In this book, topics related to interaction of radiation with cells are dealt with, in which beneficial damage to cancer cells due to radiation therapy and hazards leading to injuries to normal cells and organs, are described in detail with illustrations and workbook examples. 
Topics, such as biological effects and normal tissue reaction of radiation, biological basis of external beam radiotherapy and brachytherapy, time-dose-fractionation methods, and radiation safety and protection, are well explained in simple terms for all sectors of people to understand.