Geometric distortion assessment in 3T MR images used for treatment planning in cranial Stereotactic Radiosurgery and Radiotherapy
Fig 3
Magnitude of the radial spatial offset, |dR|, for all 26 control points with respect to their distance from the MRI isocenter.
Using Spearman’s correlation coefficient, a statistically significant positive correlation between the distance to the MRI isocenter and detected radial offset was revealed for all three datasets.