Digitized Points Sphere Fitting Marker Radius (mm) Coordinates [x,y,z] (mm) FMR-L 10.26 -30.1233, 25.0602, 75.1475 FMR-M 10.48 26.2838, 19.4560, 72.7820 FMR-P 10.49 -4.3998, -9.6729, 62.3284 Distances between markers Marker 1 Marker 2 Distance (mm) FMR-L FMR-M 56.73 FMR-L FMR-P 45.08 FMR-M FMR-P 43.58 STL Spheres - MRI Sphere Fitting Marker Radius (mm) Coordinates [x,y,z] (mm) FMR-L 8.38 -29.4605, 25.1325, 75.1701 FMR-M 8.69 25.5240, 19.5456, 72.8190 FMR-P 8.55 -4.3028, -9.8348, 62.2687 Distances between markers Marker 1 Marker 2 Distance (mm) FMR-L FMR-M 55.32 FMR-L FMR-P 44.97 FMR-M FMR-P 43.18 Differences between digitized and MRI registration Marker 1 Marker 2 Distance Diff Angle(deg) FMR-L FMR-M 1.42 mm [2.50 %] 0.14 FMR-L FMR-P 0.11 mm [0.25 %] 0.77 FMR-M FMR-P 0.40 mm [0.93 %] 1.06 Average 0.65 mm [1.23 %] 0.66 Maximum 1.42 mm [2.50 %] 1.06