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Author Spotlight: Improving Radiation Therapy Access with Radiation Planning Assistant
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Unified risk analysis in radiation therapy.

Daniel Lohmann1, Maya Shariff1, Philipp Schubert1

  • 1Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstraße 27, 91054 Erlangen, Germany; Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), Erlangen, Germany.

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|October 9, 2022
PubMed
Summary

This study introduces a method to model radiotherapy workflows using Unified Modeling Language (UML) activity diagrams. This enables detailed, workflow-specific risk analysis, including Information Technology (IT) risks, for improved patient safety.

Keywords:
Activity diagramIEC 80001-1Risk analysisUML

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Area of Science:

  • Medical Physics
  • Radiotherapy
  • Health Informatics

Background:

  • Radiotherapy treatment complexity and IT infrastructure demand advanced risk analysis methods.
  • Existing risk assessment approaches may not adequately address the intricacies of modern radiotherapy workflows.

Purpose of the Study:

  • To present a methodology for modeling radiotherapy treatment processes at multiple levels.
  • To enable workflow-specific risk analysis and assess the impact of IT risks on the overall treatment.

Main Methods:

  • Utilized Unified Modeling Language (UML) activity diagrams to model radiotherapy workflows.
  • Employed swim lanes for workflow subdivision into distinct levels.
  • Exported models in an XML-compatible format and stored them in a database using a Python program.

Main Results:

  • Modeled specific workflows (CT Appointment, Glioblastoma Multiforme, Deep Inspiration Breath Hold) in detail.
  • Generated automated, workflow-specific risk matrices, incorporating medical device risks.
  • Enabled rapid retrieval of medical device network details via SQL queries.

Conclusions:

  • UML activity diagrams are effective for modeling radiotherapy workflows.
  • Facilitated establishing connections between different workflow levels.
  • Enabled comprehensive, workflow-specific risk analysis for enhanced safety.