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Radiology Research and Practice
Volume 2014, Article ID 705604, 10 pages
Review Article

Image Guidance in Radiation Therapy: Techniques and Applications

Division of Radiation Oncology, Medanta Cancer Institute, Medanta-The Medicity, Gurgaon, Haryana 122001, India

Received 10 July 2014; Accepted 28 October 2014; Published 17 December 2014

Academic Editor: Paul Sijens

Copyright © 2014 Shikha Goyal and Tejinder Kataria. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In modern day radiotherapy, the emphasis on reduction on volume exposed to high radiotherapy doses, improving treatment precision as well as reducing radiation-related normal tissue toxicity has increased, and thus there is greater importance given to accurate position verification and correction before delivering radiotherapy. At present, several techniques that accomplish these goals impeccably have been developed, though all of them have their limitations. There is no single method available that eliminates treatment-related uncertainties without considerably adding to the cost. However, delivering “high precision radiotherapy” without periodic image guidance would do more harm than treating large volumes to compensate for setup errors. In the present review, we discuss the concept of image guidance in radiotherapy, the current techniques available, and their expected benefits and pitfalls.