2 This means that spectral-domain OCT has a much faster scan speed (at least 20,000 A-scans per second) than time-domain OCT (up to 400 A-scans per second for the Stratus OCT, Carl Zeiss Meditec, Inc.). The interference spectrum data is detected by a spectrometer and Fourier transformed to generate axial measurements. By contrast, the reference mirror in spectral-domain OCT is stationary. Time-domain OCT operates by using a moving reference mirror to measure the consecutive sequence of echo time delays. Based on the principle of low-coherence interferometry, OCT measures the intensity of backscattered infrared light. Since 1991, 1 OCT has undergone rapid evolution for use in detection and monitoring of glaucoma and macular diseases. Optical coherence tomography (OCT) is a non-contact optical technique that allows imaging and measurement of the retinal nerve fiber layer (RNFL).
Spectral-domain optical coherence tomography (OCT), retinal nerve fiber layer (RNFL), Cirrus HD-OCT, RNFL thickness map, RNFL thickness deviation map, glaucoma progression, RNFL progression, retinal nerve fiber layer cohesion, glaucoma treatment, regression, spectral domain oct imaging, zeiss cirrus hd oct, Article: RNFL measurement with spectral-domain OCT could provide important information for use in formulating treatment plans and evaluating disease prognosis in the management of glaucoma. Trend analysis of average and sectorial RNFL thicknesses, and event analysis of the RNFL thickness maps and the RNFL thickness profiles can be used to detect and follow diffuse and focal RNFL progression. Analysis of the RNFL thickness deviation map-a color-coded map displaying areas of RNFL abnormalities-detects glaucoma with high sensitivity and specificity. Dublin, CA) is a spectral-domain OCT that provides visualization of the distribution pattern and measurement of RNFL abnormalities in a 6圆mm2 optic disc region. The Cirrus HD-OCT (Carl Zeiss Meditec, Inc. High-speed, high-resolution imaging of the retinal nerve fiber layer (RNFL) with spectral-domain optical coherence tomography (OCT) has become an essential tool for evaluation of glaucoma.
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