LAUSR

Highlights • 45 data sets (18 on a 1.5 T MR and 27 on a 3 T MR) were evaluated for susceptibility induced distortions.• Maximum distortions of up to 1.7 mm were found for organs at risk in standard diagnostic settings.• Median distortions ranged between 0.1 and 0.2 mm for all organs at risk.• Active shimming was estimated to reduce distortions by a factor of 2.3 to 2.9.• A safety margin of 1 mm would have encompassed 99.8% of the distortions.