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Table 4 The inter observed variability. The ONSD mean value and range of the difference between the first and the second reader in both 3D DRIVE and T2WI sequences

From: MRI measurement of optic nerve sheath diameter using 3D driven equilibrium sequence as a non-invasive tool for the diagnosis of idiopathic intracranial hypertension

 T2 WI ONSD3D DRIVE ONSDP valueSig.
Mean of difference ± SD0.08 ± 0.1 mm0.01 ± 0.08 mm< 0.001HS
Range of difference0.12–0.5 mm0.13–0.3 mm