Troubleshooting Detection Of Infrared Body Markers; Overview - Brainlab EXACTRAC INFRARED MONITORING Clinical User Manual

9.2

Troubleshooting Detection of Infrared Body Markers

9.2.1

Overview

General Ambiguities can occur with Brainlab's ExacTrac Patient Positioning System due to inaccurate
Information marker placement. This section explains the basis of the algorithm used by ExacTrac Infrared Mon-
itoring for detecting the marker positions and the cause of ambiguities. Furthermore, tips are pro-
vided to avoid ambiguities in daily use.
NOTE: ExacTrac Infrared Monitoring is able to resolve ambiguities in infrared marker detection by
comparing the visible markers with the CT set reference (if markers are available in the CT set). This
method only works as long as ExacTrac Infrared Monitoring can recognize the patient. If ExacTrac
Infrared Monitoring can no longer recognize the patient because the marker pattern is very different
from the CT reference, ambiguities can no longer be resolved.
96 Clinical User Guide Rev. 1.1, ExacTrac Infrared Monitoring Ver. 1.0