View Settings - Zeiss CIRRUS HD-OCT 500 User Manual

CIRRUS HD-OCT User Manual
Specialized and Integrative Visualization Tools
cube. The red, green, and blue spheres can be dragged along the matching colored lines to
define slice planes.
The default setting for the mouse is to rotate the image. You can zoom in or out using the
mouse scroll button.
The 3D Menu appears on the left side of the screen. An enlarged image of the menu is
shown at left. The following functions are available in the menu.

View Settings

Clicking the View Settings button displays the dialog shown at left.
The View Settings dialog allows you to make the following adjustments and options:
• Sliders for Brightness, Contrast, Threshold, and Transparency (%) to adjust the tissue
image appearance. The settings you apply are a matter of preference, though the
default settings may serve as a useful starting point for both color and black and white
images. Click Apply Defaults to return all display parameters to default settings.
The Threshold slider allows the user to remove darker tissue in the image. For exam-
ple, setting the threshold to 50 displays only the tissue that has an intensity value of
more than 50. This enables the user to filter out parts of the image that are not of
interest.
• Use Same Transparency for all Pixels: The default setting is unchecked. This setting
uses high transparency for darker pixels and low transparency for brighter pixels.
These settings enables the user to see through darker tissue. The slider reduces or
increases the transparency for all pixels by the same percentage. For example: setting
the slider at 50% sets all pixels to 50% of their original value.
When Use Same Transparency for all Pixels is checked, all pixels will share the same
transparency value regardless of grayscale value. At slider position 0%, all pixels are
completely opaque. At slider position 100%, all pixels are completely transparent.
• Apply Intensity Filter: Check this checkbox to view a specific tissue intensity and range.
When this checkbox is checked and Greyscale Intensity Range is set to 20, only tissues
with intensity values from 80 to 120 are displayed.
• Lighting: Check this checkbox to change the lighting of the image. By default, the
light source for the volume data is internal. Each pixel emits its own light like a light
bulb. When the Lighting checkbox is checked, the external light source can be
changed so each pixel emits less light and more light comes from an outside light
source. This action yields a more solid appearance. The External Light slider increased
the external light source and decreases the internal light of the volume.
At any time you can select one of the buttons at the bottom of the dialog:
• Save As Global: Saves your changes and remembers them for all subsequent exams. It
does not save the exam, just the settings.
• Recall Global: Restores previously saved Global settings.
• Apply Defaults: Restores the Default settings.
2660021169012 Rev. A 2017-12
8-61