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• IGRT is the process of frequent

two and three-dimensional

imaging

, during a course of RT,

utilizing the imaging

coordinates

.

• The patient is localized in the treatment room in the

same

position as planned

from the reference imaging dataset.

• An example of IGRT would include:

- localization of a

CBCT

dataset with the planning

CT

dataset

- matching planar

kV

or

MV

images with

DRRs