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Table 2 Dose difference between D1 and D2 for the evaluated PTV margins

From: Dosimetric effects of adaptive prostate cancer radiotherapy in an MR-linac workflow

  7 mm PTV margin [%] 5 mm PTV margin [%] 3 mm PTV margin [%]
CTV Dmin
p
−1.1 [−37.1 – 0.50]
0.72
−2.0 [−52.5 – 0.42]
0.23
−4.2 [−73.6 – 0.21]
<  0.01
PTV D95%
p
−2.8 [−36.4 – 0.06]
<  0.01
−2.9 [−39.2 – 0.09]
<  0.01
−3.1 [−42.4 – 0.07]
<  0.01
PTV D98%
p
−5.7 [−52.7 – −0.11]
<  0.01
−5.2 [−51.5 – −0.26]
<  0.01
−5.0 [−53.6 – −0.06]
<  0.01
Rectum D15%
p
−3.6 [−52.3 – 28.7]
0.10
−3.6 [−56.1 – 41.7]
0.16
−2.6 [−56.0 – 43.0]
0.23
Bladder Dmean
p
−12.6 [−32.2 – 13.5]
<  0.01
−11.8 [−32.1 – 17.1]
<  0.01
−10.2 [−32.7 – 26.7]
<  0.01
  1. The mean dose difference between D1 and D2 for CTV Dmin, PTV D95%, PTV D98%, rectum D15% and bladder Dmean. Values in square brackets represent the range of dose difference. Differences between D1 and D2 with PTV margin of 7 mm, 5 mm and 3 mm are shown. Negative numbers indicate a decrease in dose from D1 to D2. The p-value for each structure is displayed for all PTV margins
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