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Optical diagnostics of tissue pathology by multiphoton microscopy
Chen Yuan Dong1, Paul J Campagnola
1National Taiwan University, Physics, 1 Sec. 4 Roosevelt Rd, Taipei 106, Taiwan cydong@phys.ntu.edu.tw.
Expert Opinion on Medical Diagnostics
|March 19, 2013
Summary
Nonlinear optical microscopy techniques like multiphoton fluorescence, second harmonic generation (SHG), and third harmonic generation (THG) enable label-free imaging of pathological tissues. These advanced methods offer high-contrast, 3D visualization for disease diagnosis.
Area of Science:
- Nonlinear optics
- Biomedical imaging
- Pathology diagnostics
Background:
- Multiphoton microscopy offers advanced 3D tissue imaging with intrinsic optical sectioning, reduced photodamage, and deeper penetration.
- Second Harmonic Generation (SHG) visualizes non-centrosymmetric structures like collagen without extrinsic labels.
- Third Harmonic Generation (THG) provides contrast for imaging tissue morphology, complementing autofluorescence.
Purpose of the Study:
- To review the principles and instrumentation of multiphoton microscopy techniques.
- To illustrate the application of these techniques in diagnosing various tissue pathologies.
- To discuss advancements in miniaturized and endoscopic instrumentation for real-time diagnosis.
Main Methods:
- Discussion of physical principles of multiphoton fluorescence, SHG, and THG.
- Presentation of multiphoton microscope setup and recent instrumentation advances.
- Illustration of tissue pathology imaging in organs like skin, cornea, lung, and liver.
Main Results:
- Readers will understand multiphoton microscopy principles and instrument construction.
- Appreciation for the technique's utility in diagnosing pathological tissues.
- Insights into future developments and applications of multiphoton microscopy.
Conclusions:
- Intrinsic fluorescence and harmonic generation signals differentiate normal from pathological epithelial tissues.
- Technical advancements in imaging depth, multimodal capabilities, and endoscopic tools are crucial.
- These developments may lead to effective clinical diagnostics for selected epithelial tissues.
