Comparison of the accuracy and precision of prostate localization with 2D-2D and 3D images

The study shows that the precision of the 2D-2D set-up is equivalent to the precision of the 3D images. It also shows that the soft-tissue based set-up needs 1 mm larger set-up margins than the marker based set-up for the prostate patients, when CBCT is used for daily verification of the location of the prostate.