Why it's done

IGRT is used to treat all types of cancer, but it's particularly ideal for tumors and cancers located very close to sensitive structures and organs. IGRT is also useful for tumors that are likely to move during treatment or between treatments.

IGRT is used as part of radiation treatment plans because it offers:

• Accurate delivery of radiation
• Improved definition, localization and monitoring of tumor position, size and shape before and during treatment
• The possibility of higher, targeted radiation dosage to improve tumor control
• Decreased radiation exposure to normal tissue surrounding the tumor