Technical Report: Efficient constancy evaluation of the Eclipse treatment planning system's photon and electron dose...

Area of Science:

• Medical Physics
• Radiation Oncology

Background:

• Accurate dose calculations are crucial for effective radiation therapy.
• Periodic constancy checks ensure the reliability of treatment planning systems like Varian Eclipse.

Purpose of the Study:

• To describe an institutional workflow for Varian Eclipse dose calculation constancy checks.
• To demonstrate the efficiency gains using Radformation ClearCheck software.

Main Methods:

• Development of photon- and electron-specific synthetic phantoms for comprehensive modality-specific field evaluation.
• Utilization of Radformation ClearCheck's plan comparison templates for rapid analysis of numerous dose calculation metrics.
• Application of the methodology to validate primary and secondary dose calculation algorithms.

Main Results:

• Near-instantaneous evaluation of 116 photon and 165 electron calculation metrics per plan.
• Successful validation of Radformation ClearCalc finite-size pencil beam and electron algorithms.
• Constancy evaluations for 6 primary and 4 secondary algorithms completed in under one hour.

Conclusions:

• The described institutional approach provides a highly efficient method for ensuring dose calculation accuracy in Varian Eclipse.
• Radformation ClearCheck software significantly streamlines the constancy testing process, saving valuable clinical time.