ultrasonic transducer array.

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    Area of Science:

    • Biomedical Optics
    • Medical Imaging
    • Photoacoustics

    Background:

    • Optical resolution photoacoustic microscopy (ORPAM) offers high-resolution, high-contrast imaging of biological tissues.
    • Sensitivity limitations in ORPAM hinder the detailed visualization of microvascular networks.

    Purpose of the Study:

    • To introduce and evaluate a novel ORPAM modality: optical resolution photoacoustic computed microscopy (ORPACM).
    • To address the sensitivity challenges in ORPAM for improved microvascular imaging.

    Main Methods:

    • ORPACM integrates a 2D laser-scanning system with a medical ultrasonographic platform.
    • Multiple photoacoustic (PA) signals are acquired using a 128-element ultrasonic transducer array per pulse.
    • A reconstruction algorithm is employed to generate depth-resolved PA signals (A-lines).

    Main Results:

    • ORPACM provides more detailed information compared to conventional single-element transducer ORPAM.
    • In vitro and in vivo experiments demonstrate the advanced capabilities of ORPACM.
    • Quantitative analyses confirm the enhanced performance of the proposed modality.

    Conclusions:

    • ORPACM represents a significant advancement in photoacoustic microscopy.
    • The developed technique offers improved sensitivity and resolution for imaging biological structures.
    • ORPACM holds promise for detailed visualization of microvascular networks in biological tissues.