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Software for automated quality assurance for radiotherapy patient treatment plans
A.Xing1, S. Arumugam1, L.Holloway1-4, P. Vial1, 2 ,, G.Goozee1,4
1Liverpool and Macarthur cancer therapy centres and Ingham Institute, Liverpool Hospital, NSW, Sydney, Australia.2Institute of Medical Physics, School of Physics, University of Sydney, Sydney, NSW, Australia. 3Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW, Australia. 4South Western Sydney Clinical School, University of New South Wales, Sydney, NSW, Australia
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• Modern radiation treatment techniques are complex
• Comprehensive plan checking is required
• Manual checking of individual plan parameters is time consuming and potentially error prone
Background
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PlanChecking in our existing workflow
Physicist planning Consult
(RT & Physicists before approval)
RT print plan chart
(RT after RO approve plan)
Physics & RT plan checking
(after transfer to R&V system)
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• Local and international incidence databases indicate a relatively high number of incidences are seen during planning and data transfer
Background
RADIOTHERAPY RISK PROFILE Technical Manual published by WHO
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Aim of the project
To develop a software tool, PlanChecker, for more efficient and more comprehensive checking of:
• 3DCRT
• IMRT
• VMAT
Radiotherapy plans
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Functionality goals for PlanChecker
• Easily fits into the current workflow.• Checks the integrity and consistency of transferring plan data
from TPS to R&V system• Checks the contours e.g.: Name convention, consistency etc• Checks the plan quality e.g.: plan objectives and quality
metrics.• Full automation • Running either as server and or as a standalone program on
any PCs or centralized computers.• General enough to run the system at different centres with
different platforms, TPS and delivery systems.
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PlanChecker in existing workflow
RT export RTP file
TPS(XiO, Pinnacle, Tomo)
MOSAIQ
Network Directory
RT import RTP file
RT export:RTP fileDICOM dose file DICOM plan fileDICOM structure file
PlanChecker
Generate a pdf Report
Physics/RT run PlanChecker.
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PlanChecker use-GUI interface
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PlanChecker functionality -
patient identityComprehensive checking by PlanChecker:-Patient Identity
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Comprehensive checking by PlanChecker:-Treatment Prescription
PlanChecker functionality-
Treatment prescription
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Comprehensive checking by PlanChecker:-Patient setup
PlanChecker functionality-
Patient Set-up
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Comprehensive checking by PlanChecker:-complete beam parameters for each beam
PlanChecker functionality-
Beam parameters
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Comprehensive checking by PlanChecker:-All control point parameters for each beam
PlanChecker functionality-
beam control points
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PlanChecker output -Summarized results
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Validation of PlanChecker-error simulation testing
PlanChecker
Errors introduced in MOSAIQ
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Validation of PlanChecker-error simulation results
• 126 plans with simulated errors demonstrated accurate error detection.
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• Use of Planchecker and manual process completed side by side with over 50 clinical plans
• All plans successfully checked
Validation of PlanChecker-within a clinical setting
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Future Work-Functionality goals for PlanChecker
• Easily fits into the current workflow.• Checks the integrity and consistency of transferring plan data
from TPS to R&V system• Checks the contours e.g.: Name convention, consistency etc• Checks the plan quality e.g.: plan objectives and quality
metrics.• Full automation • Running either as server and or as a standalone program on
any PCs or centralized computers.• General enough to run the system at different centres with
different platforms, TPS and delivery systems.
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Conclusions
• A software system, PlanChecker was developed and prototyped for comprehensive checking of simple and complicated radiotherapy plans.
• Error simulation testing validated use of PlanChecker• The system is still being actively developed to include
more modules for comprehensive plan checking.