Table 3.

Comparison of gradient nonlinearity distortion statistics generated for 1.0 T Panorama to determine agreement between two approaches

	Established MATLAB/Phantom data (method 1)			Experimental 3D Slicer/modular phantom data (method 2)
	L‐R	A‐P	S‐I	L‐R	A‐P	S‐I
Max distortion (mm)	5.5	4.2	6.1	8.2	6.5	8.7
Voxels distorted > 1 mm (%)	39.3	26.1	25.2	45.6	22.8	45.1
Voxels distorted > 2 mm (%)	14.8	3.2	5	20.0	5.9	12.8
Voxels distorted > 3 mm (%)	4.4	0.4	1.2	7.8	2.2	3.1
Voxels distorted > 4 mm (%)	0.5	<0.1	0.3	2.7	0.8	1.0
Voxels distorted > 5 mm (%)	<0.1	0	<0.1	0.7	0.2	0.3
Mean absolute error (mm)	0.3 ± 0.4	0.2 ± 0.2	0.5 ± 0.6	0.3 ± 0.4	0.3 ± 0.3	0.6 ± 0.6