borderline significantP = .05
Predicted versus reoptimized plan target dose delivery In comparing the dosimetry of the single-fraction SABR predicted plans to the reoptimized plans on the first 5 setup MRI scans, there was a borderline significant 4.7% increase in the mean PTV V 95% when the predicted plan was reoptimized (85.0% vs 88.1%, P = .05; Fig 2 ).