Field-in-Field Technique Improves the Dosimetric Outcome of Treatment Plans Compared with the Three-Dimensional Conformal Radiation Therapy for Esophageal Cancer Radiotherapy

Özet

The aim of this study was to evaluate and compare the dosimetric parameters of three-dimensional conformal radiotherapy (3D-CRT) and field-in-field (FIF) techniques for patients with esophageal cancer. Twenty (20) patients with esophageal cancer participated in this study. Two planning techniques (FIF and 3D-CRT) were generated for each patient by the TiGRT treatment planning system. Two in-dices namely: Dose Homogeneity Index (DHI) and Conformity index (CI), as well as maximum dose, mean dose, minimum dose, dose received by 2% of the target volume (D2); dose received by 98% of the target volume (D98); volume received greater than 107% of the prescribed dose (V> 107%); volume received less than 95% of the prescribed dose (V 107%, CI and MUs compared with the 3D-CRT technique. In addition, the FIF technique demonstrated reduced dose received by the OARs in the treated region. The FIF technique enables better dose distribution in the PTV and reduces dose to OARs in esophageal radiotherapy.