Radiotherapy or RT is a medical technique used for the treatment of
cancer particularly, to kill or control the growth of malignant cells.
The procedure uses ionizing radiation and is delivered by a linear
accelerator. The radiation damages the DNA of cancerous tissue thereby
leading to cellular death. Besides the tumor itself, the radiation may
target the draining lymph involved with the tumor. RT is performed when
cancer is localized to one area of the body. It can also be a part of
adjuvant therapy for preventing tumor recurrence after surgery of a
primary malignant tumor. Often, RT is used in conjunction with
chemotherapy, and may also be used as palliative treatment. This book
includes some of the vital pieces of work being conducted across the
world, on various topics related to the theory and practice of
radiotherapy. It provides significant information of this discipline to
help develop a good understanding of RT and its implications,
applications and consequences. It will prove to be immensely beneficial
to students and researchers in the fields of oncology and radiation
oncology.