Implementation and Validation of Anisotropic Analytical Algorithm in Eclipse Treatment Planning System for Indigenous...

Area of Science:

• Medical Physics
• Radiation Oncology
• Radiotherapy Technology

Background:

• The Eclipse treatment planning system (TPS) now utilizes the anisotropic analytical algorithm (AAA) for telecobalt dose calculations, replacing the outdated pencil beam convolution (PBC) algorithm.
• AAA is a 3D superposition algorithm configured using Monte Carlo-derived parameters and clinical beam data.

Purpose of the Study:

• To assess the clinical feasibility of implementing the AAA dose calculation model within the Eclipse TPS for the Bhabhatron II telecobalt machine.

Main Methods:

• The Bhabhatron II was configured as a generic machine in Eclipse TPS due to the absence of a specific inbuilt model.
• Clinical beam data measurements were performed for algorithm configuration and validation of dosimetric parameters.

Main Results:

• Following configuration, treatment plans were created in TPS, executed on the Bhabhatron II, and subsequently evaluated.
• The study confirmed the successful configuration and validation of the AAA algorithm for the Bhabhatron II.

Conclusions:

• The anisotropic analytical algorithm (AAA) is highly suitable for precise dose calculations for telecobalt therapy using the Bhabhatron II.
• AAA can be confidently implemented for clinical use in radiotherapy planning with this machine.