Zeiss CIRRUS HD-OCT 500, Руководство пользователя

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Overview
2660021169012 Rev. A 2017-12 CIRRUS HD-OCT User Manual
9-6
• Sub-RPE: The OCT Analysis uses a predefined Sub-RPE slab. The Sub-RPE slab uses a
Pixel option that can calculate the pixel values or maximum pixel values. The Sub-RPE
preset default Project type MAX project method is defined as follows:
Top: RPE + 29
μ m
Bottom: RPE + 49 μ m
NOTE: This preset is not available for ONH Angiography.
• RPE RPE-Fit: The RPE to RPE-Fit preset uses the summation of pixel values as the
default. The RPE RPE-Fit preset covers the region between the RPE to RPE-Fit layers.
NOTE: This preset is not available for ONH Angiography.
• Whole Eye: This preset is intended to illustrate vasculature of the whole posterior
segment that was scanned. There are no top or bottom reference layers.
• RPC: The Radial Peripapillary Capillary (RPC) preset performs a vessel perfusion
measurement analysis for the RPC layer. The RPE preset is defined as follows:
Top: ILM
Bottom: RNFL
NOTE: This preset is only available for ONH Angiography.
These slab / en face definitions should be considered reasonable starting points, especially
for normal eyes, but the inner and outer boundaries can be offset by grabbing magenta
lines and shifting them in the B-scans. Furthermore, the slabs will not appropriately
illustrate the vasculature of interest if the segmentation has failed. In this case, a layer
segmentation editor is available as a licensed feature for the user to edit the ILM and
RPE boundaries.
As with the En Face analysis, you may create your own custom presets as follows:
• Create Global Custom: Specify a region of interest that, once created, is available for
analysis for all scans.
• Create Scan Custom: Specify a region of interest that, once created, is available for
analysis for a specific scan.
The custom slabs uses a Pixel option that can calculate the pixel values or maximum
pixel values. These two custom options are described further in "
Create Global
Custom" on page 8-4 and " Create Scan Custom" on page 8-4 respectively.