Users Manual Part 6

IBA | 48-6 | Clinical User’s Guide
Volume 1 - Treatment Session
|Part XI - Patient Positioning and Alignment Using the Universal Beam Triggering Interface |
Operating the UTEU
Two Modes of Operation: Manual or Automatic
Note: Whether you are using the Universal Triggering Electronic Unit (UTEU) in
manual mode or in automatic mode, you are always capable of pausing the irradiation
following the procedure described in Chapter “Pausing, Resuming and Stopping an
Irradiation”.
Automatic Triggering
When operating in automatic triggering mode, the selected gating system dictates
when beam is authorized.
The gating system generates a beam triggering signal as long as the gating signal is
within boundaries, predefined to be acceptable for taking X-ray images or treatment
with beam.
During irradiation, the beam is interrupted and restarted upon instruction by the
beam triggering signal.
Manual Triggering
In manual triggering mode, you have to press the Internal triggering button and
keep it pressed for as long as you want beam to be authorized. When doing so, you
have to carefully monitor the gating system in use and press the Internal triggering
button whenever beam is authorized.
Operating in manual mode means that you opt not to use the beam triggering signal
issued by the gating system but to supply the signal yourself by the push of a button.
CAUTION As a Radiation Therapy Technologist, when planning a treatment with
automatic beam gating, choose the treatment delivery settings (such as
beam delivery technique, dose rate, number of repaintings) and patient
monitoring settings (such as duty cycle, acquisition frequency) in
function of the clinical goals to be achieved and safety criteria to be
met, taking into account the global latency of the system (latency of the
patient monitoring system combined with the latency of the treatment
machine and the latency to detect and process a system failure).