What are the axial length resolutions for spectral domain and time 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 are the axial length resolutions for spectral domain and time domain OCT?

Explanation:
Axial resolution in OCT is set by the light’s coherence length, which gets shorter as the source bandwidth increases. Spectral-domain OCT uses a broad spectrum detected with a spectrometer and processed with a Fourier transform, allowing very broad bandwidth sources to be utilized. This gives finer depth discrimination, typically around 3–7 microns. Time-domain OCT relies on scanning the reference arm with a comparatively narrower bandwidth source, so its axial resolution is poorer, usually about 8–10 microns. So the statement that spectral-domain is about 3–7 microns and time-domain about 8–10 microns reflects their typical performance.

Axial resolution in OCT is set by the light’s coherence length, which gets shorter as the source bandwidth increases. Spectral-domain OCT uses a broad spectrum detected with a spectrometer and processed with a Fourier transform, allowing very broad bandwidth sources to be utilized. This gives finer depth discrimination, typically around 3–7 microns. Time-domain OCT relies on scanning the reference arm with a comparatively narrower bandwidth source, so its axial resolution is poorer, usually about 8–10 microns. So the statement that spectral-domain is about 3–7 microns and time-domain about 8–10 microns reflects their typical performance.

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