Is Cirrus OCT spectral domain?
Cirrus HD-OCT (Carl Zeiss Meditec) is a spectral-domain OCT with a speed of 27,000 A-scans/second and a resolution of 5 µm. It utilizes a SLD light source at 840 nm.
What is Cirrus HD OCT?
The Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA) device is a spectral-domain optical coherence tomography system that allows faster data acquisition than the previous generation StratusOCT (Carl Zeiss Meditec, Dublin, CA), which is a time-domain device.
What is spectral domain OCT?
Optical coherence tomography (OCT) is a technique used to image intraocular tissue structures unreachable by other optical techniques or surgery. An ir laser beam is directed at the patient’s eye, with a reference beam aimed at a mirror.
What type of imaging does a Zeiss Cirrus OCT use?
Cirrus is an HD OCT system with an axial resolution of 6 μm and a scanning speed of up to 25,000 A-scans/s. The scanning area covers 6 × 6 mm, and the scanning depth is 2 mm. Because of spectral-domain technology, Cirrus OCT provides a twofold higher resolution than Stratus OCT generates during the same time frame.
What is the difference between time domain and spectral domain OCT?
In time domain OCT, the depth information of the retina is collected as a function of time by moving the reference mirror. The reference mirror in spectral domain OCT, in contrast, is stationary. The light spectrum from the interferometer is detected by a spectrometer.
What is a 5 line raster?
The Anterior Segment 5 Line Raster is used for the assessment and documentation of the cornea and irido-corneal angle.
What is optic disc cube?
provides a unique view of the optic nerve head (ONH) for analysis. It captures a 6mm x 6mm data cube and automatically identifies the optic disc and cup boundaries. This data cube is comprised of 200 B-scans with 200 A-scans per B-scan, generating more than 40 million data points and is a key to the ONH analysis.
What is a spectral domain?
The new spectral-domain (SD) OCT devices include a spectrometer in the receiver that analyzes the spectrum of reflected light on the retina and transforms it into information about the depth of the structures according to the Fourier principle.
What is a OTC scan?
Optical coherence tomography (OCT) is a non-invasive imaging test. OCT uses light waves to take cross-section pictures of your retina. With OCT, your ophthalmologist can see each of the retina’s distinctive layers. This allows your ophthalmologist to map and measure their thickness.
What is the advantage of spectral domain OCT over time-domain OCT?
Although both time domain and spectral domain OCTs are reliable for macular thickness measurements, spectral domain OCT has better measurement repeatability compared with time domain OCT. Macular measurements obtained from the two OCT systems may not be used interchangeably.
What is the resolution of a spectral domain OCT?
Visante OCT is a separate time-domain system that provides high-resolution (18-μm axial resolution and scans at 2048 A-scans per second) anterior segment and corneal imaging and pachymetry mapping without the need for ocular anesthesia or fluid immersion.
Which is the best spectral domain for Oct?
From the industry leader in OCT, Cirrus is the best-selling spectral domain OCT in the world. Expand your diagnostic insight Cirrus offers anterior segment imaging of the angle and cornea and the ability to measure central cornea thickness.
Who is the world leader in cirrus HD-Oct?
We know you’ll love a Cirrus. Keeping both your patients and your practice in mind, Carl Zeiss Meditec, the global leader in OCT, developed Cirrus™HD-OCT. Not only does it supply you with bar-setting imagery, it delivers detailed diagnostic and change analyses you can rely on time and again.
Which is the next generation spectral domain technology?
Only four years later, several companies started to release the next generation technology, spectral-domain OCT (SD-OCT), AKA fourier-domain OCT, which improved upon TD-OCT by capturing more data in less time at a higher axial image resolution, around 5 µm.
How does Cirrus HD-Oct-Zeiss data cubes work?
Cirrus data cubes are automatically registered with data from prior visits after the scan is acquired. This enables side-by-side visualization of the same location on the retina for each visit. Cirrus compares measurements from the current and prior visits to provide a thickness change map and helps you determine next steps for your patient.