KEY POINTS
- Dataset article describing MAAS-SFRThelper, a shared-source plugin for Varian Eclipse designed to support spatially fractionated radiation therapy structure generation, optimization, and dose evaluation.
- The plugin was implemented in C# using the Eclipse Scripting Application Programming Interface for Eclipse 15.6 or later and includes task-oriented tabs for SphereLattice, Optimization, Evaluation, stereotactic central ablative radiation therapy, and experimental rod structures.
- SphereLattice supports 5 sphere placement approaches: hexagonal close-packed, simple cubic, alternating cubic, centroidal Voronoi tessellation, and constraint-based Monte Carlo.
- Digital phantom validation showed expected analytic behavior for sphere placement; in one optimization test, the optimized lattice improved peak-valley dose ratio from 2.40 to 2.94, a 22.5% increase.
- Evaluation testing recovered all spheres with maximum center-position error of 0.1 mm and provided deterministic three-dimensional peak-valley classification, but validation was limited to digital phantoms.
CLINICAL TAKEAWAY
This toolkit addresses a real practical bottleneck in spatially fractionated radiation therapy: inconsistent lattice generation, optimization, and peak-valley reporting across institutions. It may help standardize planning workflows for future multi-institutional studies, especially in Eclipse-based departments. But it is not clinically validated yet; digital phantom testing is useful, but patient-data validation, site-specific commissioning, and protocol-level quality assurance remain essential.