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)
|
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|---|---|---|---|---|---|---|
| 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 |
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| Voxels distorted > 1 mm (%) | 39.3 | 26.1 | 25.2 | 45.6 | 22.8 | 45.1 |
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| Voxels distorted > 2 mm (%) | 14.8 | 3.2 | 5 | 20.0 | 5.9 | 12.8 |
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| Voxels distorted > 3 mm (%) | 4.4 | 0.4 | 1.2 | 7.8 | 2.2 | 3.1 |
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| Voxels distorted > 4 mm (%) | 0.5 | <0.1 | 0.3 | 2.7 | 0.8 | 1.0 |
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| Voxels distorted > 5 mm (%) | <0.1 | 0 | <0.1 | 0.7 | 0.2 | 0.3 |
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| 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 |