The comparison of DVHs for normal liver in 3DCRT, IMRT and RA for the smaller tumor. Right figure: DVHs of PTV. These three techniques produced similar homogeneity of the PTV and 3DCRT obtained highest volume of hot spot. Left figure: DVHs of normal liver. These three techniques produced similar low-dose distributions the liver. 3DCRT obtained the highest V20 and V30, whereas no statistical difference was observed.