Comparison dose distribution between 3D-CRT, IMRT and VMAT techniques in stereotactic body radiation therapy for hepatocellular carcinoma

To compare the difference of dose distribution and physical characteristics on treatment plans using three-dimensional conformal radiation therapy (3D-CRT), intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) coplanar (CP) and noncoplanar (NCP) techniques in the treatment of hepatocellular carcinoma (HCC) using stereotactic body radiation therapy (SBRT).