Pretreatment Dose Verification for Squamous Cell carcinoma of The Tongue

Abstract

The aim of this study is to assess and evaluate the significant of performing patient's specification quality assurance (QA) for patients diagnosed with squamous cell carcinoma of the tongue (SCC) whom treated with intensity modulated radiation therapy (IMRT). The study was done in twelve pre- treatment's plans that been prepared for patients. All the ten selected plans are going to be treated with split-field (SF) technique for intensity modulated radiation therapy (IMRT) planning using 10 MV beams and a prescribed dose between 66Gy and 74 Gy. For quality assurance protocol we are using the two-dimensional ionization-chamber array. The study showed that an agreement between the measured dose and the pre-planned dose using TPS. All the plans passed >95% Gamma with the pixels within 5% distance to agreement 5 mm for IMRT patient-specific quality assurance (QA). It concludes that intensity modulated radiation therapy (IMRT) has the ability to deliver a highly conformal dose distribution to the planning target volume while sparing the organs at risk. However, the result showed a very good agreement between measurements dose and calculations dose which lead and proved that the planning using IMRT treatment are accurately done.