Chapter 7 - Using the viewing options
7 Using the viewing options
When you review images it can be useful to use some of the viewing tools to look at the images in different
ways. Some viewing tools let you change the color of the image, or help you concentrate on a particular
area and use special tools to quickly change the review options for that area.
Color Channels
Images are captured using laser light. Each laser color penetrates the retinal structures to different depths.
Looking at the individual layers helps identify where pathology is located in the retina, see Image View
Controls on page 83.
Review Tools
Comparison Overlay
The Comparison Overlay lets you compare two images. This feature is particularly useful when comparing
images of the same patient over time. This view overlays the images. You can then adjust the transparency
to blend the information shown in the image. This helps identity features that have moved or changed
shape or size since the last image was taken.
You can alter the size, transparency and view of the Comparison Overlay.
False Color views
The False Color views display the grayscale Green Channel view and Red Channel view using an alternative color
palette. The False Color views can make some subtle features more obvious.
Automated view
The Automated view moves around the image. The tool displays the image in the Green Channel view and Red
Channel view before showing the image in the Composite Color view, see Using the Automated view on page
45.
optomap® fa Slideshow
Displays the selected sequence of fluorescein angiography images in a slideshow see Selecting images
from the Image Series view on page 38. The user can pause, rewind or fast forward the slideshow using
the same controls are the Automatic view.
3D Wrap
The 3D Wrap view is a patient education tool. It runs an animated view of the current image.
Stereo Imaging
Some systems are capable of capturing Stereo Images. These images are displayed side-by-side as two
linked images.
When reviewing Stereo Images you need to select the viewing technique:
l
use a stereo viewer (stereograph)
l
focus in front of the images
l
focus behind the images
The layout is dependant on the viewing technique you have selected in the User Preferences dialog box,
see Setting User Preferences on page 15.
Magnifier
When the image is opened in the Review application the entire image is optimized. The Magnifier lets you
review the locally optimized area being magnified. This local optimization can display subtle pathology
without having to review the entire image using manually altered view controls, see Image View Controls
on page 83.
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