What is the wavelength used by spectral domain OCT?

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Enhance your knowledge in Optical Coherence Tomography (OCT) C Fundamentals. Study with targeted flashcards and multiple-choice questions, each providing hints and detailed explanations. Boost your confidence and be ready for your exam!

Multiple Choice

What is the wavelength used by spectral domain OCT?

Explanation:
Near-infrared light around 840 nm is used in spectral-domain OCT. This wavelength region offers a good balance between tissue penetration and detector/optics efficiency, allowing clear imaging of retinal and deeper ocular structures while maintaining high resolution. Visible wavelengths (550–680 nm) scatter more in tissue and don’t penetrate as well, and while 780 nm is also near-IR, 840 nm is the standard choice because it provides deeper penetration with compatible optical components and detectors.

Near-infrared light around 840 nm is used in spectral-domain OCT. This wavelength region offers a good balance between tissue penetration and detector/optics efficiency, allowing clear imaging of retinal and deeper ocular structures while maintaining high resolution. Visible wavelengths (550–680 nm) scatter more in tissue and don’t penetrate as well, and while 780 nm is also near-IR, 840 nm is the standard choice because it provides deeper penetration with compatible optical components and detectors.

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