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repeat CT
4D CT
4D CBCT
4D MRI
Quantification
of organ motion
Organ motion
analysis
Analysis of prostate motion
and deformation
(Deurloo et al IJROBP 2004)
local shape variation displayed
in color wash on average GTV
0-0.25 0.25-0.75 0.75-1.25 1.25-1.75 1.75-2.25 2.25-2.75
SD (mm)