The present book shows the following: (1)An example of a quality assurance procedure of the 3D-planning system in some physical aspects such as block fields, wedged fields, MU calculations and in homogeneity corrections. (2)An example of a quality assurance procedure of the 2D-planning system in some physical aspects such as MU calculations and in homogeneity corrections. (3)A conventional 2D-TP was compared to 3D-TP for 10 patients with breast and bladder cancer. Both types of treatment planning were performed with two tangential fields for patients with breast cancer and 3-fields technique...