Evaluation of Surface Dose for Intensity Modulated Radiotherapy of Head and Neck Cancer Using Thermoluminescent Dosimeters

Accurate estimation of the surface dose in radiotherapy patients with head and neck cancer is very important terms treatment. The aim this study to evaluate for intensity-modulated (IMRT) using thermoluminescent dosimeters (TLDs). In addition, it aimed examine estimates treatment planning system (TPS) different grid sizes. Before computed tomography (CT) images were taken 15 patients, 5 points determined region marked a way that would not cause artifacts. IMRT plans are created 1.5 2.5 mm Surface doses obtained TPS calculations TLD measurements at region. from sizes compared. All received 3-stage adaptive (ART) comparison was repeated each plan. According plan 0, height size 4.06% 7.87%, respectively. Plan 1, difference between 4.00% 8.15% 1.5mm 2.5mm, respectively (p=0.00 p=0.00). For 2, 4.07% 9.96% all higher than calculations. calculated usually lower prescribed dose. Therefore, during evaluation plans, should be considered underestimates This ratio can by dosimetric measurements. Thermoluminescent suitable equipment process.