Troubleshooting Fasttrac - Zeiss CIRRUS HD-OCT 500 User Manual

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2660021169012 Rev. A 2017-12
Tracking and Repeat Scans
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Troubleshooting FastTrac

Indicator Potential Problem
OCT image The OCT image is not centered
centered properly and the scan is too high or
too low in the window.
For patients with certain pathologies
or anatomical features, it may be
difficult to ensure centering across all
B-scans in a cube.
Other factors Iris image – scan may not be aimed
for tracking through the pupil.
Fundus image – focus has drifted
away from patient's refraction.
Patient fixation issues.
Excessive blinking or moving.
Figure 6-23 and Figure 6-24
several of the reasons mentioned above.
What you should do
Use the up and down arrows (or
mouse wheel) to center the scan.
Cancel the scan. On the
screen, turn off the monitoring of the
Z position. Then, initiate a new scan
with FastTrac.
Adjust the scan position in the Iris
Viewport.
Manually adjust using the Focus
controls.
Communicate with the patient to
ensure they are fixating in the same
position as at the start of the scan.
Communicate with the patient to
reduce blinking and movement.
illustrate cases where tracking is not progressing due to
CIRRUS HD-OCT User Manual
Acquire Scan