Introduction And Hypothesis: We hypothesize that there are differences in the position and orientation of ring and Gellhorn pessaries in situ on magnetic resonance imaging (MRI).
Methods: This was a retrospective cohort study comparing MRI findings in 25 women with pessaries in situ at the time of imaging. Scanner coordinates for anatomic and pessary landmarks were obtained and transformed to 3D Pelvic Inclination Correction System coordinates using MATLAB software.