MRI protocols for the study patients were shown in S1 Table. Tumor volume was measured in the axial plane on thin-slice contrast-enhanced T1-weighted images (T1WI) in 83 patients and on either fast imaging employing steady-state acquisition-cycled phases (FIESTA-C) or balanced fast field echo sequences (bFFE) in the others. Slice thickness ranged from 0.8 to 2 mm, including 16 2D images with a slice thickness of 0.9 to 2 mm with zero gap, and 84 3D images with a slice thickness of 0.8 to 1.4 mm zero interpolated (ZIP) by a factor of 2 to approximately 0.4 to 0.7 mm.
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