What is the role of image-guided radiotherapy (IGRT) in the treatment of prostate cancer?

Updated: Aug 17, 2020
  • Author: Isamettin Andrew Aral, MD, MS; Chief Editor: Edward David Kim, MD, FACS  more...
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The term image-guided radiotherapy (IGRT) refers to the use of additional verification tools in an attempt to ensure proper target localization during the course of radiotherapy. This term has been used for a wide range of imaging techniques, from those as simple as daily port films to those as complicated as computer-assisted patient repositioning devices. Regardless, as highly conformal radiotherapy is administered with increasing frequency (eg, intensity-modulated radiotherapy [IMRT]), accurate target localization becomes mandatory.

Historically, attempts to identify the target’s position focused on imaging performed before each daily treatment, or fraction. Subsequent efforts have attempted to address the significance of organ movement during the daily treatment fraction. [2]

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