11
Control the operability of the fusionTrack sys-
tem and instruments
In this chapter is explained how to guaranty the operability of the fusionTrack. Outputs and alert mes-
sages are generated to help protect against hazardous behaviours. They can also be used to validate the
fusionTrack operability.
It is assumed that the fusionTrack is correctly setup as described in Chapter 5 and the software on the
host PC is correctly installed as indicated in Chapter 6.
The various checks, presented in the following sections, allow to ensure that the computed
marker
position is valid. Different outputs and messages could be used to indicate the status of those tests.
11.1
Control fusionTrack operability
There are three ways to check the fusionTrack system is correctly working:
1. the monitoring of the registration error, see Section 11.2;
2. the ‘zeroing method’, described in Chapter 12;
3. the ‘accuracy assessment method’, described in Chapter 13.
The two last methods guarantee the fusionTrack is operational in the configured environment, by checking
the calibration, integrator settings and environment configuration. The zeroing method must be performed
before the navigation procedure is started, or during use, as soon as a
marker
is changed, cleaned, or if the
fusionTrack device must be cleaned, whilst the accuracy assessment method is performed with a frequency
determined by the integrator. The two methods allow to avoid (non-exhaustive list):
- using a decalibrated fusionTrack device, which can be due to shock during transport, storing or
handling;
- using the fusionTrack device in noisy environment, such as an air perturbation between fusionTrack
device and
marker
;
- any electromagnetic interference with internal electronics;
all of those might lead to wrong measurements.
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