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Technical Note: an algorithm and software for conversion of radiotherapy contour-sequence data to ready-to-print 3D

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Summary

This study introduces an algorithm and open-source software for converting DICOM files into 3D printable STL models for radiotherapy. This tool simplifies the process, making 3D printing more accessible for patient-specific radiotherapy accessories.

Keywords:
3D printingalgorithmsapplicatorsbolusesphantoms

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Area of Science:

  • Medical Physics
  • Radiotherapy Technology
  • 3D Printing Applications

Background:

  • Three-dimensional (3D) printing offers significant potential to enhance radiotherapy (RT) efficiency.
  • Converting DICOM files from RT planning systems to 3D printable formats like STL is crucial but often complex due to data specificity and lack of standardization.
  • Existing literature inadequately addresses the geometry processing steps required for 3D printing in RT.

Purpose of the Study:

  • To present a detailed algorithm and open-source software for converting DICOM contour data into 3D printable STL files.
  • To address the complexities and lack of standardized methods in processing RT planning system data for 3D printing.
  • To facilitate the creation of patient-specific accessories for radiotherapy.

Main Methods:

  • Developed an algorithm to automatically process contour-sequence data within DICOM files.
  • Created open-source software implementing the algorithm, available under GNU GPL license.
  • The algorithm automatically handles data from RT planning systems, correcting for issues like curve orientation and artifacts.

Main Results:

  • Successfully converted numerous structures from DICOM files into ready-to-print 3D STL models.
  • Achieved absolute fidelity in the conversion process, with no reported errors.
  • The implemented software is freely usable, modifiable, and redistributable.

Conclusions:

  • The developed algorithm and software enable research and development of patient-specific accessories for radiotherapy.
  • This tool enhances the accessibility of 3D printing for medical professionals in RT.
  • Contributes to the broader advancement and adoption of 3D printing technologies in radiotherapy.