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Maria edited this page Apr 28, 2022 · 10 revisions

Introduction to the 4D evaluation script

The script can be used to:

  • Automatical recalculation of a proton, IMRT or VMAT plan on all phases of a 4D
  • Perform a simple evaluation on plans calculated on all phases of a 4D
  • Export of DVHs from the main plan and phase plans.
  • '''The script is still under development. Each clinic must perform their own quality assurance of script. We do not take responsibility for any bugs or errors that may occur.'''

Technical requirements

  • Binary Varian ESAPI script developed at the Danish centre for particle therapy under the MIT license.
  • Varian Eclipse version 16.1
  • Proton or photon calculation license

Workflow

  • Open a treatment plan and place it in a new course. It is a good idea to have unique names for each phase image, however not nessesary.
  • Run the script '''...\Evaluering4D_v3.esapi.dll'''.
  • Choose the treatment plan in the dropdown-menu and press '''Select plan'''.
  • Define '''CTV1''', '''CTV2''' and '''Spinal cord''' and define the prescribed dose to the CTVs and the evaluation dose to the OAR. This part can also be completely skipped.
  • Chose which 3D images that is to be used for each phase in the dropdown-menus under '''4D image'''.
  • Press '''Evaluate: Select images''' if there already exists plans on the phases and you only wish to evaluate. ** Select the plans for each phase and press '''Evaluate: Evaluate plans'''.
  • Press '''Create and evaluate: Select images''' if the plan has to be copied to each phase and calculated. ** Use '''Create and evaluate: Prepare images''' to select the same calibration curve and structure overwrites as the main CT. The couch structures must be copied to every phase beforehand, the script will only perform the overwrite if the structures exist. This step can be skipped. ** Press '''Create and evaluate: Create plans'''. All plans are now calculated. This can take a while, and the interface will freeze. Have patience. It seems VMAT plans are extremely slow. Go get some coffee.
  • Use '''Export DVHs''' to export DVHs. They will be exported for all structures and for the robust scenarios of the main plan.
  • The section'''Errors and messages''' will write out messages and/or errors.
  • Close the window manually. If there are new plans calculated they have to be saved by the user in the main Eclipse window.

Evaluering4D

Tips, tricks and known issues

  • VMAT plans are very slow.
  • Only the two buttons '''Create and evaluate: Prepare images''' and '''Create and evaluate: Create plans''' will write to the database.
  • If AcurosPT is used, the plans will only be copied and not calculated if there is no materials table selected.
  • When 4D phases are automatically found the DCPT specific strings are used. These are defined in the method: "SelectPlan_Click"

Incomming update spring 2022

  • GPU calculation for VMAT
  • An extra OAR for evaluation
  • Automatic copy of structures from main plan to 4D phases
  • A progress bar while calculating
  • Add course name to plan name in the selection box
  • Move "edit patient" to the button functions.
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