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Effectiveness of Digital Dispersion Compensation in OCT
Fengquan Liu1, Xingde Li1,2
1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, USA.
Biorxiv : the Preprint Server for Biology
|March 17, 2025
Summary
Digital dispersion compensation in optical coherence tomography (OCT) can restore detection sensitivity but fails beyond a certain dispersion mismatch threshold, degrading image quality.
Area of Science:
- Biomedical Optics
- Medical Imaging Technology
Background:
- Dispersion mismatch in optical coherence tomography (OCT) affects imaging quality.
- Current compensation methods include physical and digital approaches.
Purpose of the Study:
- To investigate the impact of dispersion mismatch on OCT detection sensitivity.
- To compare the effectiveness of physical and digital compensation methods.
- To determine the limitations of digital compensation for severe dispersion mismatches.
Main Methods:
- Simulating varying degrees of dispersion mismatch in OCT.
- Evaluating detection sensitivity with and without compensation.
- Comparing digital and physical compensation strategies.
Main Results:
- Digital dispersion compensation effectively restores OCT detection sensitivity for mild to moderate mismatches.
- The efficacy of digital compensation is limited by the severity of the dispersion mismatch.
- Severe dispersion mismatches result in incomplete recovery of image information and degraded image quality, even with digital compensation.
Conclusions:
- Digital compensation is a viable method for mitigating dispersion effects in OCT within certain limits.
- Exceeding the dispersion mismatch threshold significantly impairs the effectiveness of digital compensation.
- Further advancements are needed to address severe dispersion mismatches in OCT imaging.
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