myQA iON - Irradiation Log Analysis

• On the Patient Plan Analysis page, a dry-run session or treatment log can be requested by clicking the
  Request Logs button (1). 

• A task is then created on the task screen.

  Please note, the Irradiation Logs tab (2) is always enabled.

  • For PT, logs can be imported and / or pushed via the log forwarder and will be available in the PDF
    Report (see Section 5.2.2.2).
  • For RT, when the Log acquisition slider is turned on, the logs will come into the application and will
    be available in the PDF Report (see Section 5.2.2.1).

  

  Note: It is assumed that the same ROI overrides are used for irradiation logs in clinical practice, therefore the ROI override information will appear under the independent dose section of the PDF report only (see Exporting a Patient QA Report). 

  Dry-run sessions are used to identify logs either without patients lying on the couch or test logs. These
  sessions are useful for testing purposes. It is the responsibility of the user to identify dry-run sessions.
  

• Label a dry-run session by clicking the test tube icon on the irradiation log. It will turn green and the Dry-Run label will appear.
• Click the trash icon to delete the log. 

For RT only 

After the logs have been requested, they will be automatically downloaded to myQA iON. These logs contain
the full irradiation plan and includes all beams for that plan.

• Access the logs via the Select logs tab (1). Each log is displayed (2) with the following information:
  • Date and time processed
  • Log-file name (i.e., Plan label)
  • Status (Finished, Finished With Error, In Progress)
  • Log reconstruction type
• To reduce the number of fractions acquired, the log request can be paused using the Log acquisition
  button (3).
• Click on a log to display the results of the analysis
  • The overall status of the selected logs is shown to the left (4).
  • The summary of results for all available logs is shown to the left (5).

For PT only

• For IBA sites, the user can manually upload the *.zip file containing the irradiation logs by clicking on the Import Logs button (1):
  • One *.zip file per treatment beam is expected.
  • The format of the file must be identical to the format generated by the Proton Therapy System (PTS).
  • Irradiation logs can be imported through the patients list Import DICOM button if the logs are NOT in DICOM RTRecord format.
  • Logs in *.zip format are only allowed for IBA systems while non-IBA logs must be in DICOM RT Record format.
  • Only irradiation log-files acquired for the patient plan in the treatment room defined in the plan are accepted by the SW.
• Once imported, the user can access the logs via the Select logs tab (2). Each log (3) is displayed with the following information:
  • Date and time processed
  • Log file name
  • Status: Finished, Finished With Error, Missing Data, or In Progress
• Each beam is analyzed independently. Click on the log to see the different beams and their status (4). 
• Select a beam to display analysis results.
  • The overall status of the selected logs is shown to the left (5)
  • The summary of results for all available logs is shown to the left (6)

Display of analysis results

The SW then computes the analysis and displays it on the screen. The following graphs are presented:

• Original dose map
• Monte Carlo dose map
• Difference dose map
• 3D Gamma comparison

Optional and for PT only, if defined in the settings:

• Spot map comparison
• Error on total position for all layers
• Error on MU for all layers
• Error on position in X and in Y directions for all layers

The SW raises an error if the computation of the results was unsuccessful. Otherwise, the status of the
report is OK.

Spot Map Comparison and MU / Position Errors 

Spot Map Comparison allows users to check the irradiation logs by clicking through layer by layer. The MU and Position Error (X, Y, and XY) graphs show the probability distribution of MU and position errors.

• Check the Display settings (Section 3.2.1.1) to ensure that the options are turned on.
• Click on each map to adjust the filters and better identify the errors. 

Gamma History

The Gamma History shows the full history of the patient's dose evaluations. Hover the cursor over a specific evaluation to see the passing rate.

Note: The images below are examples. The lines and dots on the graph have been emboldened for better visualization.

Gamma Comparisons 

• Toggle ON / OFF the 3D Gamma and Dose difference maps.
• Click the START ANALYSIS button to update the map view.