MR protocol
Images were obtained with 3.0T MRI system (Magnetom Skyra, Siemens Healthineers, Signa, GE Medical Systems). The patients should be instructed to maintain their heads motionless and, if required, to apply a gasket before the examination. The Siemens Skyra 3.0T MRI scanning parameters were as follows: T1WI: TE16ms, TR2170ms, thickness5mm, matrix256 × 256, T2WI: TE95ms, TR3400ms, thickness5mm, matrix384 × 384, DWI: TE87ms, TR4800ms, b = 1000s/mm2, thickness5mm, matrix168 × 180. The scanning settings after contrast injection were: TE2.26ms, TR2300ms, thickness1mm, matrix256 × 256. The GE 3.0T MRI scanning parameters were as follows: T1WI: TE28.25ms, TR:1962.20ms, thickness5mm, matrix512 × 512, T2WI: TE123.26ms, TR5100ms, thickness5mm, matrix512 × 512, DWI: TE75.10ms, TR5400.00ms, b = 1000s/mm2, thickness5mm, matrix256 × 256 mm. The scanning settings after contrast injection were: TE26.85ms, TR2693.36ms, thickness5ms, thickness512 × 512.