How do I run scans in the myQA Accept SMARTSCAN mode?
To start scanning with SMARTSCAN, you will need a queue with at least one of the following queue items (2109-001 Accept):
■ Depth dose
Electron scans will be available in a future SW update.
You will also need to have the following conditions met:
■ Controller turned on with ethernet cable connecting the CCU to PC or CCU to network jack
■ Check that the CCU is communicating with the PC by going to Queue Setup and verifying if the “Connect” button in the controller panel is available to be clicked.
If it is greyed out, there is either a public firewall issue or IP setting issue.
■ Isocenter and Water surface set on the hand pendant. The Isocenter and Water surface buttons are marked with arrows here:
The Zero Position menu is here:
Please do not set Isocenter or Water surface using the Zero Positions button. The Zero Positions button is used to set the center of travel for the mechanics of the tank. This position can be checked by referencing the coordinates on the hand pendant and the rulers on each axis of the tank. Drive each axis, x, y, and z to the 0 indicated on the ruler on the tank. If the hand pendant coordinates are off by more than 0.5 cm, please reset the 0 for that axis.
If you will be using a diode and chamber during scanning, set Isocenter and Water surface with the chamber. Later, you will select the detectors to be used based on field size. The baseline scans of SMARTSCAN will request the chamber to be connected, so it is best to set isocenter and water surface with the chamber. Also note that if you will be using the Stealth for scans <15cm, it is recommended to set the stealth up now as that is what is used for baseline scans.
■ The Radiation device, Measurement device, Device turn angle, Controller, and Medium need to be set correctly in the Queue settings panel. The field and reference detector will be set later in the SMARTSCAN wizard.
With the CCU connected in the SW, the isocenter and water surface set, and at least one of the compatible queue item scans in the queue, you can press the green GO SMARTSCAN button to start the SMARTSCAN wizard.
The SMARTSCAN Confirmation box opens. Verify that the correct tank and turn angle is displayed.
You will now set which detectors will be used based on field size. Here is a table showing the recommended field size for IBA Detectors.
The detectors not recommended for the small field sizes are greyed out when attempting to select them, but they can still be used. The warning exclamation point is noting that the selected detector is not recommended for that field size. For the reference detector, it is recommended to use the Stealth for field sizes 15 cm and smaller. A chamber or diode is recommended as a reference detector for field sizes greater than 15 cm.
Set the Analysis protocols to the template with the defined tolerance protocols. Please see the guide to creating protocol templates if none have been created.
The user has the option to save to a file or save to a database if a database is connected. If you are unsure of which option, it is recommended to check the “File based” box, select the location the file will be saved, and name the file. The Queue section will list any scans that cannot be performed with the SMARTSCAN wizard. The scans compatible were listed at the start. With everything set, click “Continue”.
The queue items will be in the left-hand column. Click the (>>) arrows to the right. The wizard will group the queue items into groups. These groups are optimized to create the fewest changes to the setup possible.
The user can drag queue item into different groups. It is recommended to leave the optimization as it is.
With the groups created, click on Baseline Measurements at the top.
Click “Start baseline measurements”, then follow the prompts.
The Dose rate prep step will ask for a certain amount of MU to be delivered. Set the linac to deliver the specified amount. Please wait for the expected MU to be delivered.
Later, during scanning, there will also be an “Awaiting beam off” prompt. While you are scanning, the user can set the MU delivered to be a large number. Then when the “Awaiting beam off” appears, the user can stop the beam manually. Please do not do this during the dose rate prep step. During the Dose rate prep part of the background measurements, deliver the full amount of MU specified.
If the inline/crossline shift and angle deviation are greater than the error tolerances, there will not be an option to correct for the CAX. Please readjust setup and ensure that the angle deviation is within the error tolerances.
If the dose rate will be changed during scanning (I.e. FFF beams at a higher dose rate than FF beams) the dose rate prep step will need to be redone. When switching to a higher dose rate, please go back to the baseline measurements and redo the dose rate prep when the higher dose rate scans start.
If the field detector is changed during scanning, it is recommended to redo the CAX check
The preliminary scans are optional. The idea is to do a few scans, verify that the setup is good, and the rest of the scans will proceed without issue. Alternatively, the user can skip the preliminary scans and determine if the setup is good by the first few scans.
Once the background, dose rate, and CAX are completed, click on the Measurement button in the top ribbon.
During measurements, prompts will appear asking for a specific setup. Follow the prompts.
The prompts will inform you when a detector change or linac change is necessary.
The Summary tab of the wizard shows an overview of the scans.
Queue items run in SMARTSCAN will be locked in the queue and the user will be unable to edit the queue items. The “L” column is for locked.
To edit the locked queue items, copy and paste them either in the same queue or in a new project. The copied queue items will not be locked.
Detailed information regarding SMATSCAN can also be found in the myQA Accept User Manual, which is included in this article.