In the simultaneous imaging modes , each image line is scanned twice subsequently with
alternating lasers. For example, during simultaneous fluorescein and indocyanine green
angiography, only the 488 nm laser is switched on for the first scan of a line, while during the
second scan only the 790 nm laser is switched on..
In every acquisition mode, individual images, temporal image sequences, or a focal series of
images (layered three-dimensional images) can be acquired.
1.2.2 Optical Coherence Tomography (OCT)
The Spectralis OCT and the Spectralis HRA+
tomography (SD-OCT) technology, also
referred to as Fourier domain OCT (FD-
OCT). The beam of a super luminescence
diode (SLD) scans across the retina to
produce a cross sectional B-scan image. To
create three dimensional images of the
retina, up to 768 equally spaced B-scans can
be sequentially acquired. The infrared beam
of the SLD has an average wavelength of
870nm
OCT use spectral domain optical coherence
evices.
ral computers within a network, additional
in
the complete operating software (image acquisition and viewing) provided with
ftware enables the import of digital
EX
1.2.3 Use of Several Devices, Registration Link
All Heidelberg Engineering imaging products use the Heidelberg Eye Explorer (HEYEX)
software platform and database to store patient information and images. Image acquisition and
analysis is controlled by HEYEX plug-in software modules that are specific to each device.
Network connections between devices
of the Spectralis family allow access to
the common HEYEX database, as well
as registration of OCT images to
angiography images taken with
simultaneous IR images on a separate
HRA2, Spectralis HRA or Spectralis
HRA+OCT system. The
simultaneously acquired IR image
serves as the registration link between
the images obtained at separate d
For simultaneous use of the software on seve
networking licenses can be obtained. One network license can cover all modules installed
the network.
In addition to
each device, optional HEYEX viewing software is available for each module. This viewing
software enables users to open E2E files and to review images and patient data on PCs which
are not connected to the Spectralis or HRA device.
Furthermore, the optional Image Capture Module so
images or documents from other devices (fundus cameras, perimeters etc.) into the HEY
patient file.
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