9 Analyzing Exam Data and Creating Reports
Instructions for Use
2660021169042 Rev. A 2018-03
9.4 Working with Viewport Images
122 / 246
2660021169042 Rev. A 2018-03
for which there may appear to be bright patches or areas in
this image that are not necessarily due to pathology. These
are listed below.
Examine the segmentation, flow, and intensity of B-scans carefully
for abnormal-appearing vasculature in the Avascular slab.
• Errors in segmentation may cause there to be apparent vascu-
lature. This is particularly common in the presence of
geographic atrophy. Bright areas below the Bruch’s Membrane
are common in the presence of geographic atrophy due to the
fact that the highly scattering RPE is missing. When this
happens, the RPE segmentation can frequently fall into the
choroidal areas and be irregular.
• Because the boundaries of the inner layers of the retina are
estimated rather than segmented, they may incorrectly include
bright areas that could contain decorrelation tails or even actual
vasculature.
• The brightness and contrast of the avascular layer is enhanced
in order to assist in visualizing any potential abnormal vascu-
lature, but this can also tend to emphasize both noise and weak
decorrelation tail signals.
• Exudates or migrated RPE may cause there to be artifacts in
different layers. This should be uncommon in the outer retina,
but it can occur.
• The segmentation, flow, and intensity of B-scans should be
examined carefully if there is abnormal-appearing vasculature in
the Avascular slab.
9.4.3 Hide or Show a Fundus Overlay
You can overlay the fundus image onto the OCT image to view
structural and functional information together. Viewing the
combined information provides greater insight into retinal
pathologies and increases diagnostic accuracy.
You can change edit the fundus overlay to optimize the visibility of
the images. for more information, see: Editing the Fundus Overay
[
}
123]
.
To hide or show the fundus overlay:
Prerequisite
þ
Logged in to review station (or instrument): Logging In as
Operator or Data Analyst [
}
73]
Содержание PLEX Elite 9000
Страница 1: ...PLEX Elite 9000 Version 1 7 Instructions for Use...
Страница 54: ...Empty page for your notes...
Страница 106: ...Empty page for your notes...
Страница 174: ...Empty page for your notes...
Страница 182: ...Empty page for your notes...
Страница 210: ...Empty page for your notes...
Страница 218: ...Empty page for your notes...
Страница 224: ...Empty page for your notes...
Страница 226: ...Empty page for your notes...
Страница 228: ...Empty page for your notes...
Страница 230: ...Empty page for your notes...
Страница 233: ...Instructions for Use Index 2660021169042 Rev A 2018 03 2660021169042 Rev A 2018 03 233 246 Index...
Страница 245: ...Empty page for your notes...