Development of indigenous 2D and 3D gamma evaluation software tool for IMRT patient specific QA

With the wide clinical implementation of intensity- modulated radiation therapy, software tools for quantitative dose (or fluence) distribution comparison are required for patient-specific quality assurance. The technique known as the 'Gamma evaluation method' is the most widely used and incorporates pass-fail criteria for both distance-to-agreement and dose difference analysis of dose distributions and provides a numerical index (Gamma ) as a measure of the agreement between two datasets