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Table 1 Worst and mean observed distortion measured from March 2017 to May 2018 on the MR-scanner

From: MR-PROTECT: Clinical feasibility of a prostate MRI-only radiotherapy treatment workflow and investigation of acceptance criteria

Geometric distortion over 15 months (mm)
Radial distance from isocenter< 100100–150150–200200–250
Mean distortion (1 SD) [range]0.2 (0.0) [0.1–0.2]0.3 (0.0) [0.2–0.4]0.5 (0.1) [0.4–0.7]1.9 (0.1) [1.7–2.0]
Mean of max distortion (1 SD) [range]0.6 (0.1) [0.4–0.7]0.8 (0.2) [0.6–1.1]1.6 (0.3) [1.4–2.6]7.9 (0.3) [7.4–8.6]