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Introduction
This is probably the module you'll use most often. It's also the first thing you should try
whenever you have any data you'd like to visualise. Simply connect the output of any data-
generating or filtering module to any input of the slice3dVWR and execute the network. The
slice3dVWR picks a suitable default visualisation based on the input data you supply.
Slices
When a volume has been connected to an input of the slice3dVWR, the volume can be
examined by "slicing'' through it. By default, an axial slice is created automatically, but any
number of additional slices can be activated.
Overlay modes
The slice3dVWR has several overlay modes. These modes make it possible to visualise the
correspondence between multiple inputs, for e.g. original CT data and a segmentation. If a
second volume input is connected, the slice3dVWR checks if the dimensions of the already
connected volume. If this is the case, the connection is allowed and the second volume is
overlayed (superimposed) on the first.
There are several ways to perform this overlay. This setting is user-configurable and its user
interface can be found on the "Main'' tab of the slice3dVWR "Controls'' window, in the "Slices''
section. The user interface consists of an Overlay Mode choice box and an Alpha slider. The
alpha slider determines the alpha parameter used for the fusion-based overlay modes.
· Green Fusion: The overlay is composited with the user-defined alpha
parameter. The
value (i.e. brightness) is directly related to the image intensity of the overlay, so we see
shades of green (reflecting the overlay intensity) alpha blended with the primary input.
· Red Fusion: Same as above, except with shades of red.
· Blue Fusion: Same as above, except with shades of blue.
· Hue Fusion: The value is kept constant, but the hue is directly
related to the overlay image
intensity. The overlay is alpha blended with the user-supplied alpha parameter.
· Hue/Value Fusion: Hue and brightness are directly related to the
overlay image intensity.
The overlay is alpha-blended with the user-supplied alpha parameter.
· Green Opacity Range: The opacity of the overlay is directly related
to its image intensity.
The hue is constant green and the brightness is constant unity.
· Blue Opacity Range: The same as above, except the hue is constant
red.
· Blue Opacity Range: The same as above, except the hue is constant
blue.
· Hue Opacity Range: The hue and the opacity of the overlay are directly
related to the
overlay image intensity.
Adjusting the alpha slider whilst one of the "fusion'' overlay modes is active will result in real-
time changes. The idea is to adjust it up and down its complete range in order to get a better
idea of the amount of the image correspondence.