Spectral Domain Oct Wiki

Due to the fourier relation wiener khintchine theorem between the auto correlation and the spectral power density the depth scan can be immediately calculated by a fourier transform from the acquired spectra without movement of the reference arm. That means spectral domain doppler oct does not need to compromise between velocity resolution and spatial resolution. Con gli attuali spectral domain sd oct si ottengono scansioni maculari ad alta risoluzione estremamente dettagliate che consentono di analizzare quasi istologicamente l interfaccia vitreo retinica gli strati retinici dalle fibre nervose ai fotorecettori l epitelio pigmentato retinico e la coroide.

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Diagnosis of glaucoma and detection of glaucoma progression using spectral domain optical coherence tomography.

Spectral domain oct wiki. Spectral domain optical coherence tomography in the diagnosis and management of glaucoma. A spectral domain oct uses a dispersive detector like a grating and a linear detector array to separate the different wavelengths. As mentioned in section 10 2 1 1 the phase shift between two successive a scans is actually measured within the corresponding analytical signals by a hilbert transform in time domain oct. The first clinical studies using this innovative technology were published in 2014 1.

è un sistema d acquisizione basato sul principio dell. Spectral domain oct sd oct sd oct systems are 50 100x faster than td oct systems and therefore can cover the required tissue volume for oct biomicroscopy in a single eye in approximately eight minutes assuming an a scan rate of 100 khz. Oct utilizes a concept known as inferometry to create a cross sectional map of the retina that is accurate to within at least 10 15 microns. Optical coherence tomography oct is a non invasive diagnostic technique that renders an in vivo cross sectional view of the retina.

La tomografia ottica a coerenza di fase in inglese optical coherence tomography oct conosciuta in italia come tomografia a coerenza ottica è una metodica diagnostica medica oculistica per immagini tomografica che consente lo studio in vivo degli strati cellulari e delle fibre nervose retiniche spesso colpiti da patologie oculari. Time domain doppler oct uses the spectrogram method to create the image. Oct was first introduced in 1991 1 and has found many uses outside of ophthalmology where it has been used to image. Spectroscopic optical coherence tomography soct is an optical imaging and sensing technique which provides localized spectroscopic information of a sample based on the principles of optical coherence tomography oct and low coherence interferometry the general principles behind soct arise from the large optical bandwidths involved in oct where information on the spectral content of.

Optical coherence tomography angiography oct a has emerged as a non invasive technique for imaging the microvasculature of the retina and the choroid. Curr opin ophthalmol 2013 24 150 161. When the spectrum changes with time it is defined as spectrogram. Ophthalmic surg lasers imaging 2010 41 s15 27 grewal ds tanna ap.

The power spectrum represents the power of signal at certain frequencies which can be used to calculate the spectrogram.