This book presents the state of the art information regarding the current practices in radiation therapy. Cancer is presently the primary reason of death in economically developed parts of the globe and the second leading reason of death in developing countries. It is a significant global health problem, growing at an alarming rate. Global statistics display that in 2030 alone, around 21.4 million novel cancer cases and 13.2 million cancer deaths are estimated to occur, basically because of the growth, adoption of novel lifestyles and behaviors, and aging of the population. Amongst the existing ways for the treatment of cancer, radiation treatment has a significant effect because of technological progress in latest times. The book encompasses the pros as well as the cons of this treatment modality. It has information provided by top experts and researchers from across the globe.