Slice And Slab Options - Zeiss CIRRUS HD-OCT 500 User Manual

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Specialized and Integrative Visualization Tools

Slice and Slab Options

The lower right viewport, Figure 8-52, has a drop–down menu to select Slice (default),
Slab, ILM, RPE, or RPEfit.
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When you select Slab, the other two scan viewports show two same–color dashed lines
separated by a small distance. This separation is the slab thickness, which you can adjust
in either of the other viewports by dragging the posterior line by its handle on the edge.
Dragging the anterior line handle moves both lines of the slab together to reposition it in
the scan image. The resulting slab image you see represents an average signal intensity
value for each A-scan location through the selected depth of the slab.
The drop–down options ILM, RPE, and RPEfit are variations of the slab. When you select
any of these, you view the slab (of selected thickness—you can adjust it as above) relative
to the selected layer. For example, if you select ILM (Figure 8-52), a dashed line of the
same color as the ILM appears posterior to it, and the resulting scan image appears in the
lower right viewport (and in the scan cube overlay when Slab is selected there). You cannot
raise the lower dashed line above the upper one, and the minimum separation is
2 μm.
2660021169012 Rev. A 2017-12 CIRRUS HD-OCT User Manual