This study aimed
to collect and analyze the recorded daily setup parameters of the bed as
incidentally captured on an integrated record and verify system.
This was done on
some radical head and neck patients treated from 2008 to 2010 at Charlotte
Maxeke Johannesburg Academic Hospital (CMJAH) in South Africa. Most of these
patients had anterior neck fields that were set-up using fixed couch
longitudinal movements (meaning more than one treatment isocentre).
It was hoped that
the ideal absolute position of the patient on the bed relative to the isocentre
of the treatment machine, for a course of head and neck radiotherapy at CMJAH,
could be established. Knowledge of the set-up margin achievable could also
assist in defining the tolerance assigned to couch parameters on the electronic
record and verify system, such that setup is restricted accordingly.
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