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Updated: Feb 13, 2026
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Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
Published on: April 28, 2022
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Coherent anti-Stokes Raman scattering rigid endoscope toward robot-assisted surgery
K Hirose1, T Aoki1, T Furukawa2
1Graduate School of Engineering Science, Osaka University, Osaka, Japan.
Biomedical Optics Express
|March 20, 2018
Summary
A new coherent anti-Stokes Raman scattering (CARS) endoscope enables label-free nerve visualization during surgery. This technology aids surgeons in preserving neurological function by distinguishing nerves from surrounding tissues.
Area of Science:
- Biomedical Engineering
- Surgical Technology
- Microscopy
Background:
- Preserving neurological function is critical in nerve-sparing surgeries.
- Current methods for intraoperative nerve identification can be challenging.
- Label-free imaging offers a promising approach to overcome these limitations.
Purpose of the Study:
- To develop and evaluate a coherent anti-Stokes Raman scattering (CARS) rigid endoscope for real-time, label-free nerve visualization.
- To assess the performance of the endoscope in distinguishing nerves from other tissues during simulated surgical conditions.
Main Methods:
- Development of a CARS rigid endoscope (12 mm diameter, 270 mm length).
- Characterization of the endoscope's optical performance, including image distortion and intensity non-uniformity.
- In vivo demonstration of CARS imaging on a rat sciatic nerve model.
Main Results:
- The developed CARS endoscope achieved low image distortion (0.91%) and non-uniformity (8.6%).
- Successful visualization of a rat sciatic nerve was demonstrated.
- The fine structure of nerve fibers was clearly depicted using CARS imaging.
Conclusions:
- The CARS rigid endoscope provides effective label-free visualization of nerves.
- This technology has the potential to significantly improve nerve identification and preservation in robot-assisted surgery.
- Further development could lead to enhanced surgical outcomes and reduced neurological deficits.
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