Biological Evaluation of Grid versus 3D Conformal Radiotherapy in Bulky Head and Neck Cancer.

Unlabelled: Grid radiotherapy is one of the treatment techniques applied to treat patients with advanced bulky tumors.

Purpose: This study aims to estimate the difference in biological and dosimetric parameters of the grid radiotherapy technique for the treatment of bulky head and neck (H and N) tumors and compare it with conventional conformal radiotherapy.

Subjects And Methods: Three-dimensional conformal and grid radiotherapy were designed by the Monaco treatment planning system (TPS).