Dr Paul B Ravindran is a retired professor of Radiation
Physics of the Christian Medical College (CMC), Vellore, India. He has more
than 35 years of teaching experience in medical physics. He has been teaching
radiation physics to Radiation Oncology residents, students of master's program
in Medical Physics and Radiotherapy and Imaging technology students at CMC
Vellore. He has served as an expert for several missions of the International
Atomic Energy Agency (IAEA) to various countries in Southeast Asia and the
Pacific region. He also served as a full-time consultant medical physicist at
the International Atomic Energy Agency (IAEA) for a year during 2019-2020. He
was convenor of the Medical Radiation Technology Training committee (MRTTC) of
Christian Medical Association of India (CMAI) from 2005 to 2019. Dr Ravindran
has significant international experience and has worked at the London Regional
Cancer Program, London, ON Canada for two years, and is also a Fellow of the
Canadian College of Physicists in Medicine. Dr Ravindran has more than fifty
publications in peer reviewed journals and has delivered numerous lectures and
presentations at several national and international conferences. In 2020 Dr
Ravindran was awarded the 'Outstanding Medical Physicist" award by the
Asia-Oceania Federation of Organizations for Medical Physics (AFOMP). Dr
Ravindran is currently working as the Chief Medical Physicist at the Christian
Institute of Health Sciences and Research, Dimapur, Nagaland, India

Acknowledgements
Dedication
Preface
Chapter 1 - Introduction and Historical Perspective
Chapter 2 - Two Dimensional (2D) Off-line Image Guidance in Radiation Therapy
Chapter 3 - Electronic Portal Imaging Devices
Chapter 4 - Two Dimensional (2D) Kilo Voltage Image Guidance Systems
Chapter 5 - Volumetric Radiological Image Guidance Systems
Chapter 6 - Commissioning, Quality Assurance and Dose During IGRT
Chapter 7 - Ultrasound for Image Guidance in External Beam Radiation Therapy
Chapter 8 - Magnetic Resonance Image-Guided Radiotherapy (MRIgRT)
Chapter 9 - The Science Behind Surface Guidance