Multi-shaping technique reduces sidelobe magnitude in optical coherence tomography

Area of Science:

• Optical Engineering
• Biomedical Imaging
• Signal Processing

Background:

• Fourier-domain optical coherence tomography (FD-OCT) is a powerful imaging technique.
• Conventional shaping methods in FD-OCT suppress axial sidelobe artifacts but reduce axial resolution.
• This tradeoff limits image quality and accuracy in critical applications.

Purpose of the Study:

• To develop an advanced shaping technique for FD-OCT that overcomes the resolution-sidelobe tradeoff.
• To significantly reduce axial sidelobe magnitude while enhancing axial resolution.
• To provide a robust and compatible method for improving FD-OCT image quality.

Main Methods:

• Developed a novel multi-shaping technique for FD-OCT.
• Applied and tested the multi-shaping technique in three distinct experimental settings.
• Quantified reductions in axial sidelobe contribution and improvements in contrast-to-noise ratio.

Main Results:

• The multi-shaping technique dramatically reduced axial sidelobe magnitude by over 8 dB.
• Axial resolution was improved compared to conventional shaping methods.
• Contrast-to-noise ratio improved by at least 30% and up to three-fold.

Conclusions:

• Multi-shaping effectively suppresses axial sidelobe artifacts in FD-OCT without sacrificing axial resolution.
• This technique offers superior image quality and enhanced contrast-to-noise ratio.
• The robustness and compatibility of multi-shaping make it valuable for diverse OCT applications and accurate image analysis.