Users Manual Part 1

Clinical User’s Guide
IBA | 6-13|
Volume 1 - Treatment Session
|Part II
- Using Treatment Room Equipment Elementary Notions on Patient Positioning
|
Using Trajectory Motions
Trajectory motions are applicable to the gantry when the full trajectory of its
movement is predefined. This type of motion enables volumetric image acquisition
using adaPTinsight. The parameters of the gantry’s trajectory are set by the user
(e.g., start and stop gantry angles and gantry rotation speed) and a dry-run is
performed before treatment. Motion is initiated by pressing both the software and
the hardware start buttons (respectively on adaPTinsight and on the Cone-Beam
Computed Tomography - CBCT console), and does not require continuous activation
from the user. Motion stops when the trajectory is complete or when the user
presses a motion stop button.
Note: The trajectory motion mode is closely related to CBCT image acquisition. For
further information on CBCT acquisition refer to adaPTinsight user documentation.
Patient Positioning Devices
Proper positioning and alignment of a patient entails the proper positioning of the
patient positioning devices involved: gantry, PBS Dedicated snout, and Patient
Positioning System (PPS). Depending on the case, one or more of these devices
may need to be properly positioned.
Note: For further information on Patient Positioning Devices, refer to Chapter 7.
Different PPDs exist in each type of treatment room, as follows:
Gantry Treatment Room (GTR):
Patient Positioning System (PPS)
Gantry
PBS Dedicated snout and accessory drawer
WARNING As a Radiation Therapy Technologist (RTT), you should visually check
the absence of collision before initiating a Cone-Beam Computed
Tomography (CBCT) acquisition. In case of doubt, you shall perform a
dry-run of the CBCT trajectory to confirm that there is no collision.
As a RTT, you shall be vigilant regarding positioning changes; if the
patient position or the position of immobilization devices changes
during different fractions, this verification shall be re-done.
As a RTT, you shall also be vigilant regarding collision with other
equipment such as anesthesia or respiratory equipment which have a
direct impact on the patient's safety.