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High-resolution whole organ imaging using two-photon tissue cytometry.

Timothy Ragan¹, Jeremy D Sylvan, Ki Hean Kim

¹Massachusetts Institute of Technology, Division of Biological Engineering, Cambridge, Massachusetts 02139, USA. tragan@mit.edu

Journal of Biomedical Optics

|March 9, 2007

Summary

Three-dimensional (3-D) tissue imaging using two-photon tissue cytometry provides subcellular resolution of entire organs. This novel technique quantifies cardiac microvasculature and myocyte morphology in 3-D.

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Area of Science:

Biomedical imaging
Cellular and molecular biology
Cardiovascular research

Background:

Three-dimensional (3-D) tissue imaging is crucial for diverse biomedical fields, including cardiovascular biology, diabetes, Alzheimer's disease, and cancer research.
Existing imaging techniques face limitations in achieving subcellular resolution across entire organs.
Fluorescence-based imaging offers high specificity, sensitivity, and suitability for molecular imaging.

Purpose of the Study:

To introduce and demonstrate the application of two-photon tissue cytometry for high-resolution 3-D organ imaging.
To quantify the 3-D morphology of cardiac microvasculature and myocytes in an entire mouse heart.
To showcase the technique's capability in resolving structures across a wide range of length scales.

Main Methods:

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Utilized two-photon tissue cytometry, a novel technique combining high-speed multiphoton microscopy with automated histological sectioning.
Performed 3-D imaging of an entire mouse heart.
Quantified tissue morphology and physiology with subcellular resolution.

Main Results:

Achieved subcellular resolution imaging of an entire mouse heart.
Successfully quantified the 3-D morphology of cardiac microvasculature.
Quantified myocyte morphology across nearly five orders of magnitude in length scales.

Conclusions:

Two-photon tissue cytometry is a powerful technique for comprehensive 3-D organ analysis at subcellular resolution.
The method enables detailed quantification of microvasculature and cellular morphology in complex tissues.
This approach holds significant potential for advancing biomedical investigations across various disciplines.