Users Manual Part 6

IBA | 47-8 |
Clinical User’s Guide
Volume 1 - Treatment Session
|Part XI
- Patient Positioning and Alignment Calculating Corrections Using adaPT
insight
|
3D Acquisition: kV CBCT
Note: For more detailed information on how to perform X-ray Image Acquisition,
refer to the adaPTinsight documentation listed in chapter “About this Manual.
In the kV CBCT mode, the acquisition of projection radiographs requires the following
sequence of operations:
1. Select the tube settings (kVp, mA, ms) by using one of the Presets.
2. Press the Load button to send the settings to the generator.
3. In the drop down list under the gantry view, select the type of acquisition: full
scan, half scan, etc. The PRE-START and DRY RUN positions are automatically
synchronized on the hand pendant.
4. On the hardware console, press Green button (see Figure 47-4).
5. On the adaPTinsight screen, press Start. The gantry starts rotating to its initial
position. The status button in the adaPTinsight screen turns green, indicating
that the generator is in the PREPARE state.
6. When the gantry has reached its initial position, press the Yellow button (see
Figure 47-4) on the hardware console.
7. The gantry starts rotating. The status button on the adaPTinsight screen turns
yellow, indicating that the generator is exposing X-ray. During the full duration of
the X-ray exposure, there is a beeping signal. The radiograph projections are
displayed in the image area of the screen The images are refreshed at a
frequency of 1Hz, which is slower than the actual acquisition rate from the
detector.
8. The volume reconstruction takes place simultaneously with the radiographs
acquisition (inline reconstruction). A progress bar is displayed in the left column
to show the progress of the reconstruction
9. When the acquisition is complete, a message appears on the adaPTinsight
screen prompting to press the Red button. On the hardware console, press the
Red button (see Figure 47-4).
10. The reconstructed volume is automatically displayed in the 3D registration
software (see section “3D-3D Image Registration” on page 47-10). If the
reconstructed volume is not satisfactory, it is possible to restart a new
reconstruction with already acquired data (offline reconstruction).
WARNING As a Radiation Therapy Technologist (RTT), it is your responsibility to
verify the absence of collision with the patient or any equipment before
initiating a CBCT image acquisition by performing a dry-run. If the
patient position or the position of immobilization devices changes
between two different fractions, a new verification shall be performed.